Andrić, Ljubiša

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  • Andrić, Ljubiša (32)
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Author's Bibliography

Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders

Terzić, Anja; Radulović, Dragan; Pezo, Milada; Stojanović, Jovica; Pezo, Lato; Radojević, Zagorka; Andrić, Ljubiša

(Elsevier Sci Ltd, Oxford, 2020)

TY  - JOUR
AU  - Terzić, Anja
AU  - Radulović, Dragan
AU  - Pezo, Milada
AU  - Stojanović, Jovica
AU  - Pezo, Lato
AU  - Radojević, Zagorka
AU  - Andrić, Ljubiša
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/393
AB  - The optimal outputs of pyrophyllite mechano-chemical activation in an ultra-centrifugal mill performing under different technological conditions were determined by analytical modeling and verified via Artificial Neural Network in order to be employed in the production of cement-based binders. Cluster Analysis and Principal Component Analysis were utilized in assessment of the effect of activation process parameters on the activated pyrophyllite quality. Artificial Neural Network which performed with high prediction accuracy, i.e. 0.914 during the training period, was sufficient for precise prediction of activated pyrophyllite quality in a wide range of processing parameters. The probability of utilization of observed activation products was estimated through interrelation of technological parameters (mesh size sieve, activation period, specific energy consumption) and acquired characteristics of pyrophyllite (grain diameter, specific surface area). The optimal products singled out from each activation sequence were used as mineral additives in the mix-designs of four cement binders (cement replacement portion was 30%). Influence of activated pyrophyllite additions on the cement chemistry, mineral phase compositions and microstructures of the cement binders were monitored by instrumental techniques (DTA/TGA, XRD, SEM). Activated pyrophyllite showed characteristics of pozzolana as it slightly accelerated early stages of hydration, decreased cement hydration energy and increased the quantity of cement mineral alite at later hydration stages. Micron-sized crystalline foila characteristic for mechanically activated pyrophyllite formed micro-reinforcement within cement binder microstructure.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders
VL  - 258
DO  - 10.1016/j.conbuildmat.2020.119721
ER  - 
@article{
author = "Terzić, Anja and Radulović, Dragan and Pezo, Milada and Stojanović, Jovica and Pezo, Lato and Radojević, Zagorka and Andrić, Ljubiša",
year = "2020",
abstract = "The optimal outputs of pyrophyllite mechano-chemical activation in an ultra-centrifugal mill performing under different technological conditions were determined by analytical modeling and verified via Artificial Neural Network in order to be employed in the production of cement-based binders. Cluster Analysis and Principal Component Analysis were utilized in assessment of the effect of activation process parameters on the activated pyrophyllite quality. Artificial Neural Network which performed with high prediction accuracy, i.e. 0.914 during the training period, was sufficient for precise prediction of activated pyrophyllite quality in a wide range of processing parameters. The probability of utilization of observed activation products was estimated through interrelation of technological parameters (mesh size sieve, activation period, specific energy consumption) and acquired characteristics of pyrophyllite (grain diameter, specific surface area). The optimal products singled out from each activation sequence were used as mineral additives in the mix-designs of four cement binders (cement replacement portion was 30%). Influence of activated pyrophyllite additions on the cement chemistry, mineral phase compositions and microstructures of the cement binders were monitored by instrumental techniques (DTA/TGA, XRD, SEM). Activated pyrophyllite showed characteristics of pozzolana as it slightly accelerated early stages of hydration, decreased cement hydration energy and increased the quantity of cement mineral alite at later hydration stages. Micron-sized crystalline foila characteristic for mechanically activated pyrophyllite formed micro-reinforcement within cement binder microstructure.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders",
volume = "258",
doi = "10.1016/j.conbuildmat.2020.119721"
}
Terzić, A., Radulović, D., Pezo, M., Stojanović, J., Pezo, L., Radojević, Z.,& Andrić, L.. (2020). Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 258.
https://doi.org/10.1016/j.conbuildmat.2020.119721
Terzić A, Radulović D, Pezo M, Stojanović J, Pezo L, Radojević Z, Andrić L. Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders. in Construction and Building Materials. 2020;258.
doi:10.1016/j.conbuildmat.2020.119721 .
Terzić, Anja, Radulović, Dragan, Pezo, Milada, Stojanović, Jovica, Pezo, Lato, Radojević, Zagorka, Andrić, Ljubiša, "Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders" in Construction and Building Materials, 258 (2020),
https://doi.org/10.1016/j.conbuildmat.2020.119721 . .
9
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11

Performances of Vermiculite and Perlite Based Thermal Insulation Lightweight Concretes

Terzić, Anja; Stojanović, Jovica; Andrić, Ljubiša; Miličić, Ljiljana; Radojević, Zagorka

(Međunarodni Institut za nauku o sinterovanju, Beograd, 2020)

TY  - JOUR
AU  - Terzić, Anja
AU  - Stojanović, Jovica
AU  - Andrić, Ljubiša
AU  - Miličić, Ljiljana
AU  - Radojević, Zagorka
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/390
AB  - This experimental study was conducted with an aim to investigate the effect of the elevated temperature on the mineral phase composition, microstructure and mechanical properties of the thermal insulation lightweight concretes. The first group of experimental concretes was based on the expanded vermiculite and expanded perlite used as lightweight aggregates (in 65 wt%) in combination with either ordinary Portland cement or refractory calcium aluminate cement. The mix-design of the second group of concretes comprised standard quartz aggregate, vermiculite or perlite as aggregate replacement (25 wt%) and binder (PC or CAC). A total of 10 concrete mix-designs were fabricated in form of 40x40x160 mm samples which were submitted to heat-treatment at 400 degrees, 600 degrees, 800 degrees and 1000 degrees C upon standard 28-days period of curing and hardening. The changes in crystallinity and mineral phase composition induced by temperature were monitored by X-ray diffraction technique. Microstructural visualizations of the non-fired and fired concrete samples were conducted by scanning electron microscopy accompanied with EDX analysis. The results indicated that despite the decrease in compressive strengths upon firing, investigated lightweight concretes can be categorized both as thermal insulators and structural materials.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Performances of Vermiculite and Perlite Based Thermal Insulation Lightweight Concretes
EP  - 162
IS  - 2
SP  - 149
VL  - 52
DO  - 10.2298/SOS2002149T
ER  - 
@article{
author = "Terzić, Anja and Stojanović, Jovica and Andrić, Ljubiša and Miličić, Ljiljana and Radojević, Zagorka",
year = "2020",
abstract = "This experimental study was conducted with an aim to investigate the effect of the elevated temperature on the mineral phase composition, microstructure and mechanical properties of the thermal insulation lightweight concretes. The first group of experimental concretes was based on the expanded vermiculite and expanded perlite used as lightweight aggregates (in 65 wt%) in combination with either ordinary Portland cement or refractory calcium aluminate cement. The mix-design of the second group of concretes comprised standard quartz aggregate, vermiculite or perlite as aggregate replacement (25 wt%) and binder (PC or CAC). A total of 10 concrete mix-designs were fabricated in form of 40x40x160 mm samples which were submitted to heat-treatment at 400 degrees, 600 degrees, 800 degrees and 1000 degrees C upon standard 28-days period of curing and hardening. The changes in crystallinity and mineral phase composition induced by temperature were monitored by X-ray diffraction technique. Microstructural visualizations of the non-fired and fired concrete samples were conducted by scanning electron microscopy accompanied with EDX analysis. The results indicated that despite the decrease in compressive strengths upon firing, investigated lightweight concretes can be categorized both as thermal insulators and structural materials.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Performances of Vermiculite and Perlite Based Thermal Insulation Lightweight Concretes",
pages = "162-149",
number = "2",
volume = "52",
doi = "10.2298/SOS2002149T"
}
Terzić, A., Stojanović, J., Andrić, L., Miličić, L.,& Radojević, Z.. (2020). Performances of Vermiculite and Perlite Based Thermal Insulation Lightweight Concretes. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 52(2), 149-162.
https://doi.org/10.2298/SOS2002149T
Terzić A, Stojanović J, Andrić L, Miličić L, Radojević Z. Performances of Vermiculite and Perlite Based Thermal Insulation Lightweight Concretes. in Science of Sintering. 2020;52(2):149-162.
doi:10.2298/SOS2002149T .
Terzić, Anja, Stojanović, Jovica, Andrić, Ljubiša, Miličić, Ljiljana, Radojević, Zagorka, "Performances of Vermiculite and Perlite Based Thermal Insulation Lightweight Concretes" in Science of Sintering, 52, no. 2 (2020):149-162,
https://doi.org/10.2298/SOS2002149T . .
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5

Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash

Terzić, Anja; Pezo, Lato; Miličić, Ljiljana; Mijatović, Nevenka; Radojević, Zagorka; Radulović, Dragan; Andrić, Ljubiša

(Međunarodni Institut za nauku o sinterovanju, Beograd, 2019)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Miličić, Ljiljana
AU  - Mijatović, Nevenka
AU  - Radojević, Zagorka
AU  - Radulović, Dragan
AU  - Andrić, Ljubiša
PY  - 2019
UR  - http://rims.institutims.rs/handle/123456789/374
AB  - Mineral additives are extensively applied as cement replacement materials in both construction concrete and mortar. Fly ash is one of the most commonly utilized additives which improve Theological properties, as well as thermal and mechanical behavior of mortar, and as such it has been widely investigated. This industrial byproduct comprises heavy metals in its composition; therefore further research is needed to optimize its effective dosage. Moreover, certain sorptive clays, such as natural zeolite and bentonite, can prevent migration of toxic elements from fly ash by immobilizing them in their structure. Ten experimental mortars are prepared with Portland cement, river sand and addition of fly ash, zeolite and/or bentonite in accordance with chemometric experimental design rules. The aim of the study was to investigate the effect of mineral additives on thermal and mechanical performances of mortar. Thermal characteristics were monitored via dilatometric analysis and DTA method. Principal component analysis was used on the results of physico-mechanical testing (workability, bulk density, water absorption, shrinkage, compressive and flexural strength) to enable the divisions of the observed samples into groups in the factor space. The performance of Artificial Neural Network was compared with the experimental data in order to develop rapid and accurate method for prediction of mechanical parameters of mortar. The ANN model showed high overall prediction accuracy (r(2) = 0.989, during training cycle). The test results indicate that incorporation of the mineral additives gave cost effective mortars with sufficiently good properties. However, tools of analytical modeling highlighted mortar with zeolite and fly ash as the optimal composition regarding its mechanical performance.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash
EP  - 56
IS  - 1
SP  - 39
VL  - 51
DO  - 10.2298/SOS1901039T
ER  - 
@article{
author = "Terzić, Anja and Pezo, Lato and Miličić, Ljiljana and Mijatović, Nevenka and Radojević, Zagorka and Radulović, Dragan and Andrić, Ljubiša",
year = "2019",
abstract = "Mineral additives are extensively applied as cement replacement materials in both construction concrete and mortar. Fly ash is one of the most commonly utilized additives which improve Theological properties, as well as thermal and mechanical behavior of mortar, and as such it has been widely investigated. This industrial byproduct comprises heavy metals in its composition; therefore further research is needed to optimize its effective dosage. Moreover, certain sorptive clays, such as natural zeolite and bentonite, can prevent migration of toxic elements from fly ash by immobilizing them in their structure. Ten experimental mortars are prepared with Portland cement, river sand and addition of fly ash, zeolite and/or bentonite in accordance with chemometric experimental design rules. The aim of the study was to investigate the effect of mineral additives on thermal and mechanical performances of mortar. Thermal characteristics were monitored via dilatometric analysis and DTA method. Principal component analysis was used on the results of physico-mechanical testing (workability, bulk density, water absorption, shrinkage, compressive and flexural strength) to enable the divisions of the observed samples into groups in the factor space. The performance of Artificial Neural Network was compared with the experimental data in order to develop rapid and accurate method for prediction of mechanical parameters of mortar. The ANN model showed high overall prediction accuracy (r(2) = 0.989, during training cycle). The test results indicate that incorporation of the mineral additives gave cost effective mortars with sufficiently good properties. However, tools of analytical modeling highlighted mortar with zeolite and fly ash as the optimal composition regarding its mechanical performance.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash",
pages = "56-39",
number = "1",
volume = "51",
doi = "10.2298/SOS1901039T"
}
Terzić, A., Pezo, L., Miličić, L., Mijatović, N., Radojević, Z., Radulović, D.,& Andrić, L.. (2019). Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 51(1), 39-56.
https://doi.org/10.2298/SOS1901039T
Terzić A, Pezo L, Miličić L, Mijatović N, Radojević Z, Radulović D, Andrić L. Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash. in Science of Sintering. 2019;51(1):39-56.
doi:10.2298/SOS1901039T .
Terzić, Anja, Pezo, Lato, Miličić, Ljiljana, Mijatović, Nevenka, Radojević, Zagorka, Radulović, Dragan, Andrić, Ljubiša, "Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash" in Science of Sintering, 51, no. 1 (2019):39-56,
https://doi.org/10.2298/SOS1901039T . .
3
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Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics

Terzić, Anja; Obradović, Nina; Kosanović, Darko; Stojanović, Jovica; Đorđević, Antonije; Andrić, Ljubiša; Pavlović, Vladimir

(Elsevier Sci Ltd, Oxford, 2019)

TY  - JOUR
AU  - Terzić, Anja
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Stojanović, Jovica
AU  - Đorđević, Antonije
AU  - Andrić, Ljubiša
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://rims.institutims.rs/handle/123456789/373
AB  - Steatite, as ceramic with composition predominantly resting on magnesium silicate, was produced from economic resources - talc, aluminosilicate clays, and either BaCO3 or feldspar as flux. Titanium dioxide was a doping agent. Four steatite mixtures were mechanically activated in a planetary ball mill for 30, 45 or 60 min, prior to the thermal treatment. Two-step sintering with initial phase set at 1350 degrees C and holding period conducted at 1250 degrees C was applied to initiate diffusion and prevent grain growth. Thereby, a high density ceramic material with low-porous submicron structure was acquired. The effects of TiO2 addition on densification, microstructure, and dielectric characteristics of steatites were monitored. The thermal stability of green mixtures was tested by differential thermal and thermogravimetric analyses. Changes in crystallinity and mineral phase composition were observed by the X-ray diffraction technique. Microstructural visualization with spatial arrangements of individual chemical elements on surface of the sintered ceramics was acquired by scanning electron microscopy accompanied with EDS mapping. In order to test the possibility of employment of the obtained steatites in insulation materials, electrical measurements were conducted by recording variations of the dielectric constant and loss tangent as a function of alternations in the mix-design and the mechanical activation period.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics
EP  - 3022
IS  - 3
SP  - 3013
VL  - 45
DO  - 10.1016/j.ceramint.2018.10.120
ER  - 
@article{
author = "Terzić, Anja and Obradović, Nina and Kosanović, Darko and Stojanović, Jovica and Đorđević, Antonije and Andrić, Ljubiša and Pavlović, Vladimir",
year = "2019",
abstract = "Steatite, as ceramic with composition predominantly resting on magnesium silicate, was produced from economic resources - talc, aluminosilicate clays, and either BaCO3 or feldspar as flux. Titanium dioxide was a doping agent. Four steatite mixtures were mechanically activated in a planetary ball mill for 30, 45 or 60 min, prior to the thermal treatment. Two-step sintering with initial phase set at 1350 degrees C and holding period conducted at 1250 degrees C was applied to initiate diffusion and prevent grain growth. Thereby, a high density ceramic material with low-porous submicron structure was acquired. The effects of TiO2 addition on densification, microstructure, and dielectric characteristics of steatites were monitored. The thermal stability of green mixtures was tested by differential thermal and thermogravimetric analyses. Changes in crystallinity and mineral phase composition were observed by the X-ray diffraction technique. Microstructural visualization with spatial arrangements of individual chemical elements on surface of the sintered ceramics was acquired by scanning electron microscopy accompanied with EDS mapping. In order to test the possibility of employment of the obtained steatites in insulation materials, electrical measurements were conducted by recording variations of the dielectric constant and loss tangent as a function of alternations in the mix-design and the mechanical activation period.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics",
pages = "3022-3013",
number = "3",
volume = "45",
doi = "10.1016/j.ceramint.2018.10.120"
}
Terzić, A., Obradović, N., Kosanović, D., Stojanović, J., Đorđević, A., Andrić, L.,& Pavlović, V.. (2019). Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 45(3), 3013-3022.
https://doi.org/10.1016/j.ceramint.2018.10.120
Terzić A, Obradović N, Kosanović D, Stojanović J, Đorđević A, Andrić L, Pavlović V. Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics. in Ceramics International. 2019;45(3):3013-3022.
doi:10.1016/j.ceramint.2018.10.120 .
Terzić, Anja, Obradović, Nina, Kosanović, Darko, Stojanović, Jovica, Đorđević, Antonije, Andrić, Ljubiša, Pavlović, Vladimir, "Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics" in Ceramics International, 45, no. 3 (2019):3013-3022,
https://doi.org/10.1016/j.ceramint.2018.10.120 . .
1
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2

The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders

Terzić, Anja; Pezo, Lato; Mijatović, Nevenka; Stojanović, Jovica; Kragović, Milan; Miličić, Ljiljana; Andrić, Ljubiša

(Elsevier Sci Ltd, Oxford, 2018)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Mijatović, Nevenka
AU  - Stojanović, Jovica
AU  - Kragović, Milan
AU  - Miličić, Ljiljana
AU  - Andrić, Ljubiša
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/345
AB  - Instrumental analyses accompanied by analytical modeling tools were employed to assess physico-chemical changes induced by variations in chemical composition of cementitious composites, i.e. mortar binders. Coal combustion ash was utilized as pozzolanic mineral additive. The binders' mix-design was supplemented with sorptive clays to prevent migration of toxic elements from fly ash. The experiment was established on the premise of clay's ion-exchanging ability. Ten binders comprising cement CEM I 42.5 and fly ash, zeolite and/or bentonite additions were prepared in accordance with chemometric experimental design rules. Chemical composition was determined via XRF method. The changes in mineral phases and crystallinity were traced by X-ray diffraction. Hydration mechanisms and thermal behavior were investigated via DTA/TGA. The chemical bonds were identified by FTIR. Morphology of hardened samples was detected by SEM. Mathematical tools employed data sets of instrumental analyses to form a clear differentiation between binders and to assess changes caused by adoption of mineral additives in the mix designs. Sorptive clays showed pozzolanic behavior, thereby causing no incapacitation to the cement hydration mechanism, and classifying as a possible economical resources which can be used in production technology of construction materials to redeem environmental pollution issues of building industry.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders
EP  - 210
SP  - 199
VL  - 180
DO  - 10.1016/j.conbuildmat.2018.06.007
ER  - 
@article{
author = "Terzić, Anja and Pezo, Lato and Mijatović, Nevenka and Stojanović, Jovica and Kragović, Milan and Miličić, Ljiljana and Andrić, Ljubiša",
year = "2018",
abstract = "Instrumental analyses accompanied by analytical modeling tools were employed to assess physico-chemical changes induced by variations in chemical composition of cementitious composites, i.e. mortar binders. Coal combustion ash was utilized as pozzolanic mineral additive. The binders' mix-design was supplemented with sorptive clays to prevent migration of toxic elements from fly ash. The experiment was established on the premise of clay's ion-exchanging ability. Ten binders comprising cement CEM I 42.5 and fly ash, zeolite and/or bentonite additions were prepared in accordance with chemometric experimental design rules. Chemical composition was determined via XRF method. The changes in mineral phases and crystallinity were traced by X-ray diffraction. Hydration mechanisms and thermal behavior were investigated via DTA/TGA. The chemical bonds were identified by FTIR. Morphology of hardened samples was detected by SEM. Mathematical tools employed data sets of instrumental analyses to form a clear differentiation between binders and to assess changes caused by adoption of mineral additives in the mix designs. Sorptive clays showed pozzolanic behavior, thereby causing no incapacitation to the cement hydration mechanism, and classifying as a possible economical resources which can be used in production technology of construction materials to redeem environmental pollution issues of building industry.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders",
pages = "210-199",
volume = "180",
doi = "10.1016/j.conbuildmat.2018.06.007"
}
Terzić, A., Pezo, L., Mijatović, N., Stojanović, J., Kragović, M., Miličić, L.,& Andrić, L.. (2018). The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 180, 199-210.
https://doi.org/10.1016/j.conbuildmat.2018.06.007
Terzić A, Pezo L, Mijatović N, Stojanović J, Kragović M, Miličić L, Andrić L. The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders. in Construction and Building Materials. 2018;180:199-210.
doi:10.1016/j.conbuildmat.2018.06.007 .
Terzić, Anja, Pezo, Lato, Mijatović, Nevenka, Stojanović, Jovica, Kragović, Milan, Miličić, Ljiljana, Andrić, Ljubiša, "The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders" in Construction and Building Materials, 180 (2018):199-210,
https://doi.org/10.1016/j.conbuildmat.2018.06.007 . .
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37

Discrete element model of particle transport and premixing action in modified screw conveyors

Pezo, Milada; Pezo, Lato; Jovanović, Aca P.; Terzić, Anja; Andrić, Ljubiša; Lončar, Biljana; Kojić, Predrag

(Elsevier Science Bv, Amsterdam, 2018)

TY  - JOUR
AU  - Pezo, Milada
AU  - Pezo, Lato
AU  - Jovanović, Aca P.
AU  - Terzić, Anja
AU  - Andrić, Ljubiša
AU  - Lončar, Biljana
AU  - Kojić, Predrag
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/353
AB  - In this paper, five types of horizontal single-pitch screw conveyors with modified geometry, with three different lengths (400, 600 and 800 mm) were investigated for transport and auxiliary mixing action of two materials: natural zeolite and quartz aggregate (sand) with particle sizes 3, 4 and 5 mm. The geometry of the screw transporter is changed by welding three additional helices oriented in the same or the opposite direction from screw cutting edges, enabling the premixing of materials, during the transport. The proper mixing of the observed materials provides an adequate disposition of zeolite particles within the composite and prevents agglomeration and interference with cement hydration. Zeolite application as a binder in a building material is a possible solution to environmental pollution problems caused by cement production. The influences of screw length, particle diameter, the studied geometry variations of screw design, on the mixing performances of the screw conveyor-mixer during material transport were explored. All investigations were performed experimentally and numerically, by using Discrete Element Method (DEM). The experimental results and the results of the DEM investigation were used for the development of mathematical models for the prediction of mixing quality, which are presented in the form of second order polynomial and artificial neural network model.
PB  - Elsevier Science Bv, Amsterdam
T2  - Powder Technology
T1  - Discrete element model of particle transport and premixing action in modified screw conveyors
EP  - 264
SP  - 255
VL  - 336
DO  - 10.1016/j.powtec.2018.06.009
ER  - 
@article{
author = "Pezo, Milada and Pezo, Lato and Jovanović, Aca P. and Terzić, Anja and Andrić, Ljubiša and Lončar, Biljana and Kojić, Predrag",
year = "2018",
abstract = "In this paper, five types of horizontal single-pitch screw conveyors with modified geometry, with three different lengths (400, 600 and 800 mm) were investigated for transport and auxiliary mixing action of two materials: natural zeolite and quartz aggregate (sand) with particle sizes 3, 4 and 5 mm. The geometry of the screw transporter is changed by welding three additional helices oriented in the same or the opposite direction from screw cutting edges, enabling the premixing of materials, during the transport. The proper mixing of the observed materials provides an adequate disposition of zeolite particles within the composite and prevents agglomeration and interference with cement hydration. Zeolite application as a binder in a building material is a possible solution to environmental pollution problems caused by cement production. The influences of screw length, particle diameter, the studied geometry variations of screw design, on the mixing performances of the screw conveyor-mixer during material transport were explored. All investigations were performed experimentally and numerically, by using Discrete Element Method (DEM). The experimental results and the results of the DEM investigation were used for the development of mathematical models for the prediction of mixing quality, which are presented in the form of second order polynomial and artificial neural network model.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Powder Technology",
title = "Discrete element model of particle transport and premixing action in modified screw conveyors",
pages = "264-255",
volume = "336",
doi = "10.1016/j.powtec.2018.06.009"
}
Pezo, M., Pezo, L., Jovanović, A. P., Terzić, A., Andrić, L., Lončar, B.,& Kojić, P.. (2018). Discrete element model of particle transport and premixing action in modified screw conveyors. in Powder Technology
Elsevier Science Bv, Amsterdam., 336, 255-264.
https://doi.org/10.1016/j.powtec.2018.06.009
Pezo M, Pezo L, Jovanović AP, Terzić A, Andrić L, Lončar B, Kojić P. Discrete element model of particle transport and premixing action in modified screw conveyors. in Powder Technology. 2018;336:255-264.
doi:10.1016/j.powtec.2018.06.009 .
Pezo, Milada, Pezo, Lato, Jovanović, Aca P., Terzić, Anja, Andrić, Ljubiša, Lončar, Biljana, Kojić, Predrag, "Discrete element model of particle transport and premixing action in modified screw conveyors" in Powder Technology, 336 (2018):255-264,
https://doi.org/10.1016/j.powtec.2018.06.009 . .
22
7
27

The effect of mechano-chemical activation and surface treatment of limestone filler on the properties of construction composites

Terzić, Anja; Radulović, Dragan; Pezo, Lato; Andrić, Ljubiša; Miličić, Ljiljana; Stojanović, Jovica; Grigorova, Irena

(Elsevier Sci Ltd, Oxford, 2017)

TY  - JOUR
AU  - Terzić, Anja
AU  - Radulović, Dragan
AU  - Pezo, Lato
AU  - Andrić, Ljubiša
AU  - Miličić, Ljiljana
AU  - Stojanović, Jovica
AU  - Grigorova, Irena
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/322
AB  - The effect of the combined actions of milling and hydrophobization procedures applied in construction composites synthesis was investigated. The mortars were prepared with cement (CEM I 42.5) and calcite aggregate complying the standard 1:3 mix ratio. The limestone filler (10 wt%) was added to the mixture upon its mechano-chemical activation in an ultra-centrifugal mill. The activation variables (milling time, rotor velocity, sieve mesh size) were altered to achieve the optimal quality of the powder. The treatment was optimized via chemometric tools. The r(2) values (0.955-0.998) of second order polynomial models accurately predicted the output and the Standard score analysis chose the optimal activation parameters: 4.25 min; 48.58 m/s and 80 gm sieve. The selected filler and all three aggregate fractions were coated with stearic acid via dry procedure. The mortar mixes, prepared with uncoated (M1) and coated (M2) aggregate and filler, were cured for a period of 28 days during which compressive strength and water absorption were monitored. The dimensional changes in mortars were estimated via TMA dilatometer measurements. Thermo-analytical methods (DTA/TGA) were applied in the thermal behavior analysis. Mineralogical and morphological changes in the structure of hardened composite were detected by XRD and SEM, respectively. Limestone aggregate led to lower final compressive strengths in mortar, but it produced an infinitesimally small shrinkage at 1000 degrees C. The hydrophobization via stearic acid initiated the decrease in water absorption and formation of needle-like micro-network that filled structural voids reducing open porosity. The assessment of the effects of limestone utilization as a filler and as an aggregate on the mortar performances confirmed that this novel water-repellent composite is applicable in structural design.
PB  - Elsevier Sci Ltd, Oxford
T2  - Composites Part B-Engineering
T1  - The effect of mechano-chemical activation and surface treatment of limestone filler on the properties of construction composites
EP  - 73
SP  - 61
VL  - 117
DO  - 10.1016/j.compositesb.2017.02.041
ER  - 
@article{
author = "Terzić, Anja and Radulović, Dragan and Pezo, Lato and Andrić, Ljubiša and Miličić, Ljiljana and Stojanović, Jovica and Grigorova, Irena",
year = "2017",
abstract = "The effect of the combined actions of milling and hydrophobization procedures applied in construction composites synthesis was investigated. The mortars were prepared with cement (CEM I 42.5) and calcite aggregate complying the standard 1:3 mix ratio. The limestone filler (10 wt%) was added to the mixture upon its mechano-chemical activation in an ultra-centrifugal mill. The activation variables (milling time, rotor velocity, sieve mesh size) were altered to achieve the optimal quality of the powder. The treatment was optimized via chemometric tools. The r(2) values (0.955-0.998) of second order polynomial models accurately predicted the output and the Standard score analysis chose the optimal activation parameters: 4.25 min; 48.58 m/s and 80 gm sieve. The selected filler and all three aggregate fractions were coated with stearic acid via dry procedure. The mortar mixes, prepared with uncoated (M1) and coated (M2) aggregate and filler, were cured for a period of 28 days during which compressive strength and water absorption were monitored. The dimensional changes in mortars were estimated via TMA dilatometer measurements. Thermo-analytical methods (DTA/TGA) were applied in the thermal behavior analysis. Mineralogical and morphological changes in the structure of hardened composite were detected by XRD and SEM, respectively. Limestone aggregate led to lower final compressive strengths in mortar, but it produced an infinitesimally small shrinkage at 1000 degrees C. The hydrophobization via stearic acid initiated the decrease in water absorption and formation of needle-like micro-network that filled structural voids reducing open porosity. The assessment of the effects of limestone utilization as a filler and as an aggregate on the mortar performances confirmed that this novel water-repellent composite is applicable in structural design.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Composites Part B-Engineering",
title = "The effect of mechano-chemical activation and surface treatment of limestone filler on the properties of construction composites",
pages = "73-61",
volume = "117",
doi = "10.1016/j.compositesb.2017.02.041"
}
Terzić, A., Radulović, D., Pezo, L., Andrić, L., Miličić, L., Stojanović, J.,& Grigorova, I.. (2017). The effect of mechano-chemical activation and surface treatment of limestone filler on the properties of construction composites. in Composites Part B-Engineering
Elsevier Sci Ltd, Oxford., 117, 61-73.
https://doi.org/10.1016/j.compositesb.2017.02.041
Terzić A, Radulović D, Pezo L, Andrić L, Miličić L, Stojanović J, Grigorova I. The effect of mechano-chemical activation and surface treatment of limestone filler on the properties of construction composites. in Composites Part B-Engineering. 2017;117:61-73.
doi:10.1016/j.compositesb.2017.02.041 .
Terzić, Anja, Radulović, Dragan, Pezo, Lato, Andrić, Ljubiša, Miličić, Ljiljana, Stojanović, Jovica, Grigorova, Irena, "The effect of mechano-chemical activation and surface treatment of limestone filler on the properties of construction composites" in Composites Part B-Engineering, 117 (2017):61-73,
https://doi.org/10.1016/j.compositesb.2017.02.041 . .
11
9
12

Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials

Terzić, Anja; Obradović, Nina; Stojanović, Jovica; Pavlović, Vladimir; Andrić, Ljubiša; Olcan, Dragan; Đorđević, Antonije

(Elsevier Sci Ltd, Oxford, 2017)

TY  - JOUR
AU  - Terzić, Anja
AU  - Obradović, Nina
AU  - Stojanović, Jovica
AU  - Pavlović, Vladimir
AU  - Andrić, Ljubiša
AU  - Olcan, Dragan
AU  - Đorđević, Antonije
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/314
AB  - The focus of the study was on providing insights into interconnections between sintering and development of the crystalline microstructure, and consequently variations in dielectric behavior of four steatites fabricated from a low-cost raw material, i.e. talc. The changes, induced by the alternations of the binders (bentonite, kaolin clay) and fluxing agents (BaCO3, feldspar), were monitored in the temperature range 1000 degrees to 1250 degrees C in which complete densification and re-crystallization of the investigated structures were accomplished. The critical points in the synthesis of steatite materials were assessed by instrumental analyses. Crystallinity changes and mineral phase transition during sintering were monitored by X-ray diffraction technique. Microstructural visualization of the samples and the spatial arrangements of individual chemical elements were achieved via scanning electron microscopy accompanied with EDS mapping. The thermal stability was observed on the green mixtures using differential thermal and thermo gravimetric analyses. Electrical measurements recorded variations of the dielectric constant (epsilon(r)) and loss tangent (tan delta) as a function of the sintering temperature. The investigation highlighted critical design points, as well as the optimal combinations of the raw materials for production of the steatite ceramics for advanced electrical engineering applications.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials
EP  - 13275
IS  - 16
SP  - 13264
VL  - 43
DO  - 10.1016/j.ceramint.2017.07.024
ER  - 
@article{
author = "Terzić, Anja and Obradović, Nina and Stojanović, Jovica and Pavlović, Vladimir and Andrić, Ljubiša and Olcan, Dragan and Đorđević, Antonije",
year = "2017",
abstract = "The focus of the study was on providing insights into interconnections between sintering and development of the crystalline microstructure, and consequently variations in dielectric behavior of four steatites fabricated from a low-cost raw material, i.e. talc. The changes, induced by the alternations of the binders (bentonite, kaolin clay) and fluxing agents (BaCO3, feldspar), were monitored in the temperature range 1000 degrees to 1250 degrees C in which complete densification and re-crystallization of the investigated structures were accomplished. The critical points in the synthesis of steatite materials were assessed by instrumental analyses. Crystallinity changes and mineral phase transition during sintering were monitored by X-ray diffraction technique. Microstructural visualization of the samples and the spatial arrangements of individual chemical elements were achieved via scanning electron microscopy accompanied with EDS mapping. The thermal stability was observed on the green mixtures using differential thermal and thermo gravimetric analyses. Electrical measurements recorded variations of the dielectric constant (epsilon(r)) and loss tangent (tan delta) as a function of the sintering temperature. The investigation highlighted critical design points, as well as the optimal combinations of the raw materials for production of the steatite ceramics for advanced electrical engineering applications.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials",
pages = "13275-13264",
number = "16",
volume = "43",
doi = "10.1016/j.ceramint.2017.07.024"
}
Terzić, A., Obradović, N., Stojanović, J., Pavlović, V., Andrić, L., Olcan, D.,& Đorđević, A.. (2017). Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials. in Ceramics International
Elsevier Sci Ltd, Oxford., 43(16), 13264-13275.
https://doi.org/10.1016/j.ceramint.2017.07.024
Terzić A, Obradović N, Stojanović J, Pavlović V, Andrić L, Olcan D, Đorđević A. Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials. in Ceramics International. 2017;43(16):13264-13275.
doi:10.1016/j.ceramint.2017.07.024 .
Terzić, Anja, Obradović, Nina, Stojanović, Jovica, Pavlović, Vladimir, Andrić, Ljubiša, Olcan, Dragan, Đorđević, Antonije, "Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials" in Ceramics International, 43, no. 16 (2017):13264-13275,
https://doi.org/10.1016/j.ceramint.2017.07.024 . .
10
4
10

Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling

Terzić, Anja; Pezo, Lato; Andrić, Ljubiša; Pavlović, Vladimir; Mitić, Vojislav

(Elsevier Sci Ltd, Oxford, 2017)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Andrić, Ljubiša
AU  - Pavlović, Vladimir
AU  - Mitić, Vojislav
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/307
AB  - The properties of seven montmorillonite-rich bentonites of different geological origin were investigated prior and subsequent to mechano-chemical processing in an ultra-centrifugal mill. The objective of the experiment was altering the bentonite types and activation parameters in order to determine the optimal milling conditions that produce material which is physico-mechanically and microstructurally applicable as a binder replacement and sorbent in the construction composites. The efficiency of bentonite activation was assessed by chemometrics and Artificial neural networks mathematical modeling. Principal component analysis and analysis of variance were used in the observation of the influence of input variables (bentonite chemical composition) and process parameters (milling duration, rotor velocity) on the product characteristics: density, specific surface area, grain size and distribution, cation exchange capacity, melting point, compressive strength, shrinkage and porosity. When the ANN models for the observed responses, related to predicted bentonite characteristics and quality, were compared to experimental results, they correctly predicted the responses. The processed data also adequately fitted to the regression second order polynomial models. The SOP models, which showed r(2) values from 0.357 to 0.948, and were able to predict the observed responses in a wide range of processing parameters, while ANN models performed high prediction accuracy (0.776-0.901) and can be considered as precise for response variables prediction. The combination of the conducted mathematical analyses showed that that increase/decrease in output values was stabilized after 30 min of activation. Mathematically attained interpretations were correlated with the results of the instrumental analyses (XRD, DTA/TG, SEM) to confirm the adoption of B6 bentonite as a preferable type and 30 min as an optimal milling time for acquiring quality of clay powder that will be used in structural and thermal applications.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling
EP  - 2562
IS  - 2
SP  - 2549
VL  - 43
DO  - 10.1016/j.ceramint.2016.11.058
ER  - 
@article{
author = "Terzić, Anja and Pezo, Lato and Andrić, Ljubiša and Pavlović, Vladimir and Mitić, Vojislav",
year = "2017",
abstract = "The properties of seven montmorillonite-rich bentonites of different geological origin were investigated prior and subsequent to mechano-chemical processing in an ultra-centrifugal mill. The objective of the experiment was altering the bentonite types and activation parameters in order to determine the optimal milling conditions that produce material which is physico-mechanically and microstructurally applicable as a binder replacement and sorbent in the construction composites. The efficiency of bentonite activation was assessed by chemometrics and Artificial neural networks mathematical modeling. Principal component analysis and analysis of variance were used in the observation of the influence of input variables (bentonite chemical composition) and process parameters (milling duration, rotor velocity) on the product characteristics: density, specific surface area, grain size and distribution, cation exchange capacity, melting point, compressive strength, shrinkage and porosity. When the ANN models for the observed responses, related to predicted bentonite characteristics and quality, were compared to experimental results, they correctly predicted the responses. The processed data also adequately fitted to the regression second order polynomial models. The SOP models, which showed r(2) values from 0.357 to 0.948, and were able to predict the observed responses in a wide range of processing parameters, while ANN models performed high prediction accuracy (0.776-0.901) and can be considered as precise for response variables prediction. The combination of the conducted mathematical analyses showed that that increase/decrease in output values was stabilized after 30 min of activation. Mathematically attained interpretations were correlated with the results of the instrumental analyses (XRD, DTA/TG, SEM) to confirm the adoption of B6 bentonite as a preferable type and 30 min as an optimal milling time for acquiring quality of clay powder that will be used in structural and thermal applications.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling",
pages = "2562-2549",
number = "2",
volume = "43",
doi = "10.1016/j.ceramint.2016.11.058"
}
Terzić, A., Pezo, L., Andrić, L., Pavlović, V.,& Mitić, V.. (2017). Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling. in Ceramics International
Elsevier Sci Ltd, Oxford., 43(2), 2549-2562.
https://doi.org/10.1016/j.ceramint.2016.11.058
Terzić A, Pezo L, Andrić L, Pavlović V, Mitić V. Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling. in Ceramics International. 2017;43(2):2549-2562.
doi:10.1016/j.ceramint.2016.11.058 .
Terzić, Anja, Pezo, Lato, Andrić, Ljubiša, Pavlović, Vladimir, Mitić, Vojislav, "Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling" in Ceramics International, 43, no. 2 (2017):2549-2562,
https://doi.org/10.1016/j.ceramint.2016.11.058 . .
15
8
17

Chemometric Analysis of Alternations in Coal Ash Quality Induced by Application of Different Mechano-chemical Processing Parameters

Terzić, Anja; Pezo, Lato; Andrić, Ljubiša

(Međunarodni Institut za nauku o sinterovanju, Beograd, 2017)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Andrić, Ljubiša
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/310
AB  - The coal fly ash mechano-chemical activation conducted via high energy ultra-centrifugal mill was optimized using mathematical and statistical tools. The aim of the investigation was to accent the merits of alternations in ash processing schemes with a referral regarding the enhancement of the ash reactivity that will lead to its higher volume utilization as a cement replacement in concrete design. The impact of the processing parameters sets (number of rotor revolutions, current intensity, activation period, circumferential rotor speed, mill capacity) on the on the product's quality factors (grain size distribution, average grain size, micronization level, agglomeration tendency, specific surface area) was assessed via Response surface method, Standard score analysis and Principal component analysis in order to obtain the most favorable output. Developed models were able to meticulously predict quality parameters in an extensive range of processing parameters. The calculated r(2) values were in the range of 0.846-0.999. The optimal ash sample, that reached the Standard Score as high as 0.93, was produced using a set of processing parameters appropriate to experimental sequence with applied 120 mu m sieve mesh. The microstructural characteristics were assessed using image-processing values and histogram plots of the activated fly ash SEM images.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Chemometric Analysis of Alternations in Coal Ash Quality Induced by Application of Different Mechano-chemical Processing Parameters
EP  - 397
IS  - 4
SP  - 381
VL  - 49
DO  - 10.2298/SOS1704381T
ER  - 
@article{
author = "Terzić, Anja and Pezo, Lato and Andrić, Ljubiša",
year = "2017",
abstract = "The coal fly ash mechano-chemical activation conducted via high energy ultra-centrifugal mill was optimized using mathematical and statistical tools. The aim of the investigation was to accent the merits of alternations in ash processing schemes with a referral regarding the enhancement of the ash reactivity that will lead to its higher volume utilization as a cement replacement in concrete design. The impact of the processing parameters sets (number of rotor revolutions, current intensity, activation period, circumferential rotor speed, mill capacity) on the on the product's quality factors (grain size distribution, average grain size, micronization level, agglomeration tendency, specific surface area) was assessed via Response surface method, Standard score analysis and Principal component analysis in order to obtain the most favorable output. Developed models were able to meticulously predict quality parameters in an extensive range of processing parameters. The calculated r(2) values were in the range of 0.846-0.999. The optimal ash sample, that reached the Standard Score as high as 0.93, was produced using a set of processing parameters appropriate to experimental sequence with applied 120 mu m sieve mesh. The microstructural characteristics were assessed using image-processing values and histogram plots of the activated fly ash SEM images.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Chemometric Analysis of Alternations in Coal Ash Quality Induced by Application of Different Mechano-chemical Processing Parameters",
pages = "397-381",
number = "4",
volume = "49",
doi = "10.2298/SOS1704381T"
}
Terzić, A., Pezo, L.,& Andrić, L.. (2017). Chemometric Analysis of Alternations in Coal Ash Quality Induced by Application of Different Mechano-chemical Processing Parameters. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 49(4), 381-397.
https://doi.org/10.2298/SOS1704381T
Terzić A, Pezo L, Andrić L. Chemometric Analysis of Alternations in Coal Ash Quality Induced by Application of Different Mechano-chemical Processing Parameters. in Science of Sintering. 2017;49(4):381-397.
doi:10.2298/SOS1704381T .
Terzić, Anja, Pezo, Lato, Andrić, Ljubiša, "Chemometric Analysis of Alternations in Coal Ash Quality Induced by Application of Different Mechano-chemical Processing Parameters" in Science of Sintering, 49, no. 4 (2017):381-397,
https://doi.org/10.2298/SOS1704381T . .
4
2

Chemometric assessment of mechano-chemically activated zeolites for application in the construction composites

Terzić, Anja; Pezo, Lato; Andrić, Ljubiša

(Elsevier Sci Ltd, Oxford, 2017)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Andrić, Ljubiša
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/306
AB  - Natural zeolites of clinoptilolite type from seven deposits were submitted to mechano-chemical activation in a Retsch ultra -centrifugal mill. The zeolite types and activation parameters were altered during the experiment with an aim to determine the optimal combination that would produce powder with adequate physico-chemical and microstructural properties for application as a binder replacement and an ion -exchanger in the construction composites. The effects of input variables (chemical composition of the samples) and process parameters (the rotor velocity and the activation period) on the efficiency of zeolite activation were investigated in terms of dependent parameters such as: specific surface area, grain size distribution, cation exchange capacity, melting point, compression strength, shrinking, water absorption and apparent porosity. Cluster analysis, Principal component analysis and Standard score analysis were applied in the assessment of the acquired product quality. Artificial neural networks (ANN) were developed in mathematical modeling of observed responses. Subsequently the ANN was compared to experimental results and the developed second order polynomial models. Developed models showed r(2) values in the 0.822-0.998 range, meaning that they were able to predict the observed responses in a wide range of processing parameters. ANN models performed high prediction accuracy (0.975-0.993) and can be considered as precise and very useful for response variables prediction. The combination of the conducted mathematical analyses isolated Z5 zeolite as a preferable type, and 20000 rpm and 30 min as an optimal activation set of parameters. Mathematically derived conclusions were confirmed by results of instrumental analyses (XRD, DTA/TG, SEM).
PB  - Elsevier Sci Ltd, Oxford
T2  - Composites Part B-Engineering
T1  - Chemometric assessment of mechano-chemically activated zeolites for application in the construction composites
EP  - 44
SP  - 30
VL  - 109
DO  - 10.1016/j.compositesb.2016.10.040
ER  - 
@article{
author = "Terzić, Anja and Pezo, Lato and Andrić, Ljubiša",
year = "2017",
abstract = "Natural zeolites of clinoptilolite type from seven deposits were submitted to mechano-chemical activation in a Retsch ultra -centrifugal mill. The zeolite types and activation parameters were altered during the experiment with an aim to determine the optimal combination that would produce powder with adequate physico-chemical and microstructural properties for application as a binder replacement and an ion -exchanger in the construction composites. The effects of input variables (chemical composition of the samples) and process parameters (the rotor velocity and the activation period) on the efficiency of zeolite activation were investigated in terms of dependent parameters such as: specific surface area, grain size distribution, cation exchange capacity, melting point, compression strength, shrinking, water absorption and apparent porosity. Cluster analysis, Principal component analysis and Standard score analysis were applied in the assessment of the acquired product quality. Artificial neural networks (ANN) were developed in mathematical modeling of observed responses. Subsequently the ANN was compared to experimental results and the developed second order polynomial models. Developed models showed r(2) values in the 0.822-0.998 range, meaning that they were able to predict the observed responses in a wide range of processing parameters. ANN models performed high prediction accuracy (0.975-0.993) and can be considered as precise and very useful for response variables prediction. The combination of the conducted mathematical analyses isolated Z5 zeolite as a preferable type, and 20000 rpm and 30 min as an optimal activation set of parameters. Mathematically derived conclusions were confirmed by results of instrumental analyses (XRD, DTA/TG, SEM).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Composites Part B-Engineering",
title = "Chemometric assessment of mechano-chemically activated zeolites for application in the construction composites",
pages = "44-30",
volume = "109",
doi = "10.1016/j.compositesb.2016.10.040"
}
Terzić, A., Pezo, L.,& Andrić, L.. (2017). Chemometric assessment of mechano-chemically activated zeolites for application in the construction composites. in Composites Part B-Engineering
Elsevier Sci Ltd, Oxford., 109, 30-44.
https://doi.org/10.1016/j.compositesb.2016.10.040
Terzić A, Pezo L, Andrić L. Chemometric assessment of mechano-chemically activated zeolites for application in the construction composites. in Composites Part B-Engineering. 2017;109:30-44.
doi:10.1016/j.compositesb.2016.10.040 .
Terzić, Anja, Pezo, Lato, Andrić, Ljubiša, "Chemometric assessment of mechano-chemically activated zeolites for application in the construction composites" in Composites Part B-Engineering, 109 (2017):30-44,
https://doi.org/10.1016/j.compositesb.2016.10.040 . .
11
8
12

A Kinetic Study of Limestone Dry Micronization in an Ultra-Centrifugal Mill with Peripheral Comminuting Path

Radulović, Dragan; Božović, D.; Terzić, Anja; Trumić, M. S.; Simić, Vladimir; Andrić, Ljubiša

(Goller Verlag Gmbh, Baden Baden, 2017)

TY  - JOUR
AU  - Radulović, Dragan
AU  - Božović, D.
AU  - Terzić, Anja
AU  - Trumić, M. S.
AU  - Simić, Vladimir
AU  - Andrić, Ljubiša
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/323
AB  - Because of its physico-mechanical and physico-chemical characteristics, fine-ground (i.e. micronized) limestone is widely applied in the production of new materials. Limestone can be used as a filler, coating and/or powder in ceramic composites. The effect of its fine micronization depends on the type of equipment used and on the disintegration process. In this study, the emphasis was placed on investigation of the kinetics of the dry micronization milling of limestone in a state-of-the-art ultra-centrifugal mill with a peripheral comminuting path. The efficiency of the ultra-centrifugal mill with a peripheral comminuting path was determined based on a detailed investigation of the limestone dry micronization, which satisfied all the requirements for technological parameters as well as for micronized product parameters. On the basis of the investigation of these parameters and theory of dry micronization conducted in a state-of-the-art mill with use of advanced instrumental techniques for determination and observation of the most significant physical and chemical characteristics, a kinetics model was developed to serve as the basis for quick and effective determination of micronization quality and efficiency. In this paper, the results of grinding in a Retsch ZM-1 ultra-centrifugal mill were analyzed in order to optimize and automate the process of ultrafine micronization.
PB  - Goller Verlag Gmbh, Baden Baden
T2  - Journal of Ceramic Science and Technology
T1  - A Kinetic Study of Limestone Dry Micronization in an Ultra-Centrifugal Mill with Peripheral Comminuting Path
EP  - 304
IS  - 2
SP  - 295
VL  - 8
DO  - 10.4416/JCST2017-00022
ER  - 
@article{
author = "Radulović, Dragan and Božović, D. and Terzić, Anja and Trumić, M. S. and Simić, Vladimir and Andrić, Ljubiša",
year = "2017",
abstract = "Because of its physico-mechanical and physico-chemical characteristics, fine-ground (i.e. micronized) limestone is widely applied in the production of new materials. Limestone can be used as a filler, coating and/or powder in ceramic composites. The effect of its fine micronization depends on the type of equipment used and on the disintegration process. In this study, the emphasis was placed on investigation of the kinetics of the dry micronization milling of limestone in a state-of-the-art ultra-centrifugal mill with a peripheral comminuting path. The efficiency of the ultra-centrifugal mill with a peripheral comminuting path was determined based on a detailed investigation of the limestone dry micronization, which satisfied all the requirements for technological parameters as well as for micronized product parameters. On the basis of the investigation of these parameters and theory of dry micronization conducted in a state-of-the-art mill with use of advanced instrumental techniques for determination and observation of the most significant physical and chemical characteristics, a kinetics model was developed to serve as the basis for quick and effective determination of micronization quality and efficiency. In this paper, the results of grinding in a Retsch ZM-1 ultra-centrifugal mill were analyzed in order to optimize and automate the process of ultrafine micronization.",
publisher = "Goller Verlag Gmbh, Baden Baden",
journal = "Journal of Ceramic Science and Technology",
title = "A Kinetic Study of Limestone Dry Micronization in an Ultra-Centrifugal Mill with Peripheral Comminuting Path",
pages = "304-295",
number = "2",
volume = "8",
doi = "10.4416/JCST2017-00022"
}
Radulović, D., Božović, D., Terzić, A., Trumić, M. S., Simić, V.,& Andrić, L.. (2017). A Kinetic Study of Limestone Dry Micronization in an Ultra-Centrifugal Mill with Peripheral Comminuting Path. in Journal of Ceramic Science and Technology
Goller Verlag Gmbh, Baden Baden., 8(2), 295-304.
https://doi.org/10.4416/JCST2017-00022
Radulović D, Božović D, Terzić A, Trumić MS, Simić V, Andrić L. A Kinetic Study of Limestone Dry Micronization in an Ultra-Centrifugal Mill with Peripheral Comminuting Path. in Journal of Ceramic Science and Technology. 2017;8(2):295-304.
doi:10.4416/JCST2017-00022 .
Radulović, Dragan, Božović, D., Terzić, Anja, Trumić, M. S., Simić, Vladimir, Andrić, Ljubiša, "A Kinetic Study of Limestone Dry Micronization in an Ultra-Centrifugal Mill with Peripheral Comminuting Path" in Journal of Ceramic Science and Technology, 8, no. 2 (2017):295-304,
https://doi.org/10.4416/JCST2017-00022 . .

The Chemometric Study of Limestone Physico-chemical Properties and Thermal Behavior for Application in Construction Composites

Radulović, Dragan; Terzić, Anja; Pezo, Lato; Andrić, Ljubiša; Grigorova, Irena

(Međunarodni Institut za nauku o sinterovanju, Beograd, 2017)

TY  - JOUR
AU  - Radulović, Dragan
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Andrić, Ljubiša
AU  - Grigorova, Irena
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/309
AB  - The limestone, as an economically sustainable and easily available basic raw material, is frequently utilized in the building industry for resolving of the environmental protection issues. The limestone is incorporated in a cementitious system either by grinding with cement clinker, or by blending with the binder during concrete production. The employing of powdery limestone as partial cement replacement gives the construction composites with properties comparable to that of conventional concrete. The study of limestone thermal behavior and its chemistry is crucial for the prognosis of the designed composites properties. In this work, the instrumental techniques (atomic emission spectroscopy, differential thermal and thermo-gravimetric analysis, Fourier transform infrared spectroscopy) and the Principal component analysis were employed to discriminate and classify 22 limestone types. The PCA statistical method, as a means of spectra and experimental data fingerprinting, grouped the samples in a multi-dimensional factor space producing four graphical prognosis - one for each instrumental method. DTA/TG peak values varied the most in a short range between 830-870 degrees C, while FTIR spectra showed the highest diversity in the 867-887 cm(-1) and 1237-1647 cm(-1) ranges. This research was governed by an idea to reveal whether it is possible to differentiate various limestone types and to predict the possibility of their employment in construction composites on the basis of the results of instrumental and mathematical analyses.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - The Chemometric Study of Limestone Physico-chemical Properties and Thermal Behavior for Application in Construction Composites
EP  - 261
IS  - 3
SP  - 247
VL  - 49
DO  - 10.2298/SOS1703247R
ER  - 
@article{
author = "Radulović, Dragan and Terzić, Anja and Pezo, Lato and Andrić, Ljubiša and Grigorova, Irena",
year = "2017",
abstract = "The limestone, as an economically sustainable and easily available basic raw material, is frequently utilized in the building industry for resolving of the environmental protection issues. The limestone is incorporated in a cementitious system either by grinding with cement clinker, or by blending with the binder during concrete production. The employing of powdery limestone as partial cement replacement gives the construction composites with properties comparable to that of conventional concrete. The study of limestone thermal behavior and its chemistry is crucial for the prognosis of the designed composites properties. In this work, the instrumental techniques (atomic emission spectroscopy, differential thermal and thermo-gravimetric analysis, Fourier transform infrared spectroscopy) and the Principal component analysis were employed to discriminate and classify 22 limestone types. The PCA statistical method, as a means of spectra and experimental data fingerprinting, grouped the samples in a multi-dimensional factor space producing four graphical prognosis - one for each instrumental method. DTA/TG peak values varied the most in a short range between 830-870 degrees C, while FTIR spectra showed the highest diversity in the 867-887 cm(-1) and 1237-1647 cm(-1) ranges. This research was governed by an idea to reveal whether it is possible to differentiate various limestone types and to predict the possibility of their employment in construction composites on the basis of the results of instrumental and mathematical analyses.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "The Chemometric Study of Limestone Physico-chemical Properties and Thermal Behavior for Application in Construction Composites",
pages = "261-247",
number = "3",
volume = "49",
doi = "10.2298/SOS1703247R"
}
Radulović, D., Terzić, A., Pezo, L., Andrić, L.,& Grigorova, I.. (2017). The Chemometric Study of Limestone Physico-chemical Properties and Thermal Behavior for Application in Construction Composites. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 49(3), 247-261.
https://doi.org/10.2298/SOS1703247R
Radulović D, Terzić A, Pezo L, Andrić L, Grigorova I. The Chemometric Study of Limestone Physico-chemical Properties and Thermal Behavior for Application in Construction Composites. in Science of Sintering. 2017;49(3):247-261.
doi:10.2298/SOS1703247R .
Radulović, Dragan, Terzić, Anja, Pezo, Lato, Andrić, Ljubiša, Grigorova, Irena, "The Chemometric Study of Limestone Physico-chemical Properties and Thermal Behavior for Application in Construction Composites" in Science of Sintering, 49, no. 3 (2017):247-261,
https://doi.org/10.2298/SOS1703247R . .
6
5
7

Effects of mechanical activation on the parameters of talc quality for ceramics production - Chemometric approach

Terzić, Anja; Pezo, Lato; Andrić, Ljubiša; Arsenović, Milica

(Elsevier Sci Ltd, Oxford, 2015)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Andrić, Ljubiša
AU  - Arsenović, Milica
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/270
AB  - Talc is broadly used in the ceramic materials industry, either as a basic raw material, or as filler, due to its chemical inertia, fragmentation proneness, thermal stability, and refractoriness. The mechanical activation is frequently employed in the direct enhancement of talc properties, and thereby in the design of talc based composites with advanced performances. The differences in the set of the process parameters measured before and after talc activation via ultra-centrifugal mill Retsch ZM-1, and their influence on the grain-size distribution related characteristics have been investigated. The mechanical treatments are energetically unsustainable procedures, therefore the talc activation was optimized on basis of assessment of the process variables (number of rotor revolutions, current intensity, activation period, circumferential rotor speed and mill capacity) effect on the final quality of product parameters (mesh sizes, cumulative oversizes, average grain size, level of micronization kinetics, mesh size appropriate to 95% micronized product cumulative undersize and specific surface area). The activated product parameters in all experimental sequences were obtained by the analytical procedure based on Rosin-Rammler-Sperling equation. Response surface method, standard score analysis and principal component analysis were used as a means of the optimization. Developed models showed r(2) values in the range of 0.714-0.908 and they were able to accurately predict quality parameters in a wide range of process parameters. Standard score analysis highlighted that the optimal sample was obtained using sieve mesh of 120 mu m set of processing parameters (SS = 1.0). Multiple comparison tests revealed that the optimal variation in the processing parameters could reduce the negative effect of talc samples inherent properties on the final score and improve the activation procedure energetic and economic sustainability.
PB  - Elsevier Sci Ltd, Oxford
T2  - Composites Part B-Engineering
T1  - Effects of mechanical activation on the parameters of talc quality for ceramics production - Chemometric approach
EP  - 666
SP  - 660
VL  - 79
DO  - 10.1016/j.compositesb.2015.05.022
ER  - 
@article{
author = "Terzić, Anja and Pezo, Lato and Andrić, Ljubiša and Arsenović, Milica",
year = "2015",
abstract = "Talc is broadly used in the ceramic materials industry, either as a basic raw material, or as filler, due to its chemical inertia, fragmentation proneness, thermal stability, and refractoriness. The mechanical activation is frequently employed in the direct enhancement of talc properties, and thereby in the design of talc based composites with advanced performances. The differences in the set of the process parameters measured before and after talc activation via ultra-centrifugal mill Retsch ZM-1, and their influence on the grain-size distribution related characteristics have been investigated. The mechanical treatments are energetically unsustainable procedures, therefore the talc activation was optimized on basis of assessment of the process variables (number of rotor revolutions, current intensity, activation period, circumferential rotor speed and mill capacity) effect on the final quality of product parameters (mesh sizes, cumulative oversizes, average grain size, level of micronization kinetics, mesh size appropriate to 95% micronized product cumulative undersize and specific surface area). The activated product parameters in all experimental sequences were obtained by the analytical procedure based on Rosin-Rammler-Sperling equation. Response surface method, standard score analysis and principal component analysis were used as a means of the optimization. Developed models showed r(2) values in the range of 0.714-0.908 and they were able to accurately predict quality parameters in a wide range of process parameters. Standard score analysis highlighted that the optimal sample was obtained using sieve mesh of 120 mu m set of processing parameters (SS = 1.0). Multiple comparison tests revealed that the optimal variation in the processing parameters could reduce the negative effect of talc samples inherent properties on the final score and improve the activation procedure energetic and economic sustainability.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Composites Part B-Engineering",
title = "Effects of mechanical activation on the parameters of talc quality for ceramics production - Chemometric approach",
pages = "666-660",
volume = "79",
doi = "10.1016/j.compositesb.2015.05.022"
}
Terzić, A., Pezo, L., Andrić, L.,& Arsenović, M.. (2015). Effects of mechanical activation on the parameters of talc quality for ceramics production - Chemometric approach. in Composites Part B-Engineering
Elsevier Sci Ltd, Oxford., 79, 660-666.
https://doi.org/10.1016/j.compositesb.2015.05.022
Terzić A, Pezo L, Andrić L, Arsenović M. Effects of mechanical activation on the parameters of talc quality for ceramics production - Chemometric approach. in Composites Part B-Engineering. 2015;79:660-666.
doi:10.1016/j.compositesb.2015.05.022 .
Terzić, Anja, Pezo, Lato, Andrić, Ljubiša, Arsenović, Milica, "Effects of mechanical activation on the parameters of talc quality for ceramics production - Chemometric approach" in Composites Part B-Engineering, 79 (2015):660-666,
https://doi.org/10.1016/j.compositesb.2015.05.022 . .
15
14
16

Energy transfer and conversion recorded on mechanically activated fly ash grains

Terzić, Anja; Andrić, Ljubiša; Miličić, Ljiljana; Radojević, Zagorka

(ModTech Publishing House, 2015)

TY  - JOUR
AU  - Terzić, Anja
AU  - Andrić, Ljubiša
AU  - Miličić, Ljiljana
AU  - Radojević, Zagorka
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/263
AB  - The fly ash activation through mechanical milling is ussualy applied to improve the ash properties in order to get composite materials with higher characteristics. The activation technology based on mechanical energy action applied on treated materials and is conducted by ultra-fine milling. In order to increase the reactivity of lignite coal fly ash this paper focuses on optimization of mechanical activation period. Also, the influence of the ash activation parameters on the grain-size distribution related characteristics was studied during this research. The ash grain inertia measurement through automatic grain counter (AGC) was performed. Due this mechanically activated grains are the most convenient mineral form for measurement of grain inertia since energy change that occurs in the mill material system is recorded by them. The ash grains energy and properties could be changed by mechanical forces. The ash was thoroughly analyzed, particularly in its activated state, primarily by means of the X-ray diffraction method for a reliable identification of the crystal phases and changes in the crystallinity, followed by comparison of the SEM microphotographs of its initial and activated state.
PB  - ModTech Publishing House
T2  - International Journal of Modern Manufacturing Technologies
T1  - Energy transfer and conversion recorded on mechanically activated fly ash grains
EP  - 80
IS  - 1
SP  - 75
VL  - 7
UR  - https://hdl.handle.net/21.15107/rcub_rims_263
ER  - 
@article{
author = "Terzić, Anja and Andrić, Ljubiša and Miličić, Ljiljana and Radojević, Zagorka",
year = "2015",
abstract = "The fly ash activation through mechanical milling is ussualy applied to improve the ash properties in order to get composite materials with higher characteristics. The activation technology based on mechanical energy action applied on treated materials and is conducted by ultra-fine milling. In order to increase the reactivity of lignite coal fly ash this paper focuses on optimization of mechanical activation period. Also, the influence of the ash activation parameters on the grain-size distribution related characteristics was studied during this research. The ash grain inertia measurement through automatic grain counter (AGC) was performed. Due this mechanically activated grains are the most convenient mineral form for measurement of grain inertia since energy change that occurs in the mill material system is recorded by them. The ash grains energy and properties could be changed by mechanical forces. The ash was thoroughly analyzed, particularly in its activated state, primarily by means of the X-ray diffraction method for a reliable identification of the crystal phases and changes in the crystallinity, followed by comparison of the SEM microphotographs of its initial and activated state.",
publisher = "ModTech Publishing House",
journal = "International Journal of Modern Manufacturing Technologies",
title = "Energy transfer and conversion recorded on mechanically activated fly ash grains",
pages = "80-75",
number = "1",
volume = "7",
url = "https://hdl.handle.net/21.15107/rcub_rims_263"
}
Terzić, A., Andrić, L., Miličić, L.,& Radojević, Z.. (2015). Energy transfer and conversion recorded on mechanically activated fly ash grains. in International Journal of Modern Manufacturing Technologies
ModTech Publishing House., 7(1), 75-80.
https://hdl.handle.net/21.15107/rcub_rims_263
Terzić A, Andrić L, Miličić L, Radojević Z. Energy transfer and conversion recorded on mechanically activated fly ash grains. in International Journal of Modern Manufacturing Technologies. 2015;7(1):75-80.
https://hdl.handle.net/21.15107/rcub_rims_263 .
Terzić, Anja, Andrić, Ljubiša, Miličić, Ljiljana, Radojević, Zagorka, "Energy transfer and conversion recorded on mechanically activated fly ash grains" in International Journal of Modern Manufacturing Technologies, 7, no. 1 (2015):75-80,
https://hdl.handle.net/21.15107/rcub_rims_263 .
1

Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash

Terzić, Anja; Obradović, Nina; Andrić, Ljubiša; Stojanović, Jovica; Pavlović, Vladimir

(Springer, Dordrecht, 2015)

TY  - JOUR
AU  - Terzić, Anja
AU  - Obradović, Nina
AU  - Andrić, Ljubiša
AU  - Stojanović, Jovica
AU  - Pavlović, Vladimir
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/266
AB  - The effects that the fly ash addition has on the behavior of thermally resistant corundum concrete were discussed. Experimental program implied production of two refractory composites: "referent" concrete from 20 % of high-aluminate cement and 80 % of corundum aggregate, "recycled" concrete from 10 % of high-aluminate cement, 20 % of lignite coal ash, and 70 % of corundum aggregate. The fly ash was mechanically activated by a vibratory disk mill. In the concrete matrix, the ash had a role of cement partial replacement and microfiller. The mechanical and thermal properties of the concretes were studied at temperatures ranging from ambient to 1,400 A degrees C as adopted maximum. Mechanisms of thermally induced processes were observed by differential thermal analysis at 10, 20, and 30 A degrees C min(-1) heating rates. Referent and recycled concretes showed differences in calculated activation energies. The variations in refractory concretes performances were discussed with support of scanning electron microscope imagining and X-ray diffraction results. The recycled ash concrete exhibited properties that met the requirements for the castables, which proves it suitable for use in severe conditions at high temperature and highlights the reusing principle and possibility of cleaner and economically sustainable production.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash
EP  - 1352
IS  - 2
SP  - 1339
VL  - 119
DO  - 10.1007/s10973-014-4230-4
ER  - 
@article{
author = "Terzić, Anja and Obradović, Nina and Andrić, Ljubiša and Stojanović, Jovica and Pavlović, Vladimir",
year = "2015",
abstract = "The effects that the fly ash addition has on the behavior of thermally resistant corundum concrete were discussed. Experimental program implied production of two refractory composites: "referent" concrete from 20 % of high-aluminate cement and 80 % of corundum aggregate, "recycled" concrete from 10 % of high-aluminate cement, 20 % of lignite coal ash, and 70 % of corundum aggregate. The fly ash was mechanically activated by a vibratory disk mill. In the concrete matrix, the ash had a role of cement partial replacement and microfiller. The mechanical and thermal properties of the concretes were studied at temperatures ranging from ambient to 1,400 A degrees C as adopted maximum. Mechanisms of thermally induced processes were observed by differential thermal analysis at 10, 20, and 30 A degrees C min(-1) heating rates. Referent and recycled concretes showed differences in calculated activation energies. The variations in refractory concretes performances were discussed with support of scanning electron microscope imagining and X-ray diffraction results. The recycled ash concrete exhibited properties that met the requirements for the castables, which proves it suitable for use in severe conditions at high temperature and highlights the reusing principle and possibility of cleaner and economically sustainable production.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash",
pages = "1352-1339",
number = "2",
volume = "119",
doi = "10.1007/s10973-014-4230-4"
}
Terzić, A., Obradović, N., Andrić, L., Stojanović, J.,& Pavlović, V.. (2015). Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 119(2), 1339-1352.
https://doi.org/10.1007/s10973-014-4230-4
Terzić A, Obradović N, Andrić L, Stojanović J, Pavlović V. Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash. in Journal of Thermal Analysis and Calorimetry. 2015;119(2):1339-1352.
doi:10.1007/s10973-014-4230-4 .
Terzić, Anja, Obradović, Nina, Andrić, Ljubiša, Stojanović, Jovica, Pavlović, Vladimir, "Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash" in Journal of Thermal Analysis and Calorimetry, 119, no. 2 (2015):1339-1352,
https://doi.org/10.1007/s10973-014-4230-4 . .
7
5
8

Comparison of refractory coatings based on talc, cordierite, zircon and mullite fillers for lost-foam casting

Aćimović-Pavlović, Zagorka; Terzić, Anja; Andrić, Ljubiša; Pavlović, Marko

(Inst Za Kovinske Materiale I In Tehnologie, Ljubjana, 2015)

TY  - JOUR
AU  - Aćimović-Pavlović, Zagorka
AU  - Terzić, Anja
AU  - Andrić, Ljubiša
AU  - Pavlović, Marko
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/277
AB  - This study presents the results of an investigation of high-temperature materials refractory coatings based on different refractory fillers including talc, cordierite, zircon and mullite applied in the lost-foam casting process. Design and optimization of a coating composition with controlled rheological properties and synthesis were achieved by applying different coating components, suspension agents and fillers and by altering the coating-production procedure. A morphological and microstructural analysis of the fillers was carried out with scanning electron microscopy. An X-ray diffraction analysis was applied to determine and monitor the phase-composition changes of the refractory fillers. The particle size and shape were assessed with the PC software application package OZARIA 2.5. To assess the effects of the applications of individual refractory coatings, a detailed investigation of the structural and mechanical properties of the mouldings obtained was performed. Highlight was placed on revealing and analyzing surface and volume defects present on the mouldings. Radiographic moulding tests were carried out with an X-ray device, SAIFORT type-S200. The attained results are essential for the synthesis of the refractory coatings based on high-temperature fillers and their applications in the lost-foam casting process for manufacturing the mouldings with in-advance-set properties.
PB  - Inst Za Kovinske Materiale I In Tehnologie, Ljubjana
T2  - Materiali in tehnologije
T1  - Comparison of refractory coatings based on talc, cordierite, zircon and mullite fillers for lost-foam casting
EP  - 164
IS  - 1
SP  - 157
VL  - 49
UR  - https://hdl.handle.net/21.15107/rcub_rims_277
ER  - 
@article{
author = "Aćimović-Pavlović, Zagorka and Terzić, Anja and Andrić, Ljubiša and Pavlović, Marko",
year = "2015",
abstract = "This study presents the results of an investigation of high-temperature materials refractory coatings based on different refractory fillers including talc, cordierite, zircon and mullite applied in the lost-foam casting process. Design and optimization of a coating composition with controlled rheological properties and synthesis were achieved by applying different coating components, suspension agents and fillers and by altering the coating-production procedure. A morphological and microstructural analysis of the fillers was carried out with scanning electron microscopy. An X-ray diffraction analysis was applied to determine and monitor the phase-composition changes of the refractory fillers. The particle size and shape were assessed with the PC software application package OZARIA 2.5. To assess the effects of the applications of individual refractory coatings, a detailed investigation of the structural and mechanical properties of the mouldings obtained was performed. Highlight was placed on revealing and analyzing surface and volume defects present on the mouldings. Radiographic moulding tests were carried out with an X-ray device, SAIFORT type-S200. The attained results are essential for the synthesis of the refractory coatings based on high-temperature fillers and their applications in the lost-foam casting process for manufacturing the mouldings with in-advance-set properties.",
publisher = "Inst Za Kovinske Materiale I In Tehnologie, Ljubjana",
journal = "Materiali in tehnologije",
title = "Comparison of refractory coatings based on talc, cordierite, zircon and mullite fillers for lost-foam casting",
pages = "164-157",
number = "1",
volume = "49",
url = "https://hdl.handle.net/21.15107/rcub_rims_277"
}
Aćimović-Pavlović, Z., Terzić, A., Andrić, L.,& Pavlović, M.. (2015). Comparison of refractory coatings based on talc, cordierite, zircon and mullite fillers for lost-foam casting. in Materiali in tehnologije
Inst Za Kovinske Materiale I In Tehnologie, Ljubjana., 49(1), 157-164.
https://hdl.handle.net/21.15107/rcub_rims_277
Aćimović-Pavlović Z, Terzić A, Andrić L, Pavlović M. Comparison of refractory coatings based on talc, cordierite, zircon and mullite fillers for lost-foam casting. in Materiali in tehnologije. 2015;49(1):157-164.
https://hdl.handle.net/21.15107/rcub_rims_277 .
Aćimović-Pavlović, Zagorka, Terzić, Anja, Andrić, Ljubiša, Pavlović, Marko, "Comparison of refractory coatings based on talc, cordierite, zircon and mullite fillers for lost-foam casting" in Materiali in tehnologije, 49, no. 1 (2015):157-164,
https://hdl.handle.net/21.15107/rcub_rims_277 .
1
3

Chemometric analysis of the influence of mechanical activation on the mica quality parameters

Terzić, Anja; Pezo, Lato; Andrić, Ljubiša

(Elsevier Sci Ltd, Oxford, 2015)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Andrić, Ljubiša
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/274
AB  - The differences in the set of the process parameters measured before and after mica mechanical activation and their influence on the grain size distribution related characteristics have been studied. The modification of the behavior for activated samples has been correlated to the particle size distribution effect produced by activation via an ultra centrifugal mill. The mechanical treatments are energetically and economically unsustainable procedures, therefore the mica activation was optimized on basis of assessment of the process variables effect on the final quality of product parameters. Response surface method, standard score analysis and principal component analysis were used as means of the optimization. Developed models showed r(2) values in the range of 0.816-0.988 and they were able to accurately, predict quality parameters in a wide range of processing parameters. Standard score analysis highlighted that the optimal sample was obtained using sieve mesh of 80 mu m set of processing parameters (SS=0.81). Multiple comparison tests revealed that the optimal variation in the processing parameters could reduce the negative effect of mica samples inherent properties on the final score and improve activation procedure energetic and economic sustainability.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Chemometric analysis of the influence of mechanical activation on the mica quality parameters
EP  - 8903
IS  - 7
SP  - 8894
VL  - 41
DO  - 10.1016/j.ceramint.2015.03.147
ER  - 
@article{
author = "Terzić, Anja and Pezo, Lato and Andrić, Ljubiša",
year = "2015",
abstract = "The differences in the set of the process parameters measured before and after mica mechanical activation and their influence on the grain size distribution related characteristics have been studied. The modification of the behavior for activated samples has been correlated to the particle size distribution effect produced by activation via an ultra centrifugal mill. The mechanical treatments are energetically and economically unsustainable procedures, therefore the mica activation was optimized on basis of assessment of the process variables effect on the final quality of product parameters. Response surface method, standard score analysis and principal component analysis were used as means of the optimization. Developed models showed r(2) values in the range of 0.816-0.988 and they were able to accurately, predict quality parameters in a wide range of processing parameters. Standard score analysis highlighted that the optimal sample was obtained using sieve mesh of 80 mu m set of processing parameters (SS=0.81). Multiple comparison tests revealed that the optimal variation in the processing parameters could reduce the negative effect of mica samples inherent properties on the final score and improve activation procedure energetic and economic sustainability.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Chemometric analysis of the influence of mechanical activation on the mica quality parameters",
pages = "8903-8894",
number = "7",
volume = "41",
doi = "10.1016/j.ceramint.2015.03.147"
}
Terzić, A., Pezo, L.,& Andrić, L.. (2015). Chemometric analysis of the influence of mechanical activation on the mica quality parameters. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(7), 8894-8903.
https://doi.org/10.1016/j.ceramint.2015.03.147
Terzić A, Pezo L, Andrić L. Chemometric analysis of the influence of mechanical activation on the mica quality parameters. in Ceramics International. 2015;41(7):8894-8903.
doi:10.1016/j.ceramint.2015.03.147 .
Terzić, Anja, Pezo, Lato, Andrić, Ljubiša, "Chemometric analysis of the influence of mechanical activation on the mica quality parameters" in Ceramics International, 41, no. 7 (2015):8894-8903,
https://doi.org/10.1016/j.ceramint.2015.03.147 . .
12
9
12

Analytical modeling of activation procedure applied in alpha-alumina thermo-mechanical synthesis

Terzić, Anja; Pezo, Lato; Andrić, Ljubiša; Mitić, Vojislav

(Elsevier Sci Ltd, Oxford, 2015)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Andrić, Ljubiša
AU  - Mitić, Vojislav
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/271
AB  - The impact of the mechanical processing parameters on the alumina grain-size distribution affiliated characteristics and on the gamma to alpha phase transformation rate was investigated. The moderation in the alumina samples behavior has been correlated to the granulometric and mineralogical changes induced by activation via an ultra-centrifugal mill. The assessment of the activation process variables influence on the final quality of the product parameters was conveyed in order to optimize the mechanical treatment of the alumina, which otherwise could be regarded as either energetically or economically unsustainable procedure. The Response Surface Method, Standard Score Analysis and Principal Component Analysis were applied as means of the mechanical activation optimization. The r(2) values obtained by developed models were in range from 0.816 to 0.988. The established mathematical models were able to precisely predict the quality parameters in a broad range of processing parameters. The Standard Score Analysis emphasized that the optimal output sample was obtained using a sieve mesh of 120 mu m set of processing parameters (SS=0.96). Diverse comparison analyses disclosed that the optimal set of activation process parameters could reduce the negative effect of gamma-alumina samples immanent properties on the final score, and furthermore to enhance the rate of gamma to alpha transition which would improve energetic and economic sustainability of the alumina phase transformation procedure.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Analytical modeling of activation procedure applied in alpha-alumina thermo-mechanical synthesis
EP  - 11917
IS  - 9
SP  - 11908
VL  - 41
DO  - 10.1016/j.ceramint.2015.05.158
ER  - 
@article{
author = "Terzić, Anja and Pezo, Lato and Andrić, Ljubiša and Mitić, Vojislav",
year = "2015",
abstract = "The impact of the mechanical processing parameters on the alumina grain-size distribution affiliated characteristics and on the gamma to alpha phase transformation rate was investigated. The moderation in the alumina samples behavior has been correlated to the granulometric and mineralogical changes induced by activation via an ultra-centrifugal mill. The assessment of the activation process variables influence on the final quality of the product parameters was conveyed in order to optimize the mechanical treatment of the alumina, which otherwise could be regarded as either energetically or economically unsustainable procedure. The Response Surface Method, Standard Score Analysis and Principal Component Analysis were applied as means of the mechanical activation optimization. The r(2) values obtained by developed models were in range from 0.816 to 0.988. The established mathematical models were able to precisely predict the quality parameters in a broad range of processing parameters. The Standard Score Analysis emphasized that the optimal output sample was obtained using a sieve mesh of 120 mu m set of processing parameters (SS=0.96). Diverse comparison analyses disclosed that the optimal set of activation process parameters could reduce the negative effect of gamma-alumina samples immanent properties on the final score, and furthermore to enhance the rate of gamma to alpha transition which would improve energetic and economic sustainability of the alumina phase transformation procedure.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Analytical modeling of activation procedure applied in alpha-alumina thermo-mechanical synthesis",
pages = "11917-11908",
number = "9",
volume = "41",
doi = "10.1016/j.ceramint.2015.05.158"
}
Terzić, A., Pezo, L., Andrić, L.,& Mitić, V.. (2015). Analytical modeling of activation procedure applied in alpha-alumina thermo-mechanical synthesis. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(9), 11908-11917.
https://doi.org/10.1016/j.ceramint.2015.05.158
Terzić A, Pezo L, Andrić L, Mitić V. Analytical modeling of activation procedure applied in alpha-alumina thermo-mechanical synthesis. in Ceramics International. 2015;41(9):11908-11917.
doi:10.1016/j.ceramint.2015.05.158 .
Terzić, Anja, Pezo, Lato, Andrić, Ljubiša, Mitić, Vojislav, "Analytical modeling of activation procedure applied in alpha-alumina thermo-mechanical synthesis" in Ceramics International, 41, no. 9 (2015):11908-11917,
https://doi.org/10.1016/j.ceramint.2015.05.158 . .
10
7
10

Energy conversion in phosphate ore grain mixture activated via ultra-centrifugal mill

Andrić, Ljubiša; Terzić, Anja; Petrov, Milan; Stojanović, Jovica; Kostović, Milena

(Elsevier, Amsterdam, 2015)

TY  - JOUR
AU  - Andrić, Ljubiša
AU  - Terzić, Anja
AU  - Petrov, Milan
AU  - Stojanović, Jovica
AU  - Kostović, Milena
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/272
AB  - The aim of this investigation was to establish the optimal processing parameters of the comminuted phosphate grain mixture mechanical treatment by monitoring and evaluating the activated product characteristics. An ultra-centrifugal mill with a peripheral comminuting path was used as activator in the experiment. A mathematical model based on the theoretical principles of the grain mixture mechanical processing was applied in order to characterize the phosphate activation procedure. As the energy conversion that takes place by the interaction mill-material during activation is recorded on the processed phosphate grains, the increase in potential energy of the activated grains was measured by means of an automatic grain counter. Following the operating hypothesis of the automatic grain counter, the energy conversion and the properties of phosphate grains induced by mechanical force were monitored and expressed in the form of the grain inertia change. The phosphate ore grain mixture used in the experiment was thoroughly analyzed, particularly in its activated state. Analytically obtained results were supported by X-ray diffraction analysis for identification of crystalline phases and change in crystallinity, and SEM microphotography of initial and activated phosphate grains. Diverse comparison analyses disclosed that the optimal set of activation process parameters could reduce the negative effect of phosphate sample immanent properties on the final score and furthermore enhance the material reactivity.
PB  - Elsevier, Amsterdam
T2  - International Journal of Mineral Processing
T1  - Energy conversion in phosphate ore grain mixture activated via ultra-centrifugal mill
EP  - 11
SP  - 1
VL  - 143
DO  - 10.1016/j.minpro.2015.08.005
ER  - 
@article{
author = "Andrić, Ljubiša and Terzić, Anja and Petrov, Milan and Stojanović, Jovica and Kostović, Milena",
year = "2015",
abstract = "The aim of this investigation was to establish the optimal processing parameters of the comminuted phosphate grain mixture mechanical treatment by monitoring and evaluating the activated product characteristics. An ultra-centrifugal mill with a peripheral comminuting path was used as activator in the experiment. A mathematical model based on the theoretical principles of the grain mixture mechanical processing was applied in order to characterize the phosphate activation procedure. As the energy conversion that takes place by the interaction mill-material during activation is recorded on the processed phosphate grains, the increase in potential energy of the activated grains was measured by means of an automatic grain counter. Following the operating hypothesis of the automatic grain counter, the energy conversion and the properties of phosphate grains induced by mechanical force were monitored and expressed in the form of the grain inertia change. The phosphate ore grain mixture used in the experiment was thoroughly analyzed, particularly in its activated state. Analytically obtained results were supported by X-ray diffraction analysis for identification of crystalline phases and change in crystallinity, and SEM microphotography of initial and activated phosphate grains. Diverse comparison analyses disclosed that the optimal set of activation process parameters could reduce the negative effect of phosphate sample immanent properties on the final score and furthermore enhance the material reactivity.",
publisher = "Elsevier, Amsterdam",
journal = "International Journal of Mineral Processing",
title = "Energy conversion in phosphate ore grain mixture activated via ultra-centrifugal mill",
pages = "11-1",
volume = "143",
doi = "10.1016/j.minpro.2015.08.005"
}
Andrić, L., Terzić, A., Petrov, M., Stojanović, J.,& Kostović, M.. (2015). Energy conversion in phosphate ore grain mixture activated via ultra-centrifugal mill. in International Journal of Mineral Processing
Elsevier, Amsterdam., 143, 1-11.
https://doi.org/10.1016/j.minpro.2015.08.005
Andrić L, Terzić A, Petrov M, Stojanović J, Kostović M. Energy conversion in phosphate ore grain mixture activated via ultra-centrifugal mill. in International Journal of Mineral Processing. 2015;143:1-11.
doi:10.1016/j.minpro.2015.08.005 .
Andrić, Ljubiša, Terzić, Anja, Petrov, Milan, Stojanović, Jovica, Kostović, Milena, "Energy conversion in phosphate ore grain mixture activated via ultra-centrifugal mill" in International Journal of Mineral Processing, 143 (2015):1-11,
https://doi.org/10.1016/j.minpro.2015.08.005 . .
7
5
6

Towards sustainable solutions for fly ash reapplication through mechanical activation

Terzić, Anja; Andrić, Ljubiša; Petrov, Milan; Miličić, Ljiljana; Radojević, Zagorka; Pavlović, Ljubica

(2014)

TY  - CONF
AU  - Terzić, Anja
AU  - Andrić, Ljubiša
AU  - Petrov, Milan
AU  - Miličić, Ljiljana
AU  - Radojević, Zagorka
AU  - Pavlović, Ljubica
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/689
AB  - The aim of investigation was to find sustainable solution for coal fly ash reapplication by increasing its reactivity through mechano-activation. For obtaining complete insight into activation process an understanding of theoretical principles of activator operation is necessary. The vibratory mill was used in experiments. The characteristics of activated ash and possibility of grain inertia measurement by automatic grain counter were analyzed. Following proposed AGC operating hypothesis, energy and properties of ash grains induced by mechanical force were expressed as grain inertia change. The ash used in experiment was thoroughly analyzed by XRD and SEM methods. The final result was establishing of the upper limit of activation period.
C3  - 9th Symposium “Recycling Technologies and Sustainable Development” with international participation, Proceedings
T1  - Towards sustainable solutions for fly ash reapplication through mechanical activation
EP  - 173
SP  - 167
UR  - https://hdl.handle.net/21.15107/rcub_rims_689
ER  - 
@conference{
author = "Terzić, Anja and Andrić, Ljubiša and Petrov, Milan and Miličić, Ljiljana and Radojević, Zagorka and Pavlović, Ljubica",
year = "2014",
abstract = "The aim of investigation was to find sustainable solution for coal fly ash reapplication by increasing its reactivity through mechano-activation. For obtaining complete insight into activation process an understanding of theoretical principles of activator operation is necessary. The vibratory mill was used in experiments. The characteristics of activated ash and possibility of grain inertia measurement by automatic grain counter were analyzed. Following proposed AGC operating hypothesis, energy and properties of ash grains induced by mechanical force were expressed as grain inertia change. The ash used in experiment was thoroughly analyzed by XRD and SEM methods. The final result was establishing of the upper limit of activation period.",
journal = "9th Symposium “Recycling Technologies and Sustainable Development” with international participation, Proceedings",
title = "Towards sustainable solutions for fly ash reapplication through mechanical activation",
pages = "173-167",
url = "https://hdl.handle.net/21.15107/rcub_rims_689"
}
Terzić, A., Andrić, L., Petrov, M., Miličić, L., Radojević, Z.,& Pavlović, L.. (2014). Towards sustainable solutions for fly ash reapplication through mechanical activation. in 9th Symposium “Recycling Technologies and Sustainable Development” with international participation, Proceedings, 167-173.
https://hdl.handle.net/21.15107/rcub_rims_689
Terzić A, Andrić L, Petrov M, Miličić L, Radojević Z, Pavlović L. Towards sustainable solutions for fly ash reapplication through mechanical activation. in 9th Symposium “Recycling Technologies and Sustainable Development” with international participation, Proceedings. 2014;:167-173.
https://hdl.handle.net/21.15107/rcub_rims_689 .
Terzić, Anja, Andrić, Ljubiša, Petrov, Milan, Miličić, Ljiljana, Radojević, Zagorka, Pavlović, Ljubica, "Towards sustainable solutions for fly ash reapplication through mechanical activation" in 9th Symposium “Recycling Technologies and Sustainable Development” with international participation, Proceedings (2014):167-173,
https://hdl.handle.net/21.15107/rcub_rims_689 .

Investigation of high temperature behavior and sintering mechanism of fly ash based concretes

Terzić, Anja; Andrić, Ljubiša; Petrov, Milan; Radojević, Zagorka; Miličić, Ljiljana

(Procema SA, 2014)

TY  - JOUR
AU  - Terzić, Anja
AU  - Andrić, Ljubiša
AU  - Petrov, Milan
AU  - Radojević, Zagorka
AU  - Miličić, Ljiljana
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/259
AB  - Four types of refractory concretes were studied at various temperatures ranging from ambient to adopted maximal 1400 degrees C. The concretes had same matrix composition: K concretes were based on corundum aggregate; B concretes were based on bauxite aggregate and chamotte filler; while K2 and B2 concretes had 30 % of fly ash replacement in bonding agent. Fly ash was mechanically activated by means of planetary ball mill. Samples were dried at 110 degrees C during 24 hours to create standard specimens. Afterwards, the samples were preburned at 1100 degrees C and subsequently subjected to compressive uniaxial creep test conducted at various temperatures (1200, 1300 and 1400 degrees C). Thermal behavior was also investigated by dilatometry analysis starting from room temperature up to 1400 degrees C. The evolution of the refractory concretes behavior from quasi-brittle to viscoplastic was investigated and correlated to their microstructure evolution induced by sintering process. The influence of the burning temperature and procedure duration on the concretes behavior is also discussed. Creep test and dilatometry analysis helped in defining of the sintering mechanism and its parameters, and additionally explained deformation nature of the refractory concretes.
PB  - Procema SA
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Investigation of high temperature behavior and sintering mechanism of fly ash based concretes
EP  - 224
IS  - 3
SP  - 213
VL  - 44
UR  - https://hdl.handle.net/21.15107/rcub_rims_259
ER  - 
@article{
author = "Terzić, Anja and Andrić, Ljubiša and Petrov, Milan and Radojević, Zagorka and Miličić, Ljiljana",
year = "2014",
abstract = "Four types of refractory concretes were studied at various temperatures ranging from ambient to adopted maximal 1400 degrees C. The concretes had same matrix composition: K concretes were based on corundum aggregate; B concretes were based on bauxite aggregate and chamotte filler; while K2 and B2 concretes had 30 % of fly ash replacement in bonding agent. Fly ash was mechanically activated by means of planetary ball mill. Samples were dried at 110 degrees C during 24 hours to create standard specimens. Afterwards, the samples were preburned at 1100 degrees C and subsequently subjected to compressive uniaxial creep test conducted at various temperatures (1200, 1300 and 1400 degrees C). Thermal behavior was also investigated by dilatometry analysis starting from room temperature up to 1400 degrees C. The evolution of the refractory concretes behavior from quasi-brittle to viscoplastic was investigated and correlated to their microstructure evolution induced by sintering process. The influence of the burning temperature and procedure duration on the concretes behavior is also discussed. Creep test and dilatometry analysis helped in defining of the sintering mechanism and its parameters, and additionally explained deformation nature of the refractory concretes.",
publisher = "Procema SA",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Investigation of high temperature behavior and sintering mechanism of fly ash based concretes",
pages = "224-213",
number = "3",
volume = "44",
url = "https://hdl.handle.net/21.15107/rcub_rims_259"
}
Terzić, A., Andrić, L., Petrov, M., Radojević, Z.,& Miličić, L.. (2014). Investigation of high temperature behavior and sintering mechanism of fly ash based concretes. in Revista Romana de Materiale/ Romanian Journal of Materials
Procema SA., 44(3), 213-224.
https://hdl.handle.net/21.15107/rcub_rims_259
Terzić A, Andrić L, Petrov M, Radojević Z, Miličić L. Investigation of high temperature behavior and sintering mechanism of fly ash based concretes. in Revista Romana de Materiale/ Romanian Journal of Materials. 2014;44(3):213-224.
https://hdl.handle.net/21.15107/rcub_rims_259 .
Terzić, Anja, Andrić, Ljubiša, Petrov, Milan, Radojević, Zagorka, Miličić, Ljiljana, "Investigation of high temperature behavior and sintering mechanism of fly ash based concretes" in Revista Romana de Materiale/ Romanian Journal of Materials, 44, no. 3 (2014):213-224,
https://hdl.handle.net/21.15107/rcub_rims_259 .
2
3

Mechanical Activation as Sintering Pre-treatment of Talc for Steatite Ceramics

Terzić, Anja; Andrić, Ljubiša; Stojanović, Jovica; Obradović, Nina; Kostović, Milena

(Međunarodni Institut za nauku o sinterovanju, Beograd, 2014)

TY  - JOUR
AU  - Terzić, Anja
AU  - Andrić, Ljubiša
AU  - Stojanović, Jovica
AU  - Obradović, Nina
AU  - Kostović, Milena
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/236
AB  - The effect of vibratory mill induced mechanical activation on the change of the particle size, crystallinity and the phase transformations of the minerals present in the activated material, was studied with the purpose of decreasing of the sintering temperature of talc (Mg3Si4O10(OH)(2)) as raw material which is the basic component of the steatite ceramics. The aims of the conducted investigation were, also, increasing of the reactivity of the comminuted raw material and establishing of the optimal activation period. The properties of the activated talc induced by mechanical force were expressed in form of the grain inertia change which was measured by means of automatic grain counter. Mechanically activated grains are the most convenient mineral form for physical concentration since the energy change of the mill-material system is recorded on them. The effect of dry grinding on the structure, particle size and shape of talc was studied by means of XRD, DTA and SEM/EDS methods. Activation of talc produced an increase of the starting surface area value progressively from 4.5 m(2)/g up to a maximum of 108.5 m(2)/g achieved at 30 min. A subsequent decrease of rate of surface area change and the rate of size reduction were observed following the prolonged grinding. Talc activated in vibratory mill for optimal 30 min showed properties which positively influence the decrease of sintering temperature and the increase of the sintering rate of steatite ceramics.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Mechanical Activation as Sintering Pre-treatment of Talc for Steatite Ceramics
EP  - 258
IS  - 2
SP  - 247
VL  - 46
DO  - 10.2298/SOS1402247T
ER  - 
@article{
author = "Terzić, Anja and Andrić, Ljubiša and Stojanović, Jovica and Obradović, Nina and Kostović, Milena",
year = "2014",
abstract = "The effect of vibratory mill induced mechanical activation on the change of the particle size, crystallinity and the phase transformations of the minerals present in the activated material, was studied with the purpose of decreasing of the sintering temperature of talc (Mg3Si4O10(OH)(2)) as raw material which is the basic component of the steatite ceramics. The aims of the conducted investigation were, also, increasing of the reactivity of the comminuted raw material and establishing of the optimal activation period. The properties of the activated talc induced by mechanical force were expressed in form of the grain inertia change which was measured by means of automatic grain counter. Mechanically activated grains are the most convenient mineral form for physical concentration since the energy change of the mill-material system is recorded on them. The effect of dry grinding on the structure, particle size and shape of talc was studied by means of XRD, DTA and SEM/EDS methods. Activation of talc produced an increase of the starting surface area value progressively from 4.5 m(2)/g up to a maximum of 108.5 m(2)/g achieved at 30 min. A subsequent decrease of rate of surface area change and the rate of size reduction were observed following the prolonged grinding. Talc activated in vibratory mill for optimal 30 min showed properties which positively influence the decrease of sintering temperature and the increase of the sintering rate of steatite ceramics.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Mechanical Activation as Sintering Pre-treatment of Talc for Steatite Ceramics",
pages = "258-247",
number = "2",
volume = "46",
doi = "10.2298/SOS1402247T"
}
Terzić, A., Andrić, L., Stojanović, J., Obradović, N.,& Kostović, M.. (2014). Mechanical Activation as Sintering Pre-treatment of Talc for Steatite Ceramics. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 46(2), 247-258.
https://doi.org/10.2298/SOS1402247T
Terzić A, Andrić L, Stojanović J, Obradović N, Kostović M. Mechanical Activation as Sintering Pre-treatment of Talc for Steatite Ceramics. in Science of Sintering. 2014;46(2):247-258.
doi:10.2298/SOS1402247T .
Terzić, Anja, Andrić, Ljubiša, Stojanović, Jovica, Obradović, Nina, Kostović, Milena, "Mechanical Activation as Sintering Pre-treatment of Talc for Steatite Ceramics" in Science of Sintering, 46, no. 2 (2014):247-258,
https://doi.org/10.2298/SOS1402247T . .
8
6
11

Comparative analysis of process parameters of talc mechanical activation in centrifugal and attrition mill

Andrić, Ljubiša; Terzić, Anja; Aćimović-Pavlović, Zagorka; Pavlović, Ljubica; Petrov, Milan

(Oficyna Wydawnicza Politechniki Wroclawskiej, Wroclaw, 2014)

TY  - JOUR
AU  - Andrić, Ljubiša
AU  - Terzić, Anja
AU  - Aćimović-Pavlović, Zagorka
AU  - Pavlović, Ljubica
AU  - Petrov, Milan
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/257
AB  - The efficiency of talc mechanical activation by means of two different mechano-activators centrifugal and attrition mill is investigated in this study and the comparative analysis of the characteristics of obtained talc powders is presented. A new approach for obtaining high-grade talc concentrate with low Fe2O3 content is achieved through effect of mechanical activation of talc accompanied by hydrometallurgical process. The applied mechanical activation process conditions of ultra-centrifugal mill were defined by number of rotor revolutions, sieve mesh size, and current intensity. These operating parameters of the ultra-centrifugal mill were variable. Ultra fine grinding of talc in attrition mill (attritor) was carried out in various time intervals - from 5 to 15 min. The following technological parameters of the mechanical activation were monitored: time of mechanical activation, circumferential rotor speed, capacity of ultra-centrifugal mill, and specific energy consumption. The investigation was based on a kinetic model. The structure and behavior of activated samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, and differential thermal analysis (DTA).
PB  - Oficyna Wydawnicza Politechniki Wroclawskiej, Wroclaw
T2  - Physicochemical Problems of Mineral Processing
T1  - Comparative analysis of process parameters of talc mechanical activation in centrifugal and attrition mill
EP  - 452
IS  - 2
SP  - 433
VL  - 50
DO  - 10.5277/ppmp140202
ER  - 
@article{
author = "Andrić, Ljubiša and Terzić, Anja and Aćimović-Pavlović, Zagorka and Pavlović, Ljubica and Petrov, Milan",
year = "2014",
abstract = "The efficiency of talc mechanical activation by means of two different mechano-activators centrifugal and attrition mill is investigated in this study and the comparative analysis of the characteristics of obtained talc powders is presented. A new approach for obtaining high-grade talc concentrate with low Fe2O3 content is achieved through effect of mechanical activation of talc accompanied by hydrometallurgical process. The applied mechanical activation process conditions of ultra-centrifugal mill were defined by number of rotor revolutions, sieve mesh size, and current intensity. These operating parameters of the ultra-centrifugal mill were variable. Ultra fine grinding of talc in attrition mill (attritor) was carried out in various time intervals - from 5 to 15 min. The following technological parameters of the mechanical activation were monitored: time of mechanical activation, circumferential rotor speed, capacity of ultra-centrifugal mill, and specific energy consumption. The investigation was based on a kinetic model. The structure and behavior of activated samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, and differential thermal analysis (DTA).",
publisher = "Oficyna Wydawnicza Politechniki Wroclawskiej, Wroclaw",
journal = "Physicochemical Problems of Mineral Processing",
title = "Comparative analysis of process parameters of talc mechanical activation in centrifugal and attrition mill",
pages = "452-433",
number = "2",
volume = "50",
doi = "10.5277/ppmp140202"
}
Andrić, L., Terzić, A., Aćimović-Pavlović, Z., Pavlović, L.,& Petrov, M.. (2014). Comparative analysis of process parameters of talc mechanical activation in centrifugal and attrition mill. in Physicochemical Problems of Mineral Processing
Oficyna Wydawnicza Politechniki Wroclawskiej, Wroclaw., 50(2), 433-452.
https://doi.org/10.5277/ppmp140202
Andrić L, Terzić A, Aćimović-Pavlović Z, Pavlović L, Petrov M. Comparative analysis of process parameters of talc mechanical activation in centrifugal and attrition mill. in Physicochemical Problems of Mineral Processing. 2014;50(2):433-452.
doi:10.5277/ppmp140202 .
Andrić, Ljubiša, Terzić, Anja, Aćimović-Pavlović, Zagorka, Pavlović, Ljubica, Petrov, Milan, "Comparative analysis of process parameters of talc mechanical activation in centrifugal and attrition mill" in Physicochemical Problems of Mineral Processing, 50, no. 2 (2014):433-452,
https://doi.org/10.5277/ppmp140202 . .
9
12

Comparative kinetic study of mechanical activation process of mica and talc for industrial application

Andrić, Ljubiša; Terzić, Anja; Aćimović-Pavlović, Zagorka; Pavlović, Ljubica; Petrov, Milan

(Elsevier Sci Ltd, Oxford, 2014)

TY  - JOUR
AU  - Andrić, Ljubiša
AU  - Terzić, Anja
AU  - Aćimović-Pavlović, Zagorka
AU  - Pavlović, Ljubica
AU  - Petrov, Milan
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/255
AB  - Mica and talc have wide areas of application as a raw material in a number of industrial branches. Mechanically activated mica has specific applications such as: capacitors, insulators, and pearlescent pigments. Talc is widely used as either a basic raw material or as filler. This paper presents a comparative analysis of mechanically activated samples of mica and talc in ultra-centrifugal mechano-activator "Retsch ZM-1". The following mechano-activator parameters were variable: number of rotor revolutions (rpm); sieve mesh size (mu m); current intensity (A). In addition, the following parameters were monitored: duration of mechanical activation, t (min); circumferential rotor speed, v (m/s); capacity of mechano-activator, Q (kg/h); and specific energy consumption, W-e (kW h/t). It was observed that effect of mechanical activation of mica and talc increased with an increase of the load and rotor revolution of ultra-centrifugal mechano-activator. Both mica and talc were successfully treated by mechanical activation procedure. In the processing of mica, mechanical activation is suggested to be applied as a post-treatment, and in the talc processing as a pre-treatment, as the high quality talc is obtained by means of hydrometallurgical concentration method.
PB  - Elsevier Sci Ltd, Oxford
T2  - Composites Part B-Engineering
T1  - Comparative kinetic study of mechanical activation process of mica and talc for industrial application
EP  - 190
SP  - 181
VL  - 59
DO  - 10.1016/j.compositesb.2013.12.003
ER  - 
@article{
author = "Andrić, Ljubiša and Terzić, Anja and Aćimović-Pavlović, Zagorka and Pavlović, Ljubica and Petrov, Milan",
year = "2014",
abstract = "Mica and talc have wide areas of application as a raw material in a number of industrial branches. Mechanically activated mica has specific applications such as: capacitors, insulators, and pearlescent pigments. Talc is widely used as either a basic raw material or as filler. This paper presents a comparative analysis of mechanically activated samples of mica and talc in ultra-centrifugal mechano-activator "Retsch ZM-1". The following mechano-activator parameters were variable: number of rotor revolutions (rpm); sieve mesh size (mu m); current intensity (A). In addition, the following parameters were monitored: duration of mechanical activation, t (min); circumferential rotor speed, v (m/s); capacity of mechano-activator, Q (kg/h); and specific energy consumption, W-e (kW h/t). It was observed that effect of mechanical activation of mica and talc increased with an increase of the load and rotor revolution of ultra-centrifugal mechano-activator. Both mica and talc were successfully treated by mechanical activation procedure. In the processing of mica, mechanical activation is suggested to be applied as a post-treatment, and in the talc processing as a pre-treatment, as the high quality talc is obtained by means of hydrometallurgical concentration method.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Composites Part B-Engineering",
title = "Comparative kinetic study of mechanical activation process of mica and talc for industrial application",
pages = "190-181",
volume = "59",
doi = "10.1016/j.compositesb.2013.12.003"
}
Andrić, L., Terzić, A., Aćimović-Pavlović, Z., Pavlović, L.,& Petrov, M.. (2014). Comparative kinetic study of mechanical activation process of mica and talc for industrial application. in Composites Part B-Engineering
Elsevier Sci Ltd, Oxford., 59, 181-190.
https://doi.org/10.1016/j.compositesb.2013.12.003
Andrić L, Terzić A, Aćimović-Pavlović Z, Pavlović L, Petrov M. Comparative kinetic study of mechanical activation process of mica and talc for industrial application. in Composites Part B-Engineering. 2014;59:181-190.
doi:10.1016/j.compositesb.2013.12.003 .
Andrić, Ljubiša, Terzić, Anja, Aćimović-Pavlović, Zagorka, Pavlović, Ljubica, Petrov, Milan, "Comparative kinetic study of mechanical activation process of mica and talc for industrial application" in Composites Part B-Engineering, 59 (2014):181-190,
https://doi.org/10.1016/j.compositesb.2013.12.003 . .
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