Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications

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Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications (en)
Истраживање могућности примене отпадних и рециклираних материјала у бетонским композитима, са оценом утицаја на животну средину, у циљу промоције одрживог грађевинарства у србији (sr)
Istraživanje mogućnosti primene otpadnih i recikliranih materijala u betonskim kompozitima, sa ocenom uticaja na životnu sredinu, u cilju promocije održivog građevinarstva u srbiji (sr_RS)
Authors

Publications

Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins

Ilić, Biljana; Mitrović, Aleksandra; Miličić, Ljiljana; Zdujić, Miodrag

(Elsevier Sci Ltd, Oxford, 2018)

TY  - JOUR
AU  - Ilić, Biljana
AU  - Mitrović, Aleksandra
AU  - Miličić, Ljiljana
AU  - Zdujić, Miodrag
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/347
AB  - The effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses. Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30-50%), especially when autoclaving curing conditions were applied.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins
EP  - 101
SP  - 92
VL  - 178
DO  - 10.1016/j.conbuildmat.2018.05.144
ER  - 
@article{
author = "Ilić, Biljana and Mitrović, Aleksandra and Miličić, Ljiljana and Zdujić, Miodrag",
year = "2018",
abstract = "The effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses. Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30-50%), especially when autoclaving curing conditions were applied.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins",
pages = "101-92",
volume = "178",
doi = "10.1016/j.conbuildmat.2018.05.144"
}
Ilić, B., Mitrović, A., Miličić, L.,& Zdujić, M.. (2018). Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 178, 92-101.
https://doi.org/10.1016/j.conbuildmat.2018.05.144
Ilić B, Mitrović A, Miličić L, Zdujić M. Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins. in Construction and Building Materials. 2018;178:92-101.
doi:10.1016/j.conbuildmat.2018.05.144 .
Ilić, Biljana, Mitrović, Aleksandra, Miličić, Ljiljana, Zdujić, Miodrag, "Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins" in Construction and Building Materials, 178 (2018):92-101,
https://doi.org/10.1016/j.conbuildmat.2018.05.144 . .
18
6
20

Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin

Ilić, Biljana; Mitrović, Aleksandra; Radonjanin, Vlastimir; Malešev, Mirjana; Zdujić, Miodrag

(Springer, Dordrecht, 2018)

TY  - CONF
AU  - Ilić, Biljana
AU  - Mitrović, Aleksandra
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/350
AB  - Kaolin from a Serbian deposit, having a high content of mica and quartz, disordered kaolinite and a high specific surface area, was used to prepare metakaolin (MK). The calcination at temperatures of 700 degrees C or 750 degrees C for 30 to 180 min resulted in MK having high pozzolanic activity, but also significant aglomeration of particles. In order to disperse aglomerates, MK was milled, which resulted in increased pozzolanic activity and reduced particle size. The effects of MK and additionally milled metakaolin (MKmill) on the composite strengths and microstructure of the pastes were compared. We prepared and investigated composites in which ordinary Portland cement (OPC) was replaced with 10% to 50% of MK or MKmill, as well as the representative samples of paste for determination of microstructure. Compressive strengths higher than the control were obtained for composites having up to 30% of MK and up to 40% of MKmill, respectively. Increase of composite strengths with MKmill was more pronounced at lower cement replacement levels (10% and 20%). Compressive strength of composites containing agglomerated MK were satisfactory, which suggests that milling of MK, as well as purification of kaolin, may not be necessary.
PB  - Springer, Dordrecht
C3  - Calcined Clays for Sustainable Concrete
T1  - Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin
EP  - 218
SP  - 212
VL  - 16
DO  - 10.1007/978-94-024-1207-9_34
ER  - 
@conference{
author = "Ilić, Biljana and Mitrović, Aleksandra and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag",
year = "2018",
abstract = "Kaolin from a Serbian deposit, having a high content of mica and quartz, disordered kaolinite and a high specific surface area, was used to prepare metakaolin (MK). The calcination at temperatures of 700 degrees C or 750 degrees C for 30 to 180 min resulted in MK having high pozzolanic activity, but also significant aglomeration of particles. In order to disperse aglomerates, MK was milled, which resulted in increased pozzolanic activity and reduced particle size. The effects of MK and additionally milled metakaolin (MKmill) on the composite strengths and microstructure of the pastes were compared. We prepared and investigated composites in which ordinary Portland cement (OPC) was replaced with 10% to 50% of MK or MKmill, as well as the representative samples of paste for determination of microstructure. Compressive strengths higher than the control were obtained for composites having up to 30% of MK and up to 40% of MKmill, respectively. Increase of composite strengths with MKmill was more pronounced at lower cement replacement levels (10% and 20%). Compressive strength of composites containing agglomerated MK were satisfactory, which suggests that milling of MK, as well as purification of kaolin, may not be necessary.",
publisher = "Springer, Dordrecht",
journal = "Calcined Clays for Sustainable Concrete",
title = "Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin",
pages = "218-212",
volume = "16",
doi = "10.1007/978-94-024-1207-9_34"
}
Ilić, B., Mitrović, A., Radonjanin, V., Malešev, M.,& Zdujić, M.. (2018). Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin. in Calcined Clays for Sustainable Concrete
Springer, Dordrecht., 16, 212-218.
https://doi.org/10.1007/978-94-024-1207-9_34
Ilić B, Mitrović A, Radonjanin V, Malešev M, Zdujić M. Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin. in Calcined Clays for Sustainable Concrete. 2018;16:212-218.
doi:10.1007/978-94-024-1207-9_34 .
Ilić, Biljana, Mitrović, Aleksandra, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, "Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin" in Calcined Clays for Sustainable Concrete, 16 (2018):212-218,
https://doi.org/10.1007/978-94-024-1207-9_34 . .
4
1
4

Properties of the Cement-Based Composites with High Content of Metakaolin

Ilić, Biljana; Radonjanin, Vlastimir; Malešev, Mirjana; Zdujić, Miodrag; Mitrović, Aleksandra

(Springer, Dordrecht, 2018)

TY  - CONF
AU  - Ilić, Biljana
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
AU  - Mitrović, Aleksandra
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/332
AB  - Environmental concerns and sustainable development require increased replacement of cement. Most of previous studies have shown that the compressive strength of cement-based composites is maximized with a 20% content of metakaolin. We investigated composites prepared by replacing ordinary Portland Cement (OPC) with 30 to 50% of metakaolin (MK) and addition of appropriate amount of hydrated lime, which were ordinary cured for 2, 28 or 90 days. Hydration products and microstructure of the pastes were determined by X-ray diffraction (XRD), differential thermal analysis/thermal gravimetry (DTA/TG) and mercury intrusion porosimetry (MIP). MK was produced by calcination of kaolin from a Serbian deposit, which contained a high level of impurities. Replacement of OPC with 30% of MK achieved 28 days compressive strength equivalent to that of the control mix. Higher replacement levels, 40% and 50%, combined with the addition of hydrated lime, achieved satisfactory relative strengths of 94% and 87%, respectively. The positive contribution was particularly pronounced after 90 days for a composite containing 50% of MK. The results clearly showed a possibility of obtaining composites having acceptable compressive strength with reduced cement content in accordance with environmental and sustained development requirements.
PB  - Springer, Dordrecht
C3  - Calcined Clays for Sustainable Concrete
T1  - Properties of the Cement-Based Composites with High Content of Metakaolin
EP  - 225
SP  - 219
VL  - 16
DO  - 10.1007/978-94-024-1207-9_35
ER  - 
@conference{
author = "Ilić, Biljana and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag and Mitrović, Aleksandra",
year = "2018",
abstract = "Environmental concerns and sustainable development require increased replacement of cement. Most of previous studies have shown that the compressive strength of cement-based composites is maximized with a 20% content of metakaolin. We investigated composites prepared by replacing ordinary Portland Cement (OPC) with 30 to 50% of metakaolin (MK) and addition of appropriate amount of hydrated lime, which were ordinary cured for 2, 28 or 90 days. Hydration products and microstructure of the pastes were determined by X-ray diffraction (XRD), differential thermal analysis/thermal gravimetry (DTA/TG) and mercury intrusion porosimetry (MIP). MK was produced by calcination of kaolin from a Serbian deposit, which contained a high level of impurities. Replacement of OPC with 30% of MK achieved 28 days compressive strength equivalent to that of the control mix. Higher replacement levels, 40% and 50%, combined with the addition of hydrated lime, achieved satisfactory relative strengths of 94% and 87%, respectively. The positive contribution was particularly pronounced after 90 days for a composite containing 50% of MK. The results clearly showed a possibility of obtaining composites having acceptable compressive strength with reduced cement content in accordance with environmental and sustained development requirements.",
publisher = "Springer, Dordrecht",
journal = "Calcined Clays for Sustainable Concrete",
title = "Properties of the Cement-Based Composites with High Content of Metakaolin",
pages = "225-219",
volume = "16",
doi = "10.1007/978-94-024-1207-9_35"
}
Ilić, B., Radonjanin, V., Malešev, M., Zdujić, M.,& Mitrović, A.. (2018). Properties of the Cement-Based Composites with High Content of Metakaolin. in Calcined Clays for Sustainable Concrete
Springer, Dordrecht., 16, 219-225.
https://doi.org/10.1007/978-94-024-1207-9_35
Ilić B, Radonjanin V, Malešev M, Zdujić M, Mitrović A. Properties of the Cement-Based Composites with High Content of Metakaolin. in Calcined Clays for Sustainable Concrete. 2018;16:219-225.
doi:10.1007/978-94-024-1207-9_35 .
Ilić, Biljana, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, Mitrović, Aleksandra, "Properties of the Cement-Based Composites with High Content of Metakaolin" in Calcined Clays for Sustainable Concrete, 16 (2018):219-225,
https://doi.org/10.1007/978-94-024-1207-9_35 . .
1
1
1

The influence of tailings and cement type on durability properties of self-compacting concrete

Janković, Ksenija; Šušić, Nenad; Stojanović, Marko; Bojović, Dragan; Lončar, Ljiljana

(Univ Osijek, Tech Fac, Slavonski Brod, 2017)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Šušić, Nenad
AU  - Stojanović, Marko
AU  - Bojović, Dragan
AU  - Lončar, Ljiljana
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/325
AB  - In order to examine the differences in chemical composition and the possibility of using mine tailings in mortar and concrete production, samples were taken from the landfill and directly from the production. Tailings test results showed no pozzolanic activity and that its application in concrete can be only a partial replacement of aggregate. This paper presents the possibility of using tailings in self-compacting concrete made with Portland cement and sulphate resistant cement. Concrete specimens in which the aggregate fraction 0/4 mm was replaced with 10 and 20 % of tailings were examined. The resistance to freezing and thawing with and without de-icing salts is used as an indicator of concrete durability.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnicki Vjesnik-Technical Gazette
T1  - The influence of tailings and cement type on durability properties of self-compacting concrete
EP  - 962
IS  - 3
SP  - 957
VL  - 24
DO  - 10.17559/TV-20160304113800
ER  - 
@article{
author = "Janković, Ksenija and Šušić, Nenad and Stojanović, Marko and Bojović, Dragan and Lončar, Ljiljana",
year = "2017",
abstract = "In order to examine the differences in chemical composition and the possibility of using mine tailings in mortar and concrete production, samples were taken from the landfill and directly from the production. Tailings test results showed no pozzolanic activity and that its application in concrete can be only a partial replacement of aggregate. This paper presents the possibility of using tailings in self-compacting concrete made with Portland cement and sulphate resistant cement. Concrete specimens in which the aggregate fraction 0/4 mm was replaced with 10 and 20 % of tailings were examined. The resistance to freezing and thawing with and without de-icing salts is used as an indicator of concrete durability.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnicki Vjesnik-Technical Gazette",
title = "The influence of tailings and cement type on durability properties of self-compacting concrete",
pages = "962-957",
number = "3",
volume = "24",
doi = "10.17559/TV-20160304113800"
}
Janković, K., Šušić, N., Stojanović, M., Bojović, D.,& Lončar, L.. (2017). The influence of tailings and cement type on durability properties of self-compacting concrete. in Tehnicki Vjesnik-Technical Gazette
Univ Osijek, Tech Fac, Slavonski Brod., 24(3), 957-962.
https://doi.org/10.17559/TV-20160304113800
Janković K, Šušić N, Stojanović M, Bojović D, Lončar L. The influence of tailings and cement type on durability properties of self-compacting concrete. in Tehnicki Vjesnik-Technical Gazette. 2017;24(3):957-962.
doi:10.17559/TV-20160304113800 .
Janković, Ksenija, Šušić, Nenad, Stojanović, Marko, Bojović, Dragan, Lončar, Ljiljana, "The influence of tailings and cement type on durability properties of self-compacting concrete" in Tehnicki Vjesnik-Technical Gazette, 24, no. 3 (2017):957-962,
https://doi.org/10.17559/TV-20160304113800 . .
10
5
11

Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions

Ilić, Biljana; Radonjanin, Vlastimir; Malešev, Mirjana; Zdujić, Miodrag; Mitrović, Aleksandra

(Elsevier Sci Ltd, Oxford, 2017)

TY  - JOUR
AU  - Ilić, Biljana
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
AU  - Mitrović, Aleksandra
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/312
AB  - The effects of thermally (MK) or mechanically activated kaolin (AK) on the compressive strength of mortars and microstructure of pastes were investigated. Mortar mixtures, in which 10%, 20% and 30% of ordinary Portland cement (OPC) was replaced by either MK or AK, were prepared (w/b of 0.5) and ordinary (age 2, 28 or 90 days) and autoclave cured. Hydration products were determined by X-ray diffraction (XRD) and differential thermal analysis/thermal gravimetry (DTA/TG) analysis, while microstructure was investigated by mercury intrusion porosimetry (MIP). MK substitution increases the compressive strength of ordinary-cured mortars, as a result of the higher content of reactive silica that caused more pronounced pozzolanic reaction, as well as by effective refinement of their pore structure. Positive effects on the compressive strength could be achieved up to 30% substitution of OPC by MK The OPC substitution by AK resulted in lower strengths of ordinary-cured mortars, compared to both MK mortars and reference. Higher specific surface area and finer particles of AK were insufficient to compensate, through filler effect, lower pozzolanic reaction and additional negative influence of the kaolinite presence. The highest compressive strength was obtained for mortar with 10% of AK (relative strength of 94%). In comparison to the reference, autoclaved MK and AK mortars, exhibited lower compressive strength, as a consequence of increasing the hydrogarnet formation, instead of tobermorite. The highest strength was achieved for mortar with 10% of AK.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions
EP  - 252
SP  - 243
VL  - 133
DO  - 10.1016/j.conbuildmat.2016.12.068
ER  - 
@article{
author = "Ilić, Biljana and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag and Mitrović, Aleksandra",
year = "2017",
abstract = "The effects of thermally (MK) or mechanically activated kaolin (AK) on the compressive strength of mortars and microstructure of pastes were investigated. Mortar mixtures, in which 10%, 20% and 30% of ordinary Portland cement (OPC) was replaced by either MK or AK, were prepared (w/b of 0.5) and ordinary (age 2, 28 or 90 days) and autoclave cured. Hydration products were determined by X-ray diffraction (XRD) and differential thermal analysis/thermal gravimetry (DTA/TG) analysis, while microstructure was investigated by mercury intrusion porosimetry (MIP). MK substitution increases the compressive strength of ordinary-cured mortars, as a result of the higher content of reactive silica that caused more pronounced pozzolanic reaction, as well as by effective refinement of their pore structure. Positive effects on the compressive strength could be achieved up to 30% substitution of OPC by MK The OPC substitution by AK resulted in lower strengths of ordinary-cured mortars, compared to both MK mortars and reference. Higher specific surface area and finer particles of AK were insufficient to compensate, through filler effect, lower pozzolanic reaction and additional negative influence of the kaolinite presence. The highest compressive strength was obtained for mortar with 10% of AK (relative strength of 94%). In comparison to the reference, autoclaved MK and AK mortars, exhibited lower compressive strength, as a consequence of increasing the hydrogarnet formation, instead of tobermorite. The highest strength was achieved for mortar with 10% of AK.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions",
pages = "252-243",
volume = "133",
doi = "10.1016/j.conbuildmat.2016.12.068"
}
Ilić, B., Radonjanin, V., Malešev, M., Zdujić, M.,& Mitrović, A.. (2017). Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 133, 243-252.
https://doi.org/10.1016/j.conbuildmat.2016.12.068
Ilić B, Radonjanin V, Malešev M, Zdujić M, Mitrović A. Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions. in Construction and Building Materials. 2017;133:243-252.
doi:10.1016/j.conbuildmat.2016.12.068 .
Ilić, Biljana, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, Mitrović, Aleksandra, "Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions" in Construction and Building Materials, 133 (2017):243-252,
https://doi.org/10.1016/j.conbuildmat.2016.12.068 . .
44
22
43

Durability of concrete with different types of cement

Janković, Ksenija; Lončar, Ljiljana; Bojović, Dragan; Stojanović, Marko

(Procema SA, 2016)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Lončar, Ljiljana
AU  - Bojović, Dragan
AU  - Stojanović, Marko
PY  - 2016
UR  - http://rims.institutims.rs/handle/123456789/299
AB  - Adequate measures must be taken during the determination of the concrete composition for ensuring the durability of concrete exposed to an aggressive environment. The influence of the cement type on the freeze/thaw resistance with and without de-icing salt of concrete was tested. Samples were made using five types of cement. All types of concrete made according to the recommendations of the Serbian and European norms had the required frost resistance. Besides the respected recommendations, concrete made using cement with 35% mineral additions of fly ash and lime was not freeze/thaw resistant with de-icing salt. Weathering resistance for paving units is determined according to EN 1338 and EN 1339 for freeze/thaw resistance with de-icing salt or water absorption. Taking into account previous investigations, only samples which were made in accordance with the recommendations of the Serbian Building code requirements for concrete and reinforced concrete - BAB 87 and European norms EN 206-1 were tested. Regarding water absorption, it is expected that in the case of established production all types of concrete would be integrated into class 2 according to EN. Also, for two representative types of concrete with different air content and degree of damage done by destructive test, non-destructive test by device RapidAir 457 was done (specific surface, spacing factor, void frequency and average chord length).
PB  - Procema SA
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Durability of concrete with different types of cement
EP  - 221
IS  - 2
SP  - 215
VL  - 46
UR  - https://hdl.handle.net/21.15107/rcub_rims_299
ER  - 
@article{
author = "Janković, Ksenija and Lončar, Ljiljana and Bojović, Dragan and Stojanović, Marko",
year = "2016",
abstract = "Adequate measures must be taken during the determination of the concrete composition for ensuring the durability of concrete exposed to an aggressive environment. The influence of the cement type on the freeze/thaw resistance with and without de-icing salt of concrete was tested. Samples were made using five types of cement. All types of concrete made according to the recommendations of the Serbian and European norms had the required frost resistance. Besides the respected recommendations, concrete made using cement with 35% mineral additions of fly ash and lime was not freeze/thaw resistant with de-icing salt. Weathering resistance for paving units is determined according to EN 1338 and EN 1339 for freeze/thaw resistance with de-icing salt or water absorption. Taking into account previous investigations, only samples which were made in accordance with the recommendations of the Serbian Building code requirements for concrete and reinforced concrete - BAB 87 and European norms EN 206-1 were tested. Regarding water absorption, it is expected that in the case of established production all types of concrete would be integrated into class 2 according to EN. Also, for two representative types of concrete with different air content and degree of damage done by destructive test, non-destructive test by device RapidAir 457 was done (specific surface, spacing factor, void frequency and average chord length).",
publisher = "Procema SA",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Durability of concrete with different types of cement",
pages = "221-215",
number = "2",
volume = "46",
url = "https://hdl.handle.net/21.15107/rcub_rims_299"
}
Janković, K., Lončar, L., Bojović, D.,& Stojanović, M.. (2016). Durability of concrete with different types of cement. in Revista Romana de Materiale/ Romanian Journal of Materials
Procema SA., 46(2), 215-221.
https://hdl.handle.net/21.15107/rcub_rims_299
Janković K, Lončar L, Bojović D, Stojanović M. Durability of concrete with different types of cement. in Revista Romana de Materiale/ Romanian Journal of Materials. 2016;46(2):215-221.
https://hdl.handle.net/21.15107/rcub_rims_299 .
Janković, Ksenija, Lončar, Ljiljana, Bojović, Dragan, Stojanović, Marko, "Durability of concrete with different types of cement" in Revista Romana de Materiale/ Romanian Journal of Materials, 46, no. 2 (2016):215-221,
https://hdl.handle.net/21.15107/rcub_rims_299 .
1
2

The influence of nano-silica and barite aggregate on properties of ultra high performance concrete

Janković, Ksenija; Stanković, Srboljub J.; Bojović, Dragan; Stojanović, Marko; Antić Aranđelović, Lana

(Elsevier Sci Ltd, Oxford, 2016)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Stanković, Srboljub J.
AU  - Bojović, Dragan
AU  - Stojanović, Marko
AU  - Antić Aranđelović, Lana
PY  - 2016
UR  - http://rims.institutims.rs/handle/123456789/295
AB  - The development of building materials with improved characteristics and their application for increasing structure durability and sustainability is one of the goals in construction sector. The main objective of this paper is to evaluate the influence of nano-silica replacement of cement (2% or 5%) and aggregate type (quartz, barite or its combination 50:50 by volume) on the properties of ultra high performance concrete (UHPC). UHPC with nano-silica and combination of barite and quartz aggregate is composite which has finer pore-size distribution, improvement in compressive and flexural strength and in radiation protection characteristics, with potential usage as building material for hospitals and nuclear facilities.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - The influence of nano-silica and barite aggregate on properties of ultra high performance concrete
EP  - 156
SP  - 147
VL  - 126
DO  - 10.1016/j.conbuildmat.2016.09.026
ER  - 
@article{
author = "Janković, Ksenija and Stanković, Srboljub J. and Bojović, Dragan and Stojanović, Marko and Antić Aranđelović, Lana",
year = "2016",
abstract = "The development of building materials with improved characteristics and their application for increasing structure durability and sustainability is one of the goals in construction sector. The main objective of this paper is to evaluate the influence of nano-silica replacement of cement (2% or 5%) and aggregate type (quartz, barite or its combination 50:50 by volume) on the properties of ultra high performance concrete (UHPC). UHPC with nano-silica and combination of barite and quartz aggregate is composite which has finer pore-size distribution, improvement in compressive and flexural strength and in radiation protection characteristics, with potential usage as building material for hospitals and nuclear facilities.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "The influence of nano-silica and barite aggregate on properties of ultra high performance concrete",
pages = "156-147",
volume = "126",
doi = "10.1016/j.conbuildmat.2016.09.026"
}
Janković, K., Stanković, S. J., Bojović, D., Stojanović, M.,& Antić Aranđelović, L.. (2016). The influence of nano-silica and barite aggregate on properties of ultra high performance concrete. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 126, 147-156.
https://doi.org/10.1016/j.conbuildmat.2016.09.026
Janković K, Stanković SJ, Bojović D, Stojanović M, Antić Aranđelović L. The influence of nano-silica and barite aggregate on properties of ultra high performance concrete. in Construction and Building Materials. 2016;126:147-156.
doi:10.1016/j.conbuildmat.2016.09.026 .
Janković, Ksenija, Stanković, Srboljub J., Bojović, Dragan, Stojanović, Marko, Antić Aranđelović, Lana, "The influence of nano-silica and barite aggregate on properties of ultra high performance concrete" in Construction and Building Materials, 126 (2016):147-156,
https://doi.org/10.1016/j.conbuildmat.2016.09.026 . .
1
99
55
103

Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica

Ilić, Biljana; Radonjanin, Vlastimir; Malešev, Mirjana; Zdujić, Miodrag; Mitrović, Aleksandra

(Elsevier Science Bv, Amsterdam, 2016)

TY  - JOUR
AU  - Ilić, Biljana
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
AU  - Mitrović, Aleksandra
PY  - 2016
UR  - http://rims.institutims.rs/handle/123456789/297
AB  - Kaolin from a Serbian deposit, characterized by high content of impurities, such as mica and quartz, disordered kaolinite and high specific surface area, was subjected to thermal and mechanical activation on a large scale. Activations were carried out with a goal to investigate the effects of applied methods on the chemical, structural and morphological changes that occurred in the kaolin, and their influence on the pozzolanic activity. The changes were monitored using XRD, FTIR, TG/DTA, PSD, BET and SEM analyses. Pozzolanic activity was evaluated by determination of the 7-day compressive strength conducted on the lime mortars. The results showed that mechanical activation by milling the kaolin for 20 h in the conventional horizontal ball mill was competitive for obtaining pozzolana as thermal activation. Pozzolanic activity of thermally activated kaolin was mainly influenced by formation of metakaolin. Combined effects (such as significant specific surface area increase, as well as partial kaolinite and complete mica phase amorphization) were dominant in pozzolanic activity of mechanically activated kaolin.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Clay Science
T1  - Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica
EP  - 181
SP  - 173
VL  - 123
DO  - 10.1016/j.clay.2016.01.029
ER  - 
@article{
author = "Ilić, Biljana and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag and Mitrović, Aleksandra",
year = "2016",
abstract = "Kaolin from a Serbian deposit, characterized by high content of impurities, such as mica and quartz, disordered kaolinite and high specific surface area, was subjected to thermal and mechanical activation on a large scale. Activations were carried out with a goal to investigate the effects of applied methods on the chemical, structural and morphological changes that occurred in the kaolin, and their influence on the pozzolanic activity. The changes were monitored using XRD, FTIR, TG/DTA, PSD, BET and SEM analyses. Pozzolanic activity was evaluated by determination of the 7-day compressive strength conducted on the lime mortars. The results showed that mechanical activation by milling the kaolin for 20 h in the conventional horizontal ball mill was competitive for obtaining pozzolana as thermal activation. Pozzolanic activity of thermally activated kaolin was mainly influenced by formation of metakaolin. Combined effects (such as significant specific surface area increase, as well as partial kaolinite and complete mica phase amorphization) were dominant in pozzolanic activity of mechanically activated kaolin.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Clay Science",
title = "Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica",
pages = "181-173",
volume = "123",
doi = "10.1016/j.clay.2016.01.029"
}
Ilić, B., Radonjanin, V., Malešev, M., Zdujić, M.,& Mitrović, A.. (2016). Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica. in Applied Clay Science
Elsevier Science Bv, Amsterdam., 123, 173-181.
https://doi.org/10.1016/j.clay.2016.01.029
Ilić B, Radonjanin V, Malešev M, Zdujić M, Mitrović A. Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica. in Applied Clay Science. 2016;123:173-181.
doi:10.1016/j.clay.2016.01.029 .
Ilić, Biljana, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, Mitrović, Aleksandra, "Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica" in Applied Clay Science, 123 (2016):173-181,
https://doi.org/10.1016/j.clay.2016.01.029 . .
108
60
109

The influence of silica fume and curing regime on some properties of concrete

Janković, Ksenija; Ilić, Anđelija; Stojanović, Marko

(2014)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Ilić, Anđelija
AU  - Stojanović, Marko
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/247
AB  - The investigation of posibilities of concrete structure modification by silica fume to improve concrete properties was presented in this report. Percentage of silica fume in regard to cement varied between 0% and 20%. Concrete was cured as follows: in water, steam curing regime at +60 degrees C and +90 degrees C. The results of the compressive and tensile strength, freeze / thaw resistance with de-icing salts, and depth of penetration of water under pressure.
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - The influence of silica fume and curing regime on some properties of concrete
EP  - 53
IS  - 1
SP  - 46
VL  - 44
UR  - https://hdl.handle.net/21.15107/rcub_rims_247
ER  - 
@article{
author = "Janković, Ksenija and Ilić, Anđelija and Stojanović, Marko",
year = "2014",
abstract = "The investigation of posibilities of concrete structure modification by silica fume to improve concrete properties was presented in this report. Percentage of silica fume in regard to cement varied between 0% and 20%. Concrete was cured as follows: in water, steam curing regime at +60 degrees C and +90 degrees C. The results of the compressive and tensile strength, freeze / thaw resistance with de-icing salts, and depth of penetration of water under pressure.",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "The influence of silica fume and curing regime on some properties of concrete",
pages = "53-46",
number = "1",
volume = "44",
url = "https://hdl.handle.net/21.15107/rcub_rims_247"
}
Janković, K., Ilić, A.,& Stojanović, M.. (2014). The influence of silica fume and curing regime on some properties of concrete. in Revista Romana de Materiale/ Romanian Journal of Materials, 44(1), 46-53.
https://hdl.handle.net/21.15107/rcub_rims_247
Janković K, Ilić A, Stojanović M. The influence of silica fume and curing regime on some properties of concrete. in Revista Romana de Materiale/ Romanian Journal of Materials. 2014;44(1):46-53.
https://hdl.handle.net/21.15107/rcub_rims_247 .
Janković, Ksenija, Ilić, Anđelija, Stojanović, Marko, "The influence of silica fume and curing regime on some properties of concrete" in Revista Romana de Materiale/ Romanian Journal of Materials, 44, no. 1 (2014):46-53,
https://hdl.handle.net/21.15107/rcub_rims_247 .
2
2

Investigation of the mortar and concrete resistance in aggressive solutions

Janković, Ksenija; Miličić, Ljiljana; Stanković, Srboljub J.; Šušić, Nenad

(Univ Osijek, Tech Fac, Slavonski Brod, 2014)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Miličić, Ljiljana
AU  - Stanković, Srboljub J.
AU  - Šušić, Nenad
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/227
AB  - Testing the influence of two aggressive solutions - sulphate and nitrate on mortar and concrete was presented in this paper. Experimental work included testing of mortar prisms with 5 % special admixture. Also, four types of concrete were exposed to aggressive solutions. The chemical resistance was tested according to the Koch-Steinegger method. As a condition for resistance in aggressive solution means that flexural strength of mortar prisms is no less than 70 % of referent prisms cured in water it can be concluded that mortar and concrete made with combination of cement and admixture presented in this investigation are not resistant to ammonium nitrate solution, but are resistant to sulphate corrosion.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnicki Vjesnik-Technical Gazette
T1  - Investigation of the mortar and concrete resistance in aggressive solutions
EP  - 176
IS  - 1
SP  - 173
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_vinar_5903
ER  - 
@article{
author = "Janković, Ksenija and Miličić, Ljiljana and Stanković, Srboljub J. and Šušić, Nenad",
year = "2014",
abstract = "Testing the influence of two aggressive solutions - sulphate and nitrate on mortar and concrete was presented in this paper. Experimental work included testing of mortar prisms with 5 % special admixture. Also, four types of concrete were exposed to aggressive solutions. The chemical resistance was tested according to the Koch-Steinegger method. As a condition for resistance in aggressive solution means that flexural strength of mortar prisms is no less than 70 % of referent prisms cured in water it can be concluded that mortar and concrete made with combination of cement and admixture presented in this investigation are not resistant to ammonium nitrate solution, but are resistant to sulphate corrosion.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnicki Vjesnik-Technical Gazette",
title = "Investigation of the mortar and concrete resistance in aggressive solutions",
pages = "176-173",
number = "1",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_vinar_5903"
}
Janković, K., Miličić, L., Stanković, S. J.,& Šušić, N.. (2014). Investigation of the mortar and concrete resistance in aggressive solutions. in Tehnicki Vjesnik-Technical Gazette
Univ Osijek, Tech Fac, Slavonski Brod., 21(1), 173-176.
https://hdl.handle.net/21.15107/rcub_vinar_5903
Janković K, Miličić L, Stanković SJ, Šušić N. Investigation of the mortar and concrete resistance in aggressive solutions. in Tehnicki Vjesnik-Technical Gazette. 2014;21(1):173-176.
https://hdl.handle.net/21.15107/rcub_vinar_5903 .
Janković, Ksenija, Miličić, Ljiljana, Stanković, Srboljub J., Šušić, Nenad, "Investigation of the mortar and concrete resistance in aggressive solutions" in Tehnicki Vjesnik-Technical Gazette, 21, no. 1 (2014):173-176,
https://hdl.handle.net/21.15107/rcub_vinar_5903 .
4
5

Properties of composite cement with commercial and manufactured metakaolin

Mitrović, Aleksandra; Nikolić, Dragan; Miličić, Ljiljana; Bojović, Dragan

(Univ Osijek, Tech Fac, Slavonski Brod, 2013)

TY  - JOUR
AU  - Mitrović, Aleksandra
AU  - Nikolić, Dragan
AU  - Miličić, Ljiljana
AU  - Bojović, Dragan
PY  - 2013
UR  - http://rims.institutims.rs/handle/123456789/213
AB  - Metakaolin composite cements were prepared with 5 to 35 % replacement of ordinary Portland cement with metakaolin (MK), manufactured by thermal activation/calcination of domestic kaolin clay, and commercial matakaolin (CMK). Performance of the composite cements was evaluated through the setting time (initial and final), compressive strengths (for ages 2, 7, 28, 90 and 180 days) and soundness, and compared with control cement (Portland cement - CEM I). After 28 days, compressive strength was higher than that for control cement for cements prepared with addition of CMK, and with addition of up to 25 % MK.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnicki Vjesnik-Technical Gazette
T1  - Properties of composite cement with commercial and manufactured metakaolin
EP  - 687
IS  - 4
SP  - 683
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_rims_213
ER  - 
@article{
author = "Mitrović, Aleksandra and Nikolić, Dragan and Miličić, Ljiljana and Bojović, Dragan",
year = "2013",
abstract = "Metakaolin composite cements were prepared with 5 to 35 % replacement of ordinary Portland cement with metakaolin (MK), manufactured by thermal activation/calcination of domestic kaolin clay, and commercial matakaolin (CMK). Performance of the composite cements was evaluated through the setting time (initial and final), compressive strengths (for ages 2, 7, 28, 90 and 180 days) and soundness, and compared with control cement (Portland cement - CEM I). After 28 days, compressive strength was higher than that for control cement for cements prepared with addition of CMK, and with addition of up to 25 % MK.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnicki Vjesnik-Technical Gazette",
title = "Properties of composite cement with commercial and manufactured metakaolin",
pages = "687-683",
number = "4",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_rims_213"
}
Mitrović, A., Nikolić, D., Miličić, L.,& Bojović, D.. (2013). Properties of composite cement with commercial and manufactured metakaolin. in Tehnicki Vjesnik-Technical Gazette
Univ Osijek, Tech Fac, Slavonski Brod., 20(4), 683-687.
https://hdl.handle.net/21.15107/rcub_rims_213
Mitrović A, Nikolić D, Miličić L, Bojović D. Properties of composite cement with commercial and manufactured metakaolin. in Tehnicki Vjesnik-Technical Gazette. 2013;20(4):683-687.
https://hdl.handle.net/21.15107/rcub_rims_213 .
Mitrović, Aleksandra, Nikolić, Dragan, Miličić, Ljiljana, Bojović, Dragan, "Properties of composite cement with commercial and manufactured metakaolin" in Tehnicki Vjesnik-Technical Gazette, 20, no. 4 (2013):683-687,
https://hdl.handle.net/21.15107/rcub_rims_213 .
2
5

Concrete paving blocks and flags made with crushed brick as aggregate

Janković, Ksenija; Nikolić, D.; Bojović, Dragan

(2012)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Nikolić, D.
AU  - Bojović, Dragan
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/170
AB  - Demolition of old buildings in urban cores has produced a large amount of waste material. Since they are mostly masonry structures the largest part of the waste material is ceramic waste. Besides that, ceramic waste is obtained as a byproduct in the ceramic industry. All of this initiated a research for the application of concrete with recycled brick as aggregate. In this paper, the possibility of using crushed bricks in the production of concrete elements for the pedestrian zone is shown. The application of recycled brick as aggregate, produces concrete of less density and strength, and of increased absorption. All of this also has an effect on the quality of concrete flags and paving blocks. Based on the results obtained by testing the resistance to frost of concrete it was assumed that it is possible to get the products comply with European standards. The results show that replacing up to a 32.5% of natural aggregate with crushed brick aggregate produces concrete blocks, and up to 65% of it produces concrete paving flags which meet the requirements of European standards.
T2  - Construction and Building Materials
T1  - Concrete paving blocks and flags made with crushed brick as aggregate
EP  - 663
IS  - 1
SP  - 659
VL  - 28
DO  - 10.1016/j.conbuildmat.2011.10.036
ER  - 
@article{
author = "Janković, Ksenija and Nikolić, D. and Bojović, Dragan",
year = "2012",
abstract = "Demolition of old buildings in urban cores has produced a large amount of waste material. Since they are mostly masonry structures the largest part of the waste material is ceramic waste. Besides that, ceramic waste is obtained as a byproduct in the ceramic industry. All of this initiated a research for the application of concrete with recycled brick as aggregate. In this paper, the possibility of using crushed bricks in the production of concrete elements for the pedestrian zone is shown. The application of recycled brick as aggregate, produces concrete of less density and strength, and of increased absorption. All of this also has an effect on the quality of concrete flags and paving blocks. Based on the results obtained by testing the resistance to frost of concrete it was assumed that it is possible to get the products comply with European standards. The results show that replacing up to a 32.5% of natural aggregate with crushed brick aggregate produces concrete blocks, and up to 65% of it produces concrete paving flags which meet the requirements of European standards.",
journal = "Construction and Building Materials",
title = "Concrete paving blocks and flags made with crushed brick as aggregate",
pages = "663-659",
number = "1",
volume = "28",
doi = "10.1016/j.conbuildmat.2011.10.036"
}
Janković, K., Nikolić, D.,& Bojović, D.. (2012). Concrete paving blocks and flags made with crushed brick as aggregate. in Construction and Building Materials, 28(1), 659-663.
https://doi.org/10.1016/j.conbuildmat.2011.10.036
Janković K, Nikolić D, Bojović D. Concrete paving blocks and flags made with crushed brick as aggregate. in Construction and Building Materials. 2012;28(1):659-663.
doi:10.1016/j.conbuildmat.2011.10.036 .
Janković, Ksenija, Nikolić, D., Bojović, Dragan, "Concrete paving blocks and flags made with crushed brick as aggregate" in Construction and Building Materials, 28, no. 1 (2012):659-663,
https://doi.org/10.1016/j.conbuildmat.2011.10.036 . .
57
24
56

Monte Carlo Analysis of the Influence of Different Packaging on MOSFET Energy Response to X-rays and Gamma Radiation

Stanković, Srboljub J.; Ilić, R. D.; Živanović, M.; Janković, Ksenija; Lončar, B.

(Polish Acad Sciences Inst Physics, Warsaw, 2012)

TY  - JOUR
AU  - Stanković, Srboljub J.
AU  - Ilić, R. D.
AU  - Živanović, M.
AU  - Janković, Ksenija
AU  - Lončar, B.
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/169
AB  - Radiation sensing MOSFETs have found numerous applications as detectors or device components in radiation fields used in nuclear industry, medical applications and space research. Monte Carlo simulations of MOSFET energy response to X-ray and gamma radiation for different packaging were performed. The photon transport Monte Carlo software FOTELP-2K10 has been adapted to obtain the energy deposited in MOSFET structure with microscopic dimensions. In this work the ratio between values of total energy deposited in the sensitive volume (thick SiO2 layer) for cases of MOSFET structure with and without package lid is presented. For this purpose is defined the shielding energy dependence factor (SDEF), and gave its value for kovar and Ti-24Al-11Nb and Ti-13Nb-13Zr alloys as lid materials.
PB  - Polish Acad Sciences Inst Physics, Warsaw
T2  - Acta Physica Polonica A
T1  - Monte Carlo Analysis of the Influence of Different Packaging on MOSFET Energy Response to X-rays and Gamma Radiation
EP  - 658
IS  - 4
SP  - 655
VL  - 122
DO  - 10.12693/APhysPolA.122.655
ER  - 
@article{
author = "Stanković, Srboljub J. and Ilić, R. D. and Živanović, M. and Janković, Ksenija and Lončar, B.",
year = "2012",
abstract = "Radiation sensing MOSFETs have found numerous applications as detectors or device components in radiation fields used in nuclear industry, medical applications and space research. Monte Carlo simulations of MOSFET energy response to X-ray and gamma radiation for different packaging were performed. The photon transport Monte Carlo software FOTELP-2K10 has been adapted to obtain the energy deposited in MOSFET structure with microscopic dimensions. In this work the ratio between values of total energy deposited in the sensitive volume (thick SiO2 layer) for cases of MOSFET structure with and without package lid is presented. For this purpose is defined the shielding energy dependence factor (SDEF), and gave its value for kovar and Ti-24Al-11Nb and Ti-13Nb-13Zr alloys as lid materials.",
publisher = "Polish Acad Sciences Inst Physics, Warsaw",
journal = "Acta Physica Polonica A",
title = "Monte Carlo Analysis of the Influence of Different Packaging on MOSFET Energy Response to X-rays and Gamma Radiation",
pages = "658-655",
number = "4",
volume = "122",
doi = "10.12693/APhysPolA.122.655"
}
Stanković, S. J., Ilić, R. D., Živanović, M., Janković, K.,& Lončar, B.. (2012). Monte Carlo Analysis of the Influence of Different Packaging on MOSFET Energy Response to X-rays and Gamma Radiation. in Acta Physica Polonica A
Polish Acad Sciences Inst Physics, Warsaw., 122(4), 655-658.
https://doi.org/10.12693/APhysPolA.122.655
Stanković SJ, Ilić RD, Živanović M, Janković K, Lončar B. Monte Carlo Analysis of the Influence of Different Packaging on MOSFET Energy Response to X-rays and Gamma Radiation. in Acta Physica Polonica A. 2012;122(4):655-658.
doi:10.12693/APhysPolA.122.655 .
Stanković, Srboljub J., Ilić, R. D., Živanović, M., Janković, Ksenija, Lončar, B., "Monte Carlo Analysis of the Influence of Different Packaging on MOSFET Energy Response to X-rays and Gamma Radiation" in Acta Physica Polonica A, 122, no. 4 (2012):655-658,
https://doi.org/10.12693/APhysPolA.122.655 . .
2
3
3

Application of neural networks in determination of compressive strength of concrete

Bojović, Dragan; Jevtić, Dragica; Knežević, Milos

(2012)

TY  - JOUR
AU  - Bojović, Dragan
AU  - Jevtić, Dragica
AU  - Knežević, Milos
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/161
AB  - This paper presents the optimization of concrete mixtures composition related to a physical property and the process of production of trial mix design by using the multi-layered feed-forward neural networks. This optimization was conducted because there is no clear method of designing concrete mixture composition and for the purpose of shortening procedure of the trial mix design of concrete. Mix design depend on many variables and deterministic models cannot give good results. The goal of the research was to make a model of a neural network, on the set of available data from 288 trial mix, which would, with highest accuracy, predict the compressive strength of concrete at the age of 28 days. In order to attain as high accuracy of obtained results as possible, three levels of input data to the neural networks were considered. On each of the applied groups of input data, the neural networks with 1 and 2 hidden layers were formed. On the basis of the adopted neural network, an algorithm for usage of the network in actual situations was made, applied on an actual model.
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Application of neural networks in determination of compressive strength of concrete
EP  - 22
IS  - 1
SP  - 16
VL  - 42
UR  - https://hdl.handle.net/21.15107/rcub_rims_161
ER  - 
@article{
author = "Bojović, Dragan and Jevtić, Dragica and Knežević, Milos",
year = "2012",
abstract = "This paper presents the optimization of concrete mixtures composition related to a physical property and the process of production of trial mix design by using the multi-layered feed-forward neural networks. This optimization was conducted because there is no clear method of designing concrete mixture composition and for the purpose of shortening procedure of the trial mix design of concrete. Mix design depend on many variables and deterministic models cannot give good results. The goal of the research was to make a model of a neural network, on the set of available data from 288 trial mix, which would, with highest accuracy, predict the compressive strength of concrete at the age of 28 days. In order to attain as high accuracy of obtained results as possible, three levels of input data to the neural networks were considered. On each of the applied groups of input data, the neural networks with 1 and 2 hidden layers were formed. On the basis of the adopted neural network, an algorithm for usage of the network in actual situations was made, applied on an actual model.",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Application of neural networks in determination of compressive strength of concrete",
pages = "22-16",
number = "1",
volume = "42",
url = "https://hdl.handle.net/21.15107/rcub_rims_161"
}
Bojović, D., Jevtić, D.,& Knežević, M.. (2012). Application of neural networks in determination of compressive strength of concrete. in Revista Romana de Materiale/ Romanian Journal of Materials, 42(1), 16-22.
https://hdl.handle.net/21.15107/rcub_rims_161
Bojović D, Jevtić D, Knežević M. Application of neural networks in determination of compressive strength of concrete. in Revista Romana de Materiale/ Romanian Journal of Materials. 2012;42(1):16-22.
https://hdl.handle.net/21.15107/rcub_rims_161 .
Bojović, Dragan, Jevtić, Dragica, Knežević, Milos, "Application of neural networks in determination of compressive strength of concrete" in Revista Romana de Materiale/ Romanian Journal of Materials, 42, no. 1 (2012):16-22,
https://hdl.handle.net/21.15107/rcub_rims_161 .
3
5

Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures

Janković, Ksenija; Cirović, Goran; Nikolić, Dragan; Bojović, Dragan

(2011)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Cirović, Goran
AU  - Nikolić, Dragan
AU  - Bojović, Dragan
PY  - 2011
UR  - http://rims.institutims.rs/handle/123456789/149
AB  - Preparation and microstructure of ultra high performance concrete (UHPC) have been intensively analyzed In the last few years. The mechanical properties (compressive strength and flexural strength) were investigated under different curing conditions (standard and steam curing). Silica fumes have characteristics that make them necessary in cement composites with ultra strength properties. The search for substitute products thus appears important if the use of UHPC is to become more widespread in the concrete industry. Possibilities of making ultra high performance self compacting concrete (UHPSCC) with materials available in Serbia, based on experimental work are discussed in this paper. Three series of samples were made with different types of fine reactive additives (silica fume was replaced with metakaolin at 20% and 40% and with fine fly ash at 20%). The produced mixes had self compacted consistency. The 28(th) day compressive strength varied between 165 and 195 MPa for the heat treated specimens and between 135 and 150 MPa for the ones that had not been heat treated. Furthermore, this paper presents SEM micrographs of C-S-H phase formed after steam curing and super-heated steam under preassure.
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures
EP  - 218
IS  - 3
SP  - 211
VL  - 41
UR  - https://hdl.handle.net/21.15107/rcub_rims_149
ER  - 
@article{
author = "Janković, Ksenija and Cirović, Goran and Nikolić, Dragan and Bojović, Dragan",
year = "2011",
abstract = "Preparation and microstructure of ultra high performance concrete (UHPC) have been intensively analyzed In the last few years. The mechanical properties (compressive strength and flexural strength) were investigated under different curing conditions (standard and steam curing). Silica fumes have characteristics that make them necessary in cement composites with ultra strength properties. The search for substitute products thus appears important if the use of UHPC is to become more widespread in the concrete industry. Possibilities of making ultra high performance self compacting concrete (UHPSCC) with materials available in Serbia, based on experimental work are discussed in this paper. Three series of samples were made with different types of fine reactive additives (silica fume was replaced with metakaolin at 20% and 40% and with fine fly ash at 20%). The produced mixes had self compacted consistency. The 28(th) day compressive strength varied between 165 and 195 MPa for the heat treated specimens and between 135 and 150 MPa for the ones that had not been heat treated. Furthermore, this paper presents SEM micrographs of C-S-H phase formed after steam curing and super-heated steam under preassure.",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures",
pages = "218-211",
number = "3",
volume = "41",
url = "https://hdl.handle.net/21.15107/rcub_rims_149"
}
Janković, K., Cirović, G., Nikolić, D.,& Bojović, D.. (2011). Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures. in Revista Romana de Materiale/ Romanian Journal of Materials, 41(3), 211-218.
https://hdl.handle.net/21.15107/rcub_rims_149
Janković K, Cirović G, Nikolić D, Bojović D. Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures. in Revista Romana de Materiale/ Romanian Journal of Materials. 2011;41(3):211-218.
https://hdl.handle.net/21.15107/rcub_rims_149 .
Janković, Ksenija, Cirović, Goran, Nikolić, Dragan, Bojović, Dragan, "Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures" in Revista Romana de Materiale/ Romanian Journal of Materials, 41, no. 3 (2011):211-218,
https://hdl.handle.net/21.15107/rcub_rims_149 .
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