TY  - JOUR
AU  - Vasić, Miloš
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/580
AB  - In order to rate the drying behavior of different clay raw materials it is necessary to establish
the criteria for comparison. Mineralogical composition, clay minerals content, particle size
distribution, packing, porosity, forming procedure, and raw material aging are known as
intrinsic parameters. Due to the fact that these parameters are cross linked and are usually
inter-dependently related to each other, the attempts to set up a criteria for correlation between
intrinsic parameters and drying sensitivity has been limited. That was the reason why the
estimation of the cracking tendency was linked with the easiness of the drying process in each
reported method. The most applied methods for estimation of the drying sensitivity of clays in
the ceramic industry were proposed by Bigot, Ratzenberger, Piltz, Hermansson and Varlamov.
The fact that previously mentioned methods were not compared up till know has defined the
main objective of this study. The only reported comparison was between Bigot and Ratzenberg
drying sensitivity index. The second objective of this review was to present these methods and to
estimate the drying behavior of tree different clay raw material. It was confirmed that Varlamov
method is very simple, accurate and fast. It is correlated with the mineralogical composition of
clay and cannot be used for description of the drying kinetic. The other two models can provide
info about the drying kinetic. Piltz model is the most relevant for describing the drying behavior at
the beginning of the drying. The results have confirmed that the most suitable conclusion about
the drying behavior of the tested clays is obtained when results from Bigot, Piltz and Varlamov
methods are available.
T2  - Epitőanyag – Journal of Silicate Based and Composite Materials
T1  - Estimation of the drying behaviour for different clay raw materials - drying sensitivity techniques review Epitoanyang 2022
EP  - 92
IS  - 3
SP  - 88
VL  - 74
DO  - 10.14382/epitoanyag-jsbcm.2022.14
ER  - 

@article{
author = "Vasić, Miloš",
year = "2022",
abstract = "In order to rate the drying behavior of different clay raw materials it is necessary to establish
the criteria for comparison. Mineralogical composition, clay minerals content, particle size
distribution, packing, porosity, forming procedure, and raw material aging are known as
intrinsic parameters. Due to the fact that these parameters are cross linked and are usually
inter-dependently related to each other, the attempts to set up a criteria for correlation between
intrinsic parameters and drying sensitivity has been limited. That was the reason why the
estimation of the cracking tendency was linked with the easiness of the drying process in each
reported method. The most applied methods for estimation of the drying sensitivity of clays in
the ceramic industry were proposed by Bigot, Ratzenberger, Piltz, Hermansson and Varlamov.
The fact that previously mentioned methods were not compared up till know has defined the
main objective of this study. The only reported comparison was between Bigot and Ratzenberg
drying sensitivity index. The second objective of this review was to present these methods and to
estimate the drying behavior of tree different clay raw material. It was confirmed that Varlamov
method is very simple, accurate and fast. It is correlated with the mineralogical composition of
clay and cannot be used for description of the drying kinetic. The other two models can provide
info about the drying kinetic. Piltz model is the most relevant for describing the drying behavior at
the beginning of the drying. The results have confirmed that the most suitable conclusion about
the drying behavior of the tested clays is obtained when results from Bigot, Piltz and Varlamov
methods are available.",
journal = "Epitőanyag – Journal of Silicate Based and Composite Materials",
title = "Estimation of the drying behaviour for different clay raw materials - drying sensitivity techniques review Epitoanyang 2022",
pages = "92-88",
number = "3",
volume = "74",
doi = "10.14382/epitoanyag-jsbcm.2022.14"
}

Vasić, M.. (2022). Estimation of the drying behaviour for different clay raw materials - drying sensitivity techniques review Epitoanyang 2022. in Epitőanyag – Journal of Silicate Based and Composite Materials, 74(3), 88-92.
https://doi.org/10.14382/epitoanyag-jsbcm.2022.14

Vasić M. Estimation of the drying behaviour for different clay raw materials - drying sensitivity techniques review Epitoanyang 2022. in Epitőanyag – Journal of Silicate Based and Composite Materials. 2022;74(3):88-92.
doi:10.14382/epitoanyag-jsbcm.2022.14 .

Vasić, Miloš, "Estimation of the drying behaviour for different clay raw materials - drying sensitivity techniques review Epitoanyang 2022" in Epitőanyag – Journal of Silicate Based and Composite Materials, 74, no. 3 (2022):88-92,
https://doi.org/10.14382/epitoanyag-jsbcm.2022.14 . .

TY  - CONF
AU  - Vasić, Miloš
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/579
AB  - This paper goal was to increase the quality of the drying ware and to lower the drying scarp rate in one local brick factory. The registration of drying air parameters (temperature, humidity and velocity) along the dryer channels as well as the drying ware linear shrinkage and mass change were monitored for a month. Material and Energy balances were also recorded. Results have revealed that the drying air humidity and temperature profiles were not evenly distributed along the height of the drying tunnels. The ambient air breakthrough into the dryer was experimentally identified and quantified. It was the cause of the product quality deterioration and the reason why the critical and residual moisture in some of the products was larger than the desired one. Based on monitored data and mass and energy balances a solution was proposed for preventing the “false” air breakthrough, upgrade of the existing dryer fans and installation of the novel, measuring equipment. A hypothetical solution for increasing the capacity of the dryer, which uses the registered material and energy balances as well as factory management expectation, that the production of 50.000 masonry units per day will be achieved soon, was given also.
C3  - Proceedings of International Conference on Modern Technologies in Industrial Engineering (ModTech 2022), Iasi, Romania
T1  - Monitoring and analyzing the classical counter current industrial tunnel dryer for masonry clay units
EP  - 293
IS  - 2
SP  - 286
VL  - 14
DO  - 10.54684/ijmmt.2022.14.2.286
ER  - 

@conference{
author = "Vasić, Miloš",
year = "2022",
abstract = "This paper goal was to increase the quality of the drying ware and to lower the drying scarp rate in one local brick factory. The registration of drying air parameters (temperature, humidity and velocity) along the dryer channels as well as the drying ware linear shrinkage and mass change were monitored for a month. Material and Energy balances were also recorded. Results have revealed that the drying air humidity and temperature profiles were not evenly distributed along the height of the drying tunnels. The ambient air breakthrough into the dryer was experimentally identified and quantified. It was the cause of the product quality deterioration and the reason why the critical and residual moisture in some of the products was larger than the desired one. Based on monitored data and mass and energy balances a solution was proposed for preventing the “false” air breakthrough, upgrade of the existing dryer fans and installation of the novel, measuring equipment. A hypothetical solution for increasing the capacity of the dryer, which uses the registered material and energy balances as well as factory management expectation, that the production of 50.000 masonry units per day will be achieved soon, was given also.",
journal = "Proceedings of International Conference on Modern Technologies in Industrial Engineering (ModTech 2022), Iasi, Romania",
title = "Monitoring and analyzing the classical counter current industrial tunnel dryer for masonry clay units",
pages = "293-286",
number = "2",
volume = "14",
doi = "10.54684/ijmmt.2022.14.2.286"
}

Vasić, M.. (2022). Monitoring and analyzing the classical counter current industrial tunnel dryer for masonry clay units. in Proceedings of International Conference on Modern Technologies in Industrial Engineering (ModTech 2022), Iasi, Romania, 14(2), 286-293.
https://doi.org/10.54684/ijmmt.2022.14.2.286

Vasić M. Monitoring and analyzing the classical counter current industrial tunnel dryer for masonry clay units. in Proceedings of International Conference on Modern Technologies in Industrial Engineering (ModTech 2022), Iasi, Romania. 2022;14(2):286-293.
doi:10.54684/ijmmt.2022.14.2.286 .

Vasić, Miloš, "Monitoring and analyzing the classical counter current industrial tunnel dryer for masonry clay units" in Proceedings of International Conference on Modern Technologies in Industrial Engineering (ModTech 2022), Iasi, Romania, 14, no. 2 (2022):286-293,
https://doi.org/10.54684/ijmmt.2022.14.2.286 . .

TY  - JOUR
AU  - Vasić, Miloš
AU  - Vasić, Milica
AU  - Radojević, Zagorka
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/515
AB  - The industrial raw material compositions in brick
or tile production are normally adapting from time to time
with novel clays. The proper raw material change must be
based on the reliable raw material characterization tests.
Regardless to the fact that commonly used (Bigot, Muller-
Biehl, Ratzenberger, Piltz, Hermansons, etc.) drying
sensitivity criterions allow the comparison of different raw
materials they are not related with the mineral composition
and mechanical nature of clays. Besides these are timedemanding
tests. The X-ray characterization of raw
material is reliable only when orientated samples are
prepared. In other cases, it is necessary to have additional
characterization test such as thermo-differential (DTA) and
thermo-gravimetric (TG) analysis in order to confirm the
presence or absence of individual clay minerals. The
quantity of the interlayer water content present in clays is
in direct correlation with the mineralogical composition
and the clay type. This effect can be easily qualified on the
DTA/TG curves. This was a trigger for establishing the
novel rapid drying sensitivity criteria. The analysis of
different raw materials has confirmed that the moisture
loss registered on TG curves at 2000C can be used as novel
drying sensitivity criterion. This value is respectively for
insensitive raw materials less than 2.0 while for highly
sensitive one is larger than 2.80. The proposed method is
very simple, rapid and reliable for the application in brick
and tile industry. The second objective of this paper was to
compare the results of the proposed method with the
widely used Bigoth, Ratzenberg and Piltz tests. A good
correlation was found.
T2  - International Journal of Modern Manufacturing Technologies
T1  - Novel and rapid drying characterization test suitable for The brick and tile industry
IS  - 3
VL  - 14
DO  - 10.54684/ijmmt.2022.14.3.276
ER  - 

@article{
author = "Vasić, Miloš and Vasić, Milica and Radojević, Zagorka",
year = "2022",
abstract = "The industrial raw material compositions in brick
or tile production are normally adapting from time to time
with novel clays. The proper raw material change must be
based on the reliable raw material characterization tests.
Regardless to the fact that commonly used (Bigot, Muller-
Biehl, Ratzenberger, Piltz, Hermansons, etc.) drying
sensitivity criterions allow the comparison of different raw
materials they are not related with the mineral composition
and mechanical nature of clays. Besides these are timedemanding
tests. The X-ray characterization of raw
material is reliable only when orientated samples are
prepared. In other cases, it is necessary to have additional
characterization test such as thermo-differential (DTA) and
thermo-gravimetric (TG) analysis in order to confirm the
presence or absence of individual clay minerals. The
quantity of the interlayer water content present in clays is
in direct correlation with the mineralogical composition
and the clay type. This effect can be easily qualified on the
DTA/TG curves. This was a trigger for establishing the
novel rapid drying sensitivity criteria. The analysis of
different raw materials has confirmed that the moisture
loss registered on TG curves at 2000C can be used as novel
drying sensitivity criterion. This value is respectively for
insensitive raw materials less than 2.0 while for highly
sensitive one is larger than 2.80. The proposed method is
very simple, rapid and reliable for the application in brick
and tile industry. The second objective of this paper was to
compare the results of the proposed method with the
widely used Bigoth, Ratzenberg and Piltz tests. A good
correlation was found.",
journal = "International Journal of Modern Manufacturing Technologies",
title = "Novel and rapid drying characterization test suitable for The brick and tile industry",
number = "3",
volume = "14",
doi = "10.54684/ijmmt.2022.14.3.276"
}

Vasić, M., Vasić, M.,& Radojević, Z.. (2022). Novel and rapid drying characterization test suitable for The brick and tile industry. in International Journal of Modern Manufacturing Technologies, 14(3).
https://doi.org/10.54684/ijmmt.2022.14.3.276

Vasić M, Vasić M, Radojević Z. Novel and rapid drying characterization test suitable for The brick and tile industry. in International Journal of Modern Manufacturing Technologies. 2022;14(3).
doi:10.54684/ijmmt.2022.14.3.276 .

Vasić, Miloš, Vasić, Milica, Radojević, Zagorka, "Novel and rapid drying characterization test suitable for The brick and tile industry" in International Journal of Modern Manufacturing Technologies, 14, no. 3 (2022),
https://doi.org/10.54684/ijmmt.2022.14.3.276 . .

TY  - JOUR
AU  - Vasić, Miloš
AU  - Vasić, Milica
PY  - 2021
UR  - http://rims.institutims.rs/handle/123456789/581
AB  - Drying has an enormous impact on the quality of final masonry clay elements. The accumulated knowledge about modeling the drying process, as well as the registered progress in computing the coupling between the heat and mass transfer during the last decade has reached the applicative industrial level. The available novel commercial drying solutions have dropped the drying cycle to 5 hours for hollow clay products and up to 9 hours for clay blocks of large size and weight. The ability to speed up the drying process also strongly depends on the properties of the raw materials. The decision on optimization of the existing dryer and its upgrade or investment in a novel drying facility must be experimentally validated. Results of the one-month monitoring and analysis of the production process in one Serbian brick factory including the material and energy balances are given in this paper. Based on the collected data, raw material limitations and costs of the novel dryer the existing tunnel dryer upgrade and the minimization of the "false" ambient air into the dryer are proposed.
T2  - International Journal of Manufacturing Economics and Management
T1  - Optimize, upgrade or invest in novel dryer? – A brick factory case study
VL  - 2(1)
DO  - 10.54684/ijmem.2021.1.2.60
ER  - 

@article{
author = "Vasić, Miloš and Vasić, Milica",
year = "2021",
abstract = "Drying has an enormous impact on the quality of final masonry clay elements. The accumulated knowledge about modeling the drying process, as well as the registered progress in computing the coupling between the heat and mass transfer during the last decade has reached the applicative industrial level. The available novel commercial drying solutions have dropped the drying cycle to 5 hours for hollow clay products and up to 9 hours for clay blocks of large size and weight. The ability to speed up the drying process also strongly depends on the properties of the raw materials. The decision on optimization of the existing dryer and its upgrade or investment in a novel drying facility must be experimentally validated. Results of the one-month monitoring and analysis of the production process in one Serbian brick factory including the material and energy balances are given in this paper. Based on the collected data, raw material limitations and costs of the novel dryer the existing tunnel dryer upgrade and the minimization of the "false" ambient air into the dryer are proposed.",
journal = "International Journal of Manufacturing Economics and Management",
title = "Optimize, upgrade or invest in novel dryer? – A brick factory case study",
volume = "2(1)",
doi = "10.54684/ijmem.2021.1.2.60"
}

Vasić, M.,& Vasić, M.. (2021). Optimize, upgrade or invest in novel dryer? – A brick factory case study. in International Journal of Manufacturing Economics and Management, 2(1).
https://doi.org/10.54684/ijmem.2021.1.2.60

Vasić M, Vasić M. Optimize, upgrade or invest in novel dryer? – A brick factory case study. in International Journal of Manufacturing Economics and Management. 2021;2(1).
doi:10.54684/ijmem.2021.1.2.60 .

Vasić, Miloš, Vasić, Milica, "Optimize, upgrade or invest in novel dryer? – A brick factory case study" in International Journal of Manufacturing Economics and Management, 2(1) (2021),
https://doi.org/10.54684/ijmem.2021.1.2.60 . .

TY  - JOUR
AU  - Vasić, Milica
AU  - Goel, Gaurav
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2021
UR  - http://rims.institutims.rs/handle/123456789/397
AB  - In this study, an optimal mixture of loess brick clays and waste coal dust in laboratory hollow blocks production is determined with the aim of promoting sustainable development in terms of saving resources and energy. The novelty of the work lies in the first-time utilization of waste coal dust in combination with loess soil brick-making thus bolstering European effort on waste utilization. The mentioned is also in line with UN sustainable development goals, SDG 12 and 9. The chemical and mineralogical contents of the clays were obtained using various chemical characterization methods, and thermal behavior by using dilatometry and simultaneous DSC/TG analysis. The important ceramic and technological characteristics of the extruded brick clay and waste coal dust composite samples during molding, drying, and firing were obtained. The chosen mixture of 70 % calcareous clay and 30 % plastic clay to 3 % of high-calorie waste coal dust is found optimal. Industrial-scale optimal blocks (250x190x190 mm(3)) with 60 % of vertical voids were fired in a tunnel kiln, and the firing regime was recorded. It is determined that the regime must be corrected in the firing and cooling zone since the differences measured by thermo-couples were up to 180 degrees C. The industrial prototype was found to be of satisfactory quality meeting the requirements of water absorption and compressive strength as per European and other international standards. The study was first of a kind detailed characterization of the industrial size bricks encompassing waste coal dust and loess brick clays, with the emphasis on the usability in the industry, and additionally recording and correcting of the firing regime in a tunnel kiln. The product is recyclable and can be disposed of safely after the end of life.
PB  - Elsevier, Amsterdam
T2  - Environmental Technology & Innovation
T1  - Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study
VL  - 21
DO  - 10.1016/j.eti.2020.101350
ER  - 

@article{
author = "Vasić, Milica and Goel, Gaurav and Vasić, Miloš and Radojević, Zagorka",
year = "2021",
abstract = "In this study, an optimal mixture of loess brick clays and waste coal dust in laboratory hollow blocks production is determined with the aim of promoting sustainable development in terms of saving resources and energy. The novelty of the work lies in the first-time utilization of waste coal dust in combination with loess soil brick-making thus bolstering European effort on waste utilization. The mentioned is also in line with UN sustainable development goals, SDG 12 and 9. The chemical and mineralogical contents of the clays were obtained using various chemical characterization methods, and thermal behavior by using dilatometry and simultaneous DSC/TG analysis. The important ceramic and technological characteristics of the extruded brick clay and waste coal dust composite samples during molding, drying, and firing were obtained. The chosen mixture of 70 % calcareous clay and 30 % plastic clay to 3 % of high-calorie waste coal dust is found optimal. Industrial-scale optimal blocks (250x190x190 mm(3)) with 60 % of vertical voids were fired in a tunnel kiln, and the firing regime was recorded. It is determined that the regime must be corrected in the firing and cooling zone since the differences measured by thermo-couples were up to 180 degrees C. The industrial prototype was found to be of satisfactory quality meeting the requirements of water absorption and compressive strength as per European and other international standards. The study was first of a kind detailed characterization of the industrial size bricks encompassing waste coal dust and loess brick clays, with the emphasis on the usability in the industry, and additionally recording and correcting of the firing regime in a tunnel kiln. The product is recyclable and can be disposed of safely after the end of life.",
publisher = "Elsevier, Amsterdam",
journal = "Environmental Technology & Innovation",
title = "Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study",
volume = "21",
doi = "10.1016/j.eti.2020.101350"
}

Vasić, M., Goel, G., Vasić, M.,& Radojević, Z.. (2021). Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study. in Environmental Technology & Innovation
Elsevier, Amsterdam., 21.
https://doi.org/10.1016/j.eti.2020.101350

Vasić M, Goel G, Vasić M, Radojević Z. Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study. in Environmental Technology & Innovation. 2021;21.
doi:10.1016/j.eti.2020.101350 .

Vasić, Milica, Goel, Gaurav, Vasić, Miloš, Radojević, Zagorka, "Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study" in Environmental Technology & Innovation, 21 (2021),
https://doi.org/10.1016/j.eti.2020.101350 . .

TY  - GEN
AU  - Vasić, Milica
AU  - Vasić, Miloš
AU  - Mijatović, Nevenka
AU  - Radojević, Zagorka
AU  - Pezo, Lato
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/513
T1  - Optimizacija kompozitne mešavine domaćih prirodnih ilitsko-kaolinitskih glina za primenu u proizvodnji keramičkih pločica
UR  - https://hdl.handle.net/21.15107/rcub_rims_513
ER  - 

@misc{
author = "Vasić, Milica and Vasić, Miloš and Mijatović, Nevenka and Radojević, Zagorka and Pezo, Lato",
year = "2020",
title = "Optimizacija kompozitne mešavine domaćih prirodnih ilitsko-kaolinitskih glina za primenu u proizvodnji keramičkih pločica",
url = "https://hdl.handle.net/21.15107/rcub_rims_513"
}

Vasić, M., Vasić, M., Mijatović, N., Radojević, Z.,& Pezo, L.. (2020). Optimizacija kompozitne mešavine domaćih prirodnih ilitsko-kaolinitskih glina za primenu u proizvodnji keramičkih pločica. .
https://hdl.handle.net/21.15107/rcub_rims_513

Vasić M, Vasić M, Mijatović N, Radojević Z, Pezo L. Optimizacija kompozitne mešavine domaćih prirodnih ilitsko-kaolinitskih glina za primenu u proizvodnji keramičkih pločica. 2020;.
https://hdl.handle.net/21.15107/rcub_rims_513 .

Vasić, Milica, Vasić, Miloš, Mijatović, Nevenka, Radojević, Zagorka, Pezo, Lato, "Optimizacija kompozitne mešavine domaćih prirodnih ilitsko-kaolinitskih glina za primenu u proizvodnji keramičkih pločica" (2020),
https://hdl.handle.net/21.15107/rcub_rims_513 .

TY  - JOUR
AU  - Vasić, Milica
AU  - Pezo, Lato
AU  - Vasić, Miloš
AU  - Mijatović, Nevenka
AU  - Mitrić, Miodrag
AU  - Radojević, Zagorka
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/382
AB  - This study presents the 51 mixtures of ceramic clays characterized by using XRF, XRD, granulometry, and dilatometry analyses. After firing in a 1000-1250 °C range, water absorption (WA) according to EN standards by boiling in water, under vacuum, and by 24 h soaking is determined. The results indicated that there was a high and statistically significant correlation between the standard methods, but the testing under vacuum gave the highest saturation of the samples fired at 1200 °C and 1250 °C. It is determined that these illitic-kaolinitic clays can be used to produce floor ceramic tiles belonging to the BIIa group (water absorption between 3% and 6%). The study also aimed to reveal which method of WA determination is suitable to read the sintering interval from the gresification diagrams, which is compared to the beginning of sintering as read from dilatometry curves.
PB  - Sociedad Espanola de Ceramica y Vidrio
T2  - Boletin de la Sociedad Espanola de Ceramica y Vidrio
T1  - What is the most relevant method for water absorption determination in ceramic tiles produced by illitic-kaolinitic clays? The mystery behind the gresification diagram
DO  - 10.1016/j.bsecv.2020.11.006
ER  - 

@article{
author = "Vasić, Milica and Pezo, Lato and Vasić, Miloš and Mijatović, Nevenka and Mitrić, Miodrag and Radojević, Zagorka",
year = "2020",
abstract = "This study presents the 51 mixtures of ceramic clays characterized by using XRF, XRD, granulometry, and dilatometry analyses. After firing in a 1000-1250 °C range, water absorption (WA) according to EN standards by boiling in water, under vacuum, and by 24 h soaking is determined. The results indicated that there was a high and statistically significant correlation between the standard methods, but the testing under vacuum gave the highest saturation of the samples fired at 1200 °C and 1250 °C. It is determined that these illitic-kaolinitic clays can be used to produce floor ceramic tiles belonging to the BIIa group (water absorption between 3% and 6%). The study also aimed to reveal which method of WA determination is suitable to read the sintering interval from the gresification diagrams, which is compared to the beginning of sintering as read from dilatometry curves.",
publisher = "Sociedad Espanola de Ceramica y Vidrio",
journal = "Boletin de la Sociedad Espanola de Ceramica y Vidrio",
title = "What is the most relevant method for water absorption determination in ceramic tiles produced by illitic-kaolinitic clays? The mystery behind the gresification diagram",
doi = "10.1016/j.bsecv.2020.11.006"
}

Vasić, M., Pezo, L., Vasić, M., Mijatović, N., Mitrić, M.,& Radojević, Z.. (2020). What is the most relevant method for water absorption determination in ceramic tiles produced by illitic-kaolinitic clays? The mystery behind the gresification diagram. in Boletin de la Sociedad Espanola de Ceramica y Vidrio
Sociedad Espanola de Ceramica y Vidrio..
https://doi.org/10.1016/j.bsecv.2020.11.006

Vasić M, Pezo L, Vasić M, Mijatović N, Mitrić M, Radojević Z. What is the most relevant method for water absorption determination in ceramic tiles produced by illitic-kaolinitic clays? The mystery behind the gresification diagram. in Boletin de la Sociedad Espanola de Ceramica y Vidrio. 2020;.
doi:10.1016/j.bsecv.2020.11.006 .

Vasić, Milica, Pezo, Lato, Vasić, Miloš, Mijatović, Nevenka, Mitrić, Miodrag, Radojević, Zagorka, "What is the most relevant method for water absorption determination in ceramic tiles produced by illitic-kaolinitic clays? The mystery behind the gresification diagram" in Boletin de la Sociedad Espanola de Ceramica y Vidrio (2020),
https://doi.org/10.1016/j.bsecv.2020.11.006 . .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/389
AB  - The general method for industrial chamber dryer optimization was reported in this paper. The first step in finding the most suitable drying regime is to characterized the clay raw material, especially its water loss at 2000C and to determine the critical drying rate inside the specially constructed laboratory dryer. These data provides us information if the product or the dryer is the bottleneck for the optimisation. If the optimization is justified geometry of the dryer, air mass flows, temperature, and humidity profiles inside the dryer as well as initial water content in the drying material, initial temperature of the products and the load of the dryer are required. Some of the previously mentioned data are only used to check if the chamber dryer is working properly, while the others are used as the initial parameters necessary for software simulation. In this paper two models for calculating the optimal drying parameters were used. The first model was developed from the comprehensive theory of the moisture migration during isothermal drying. The calculation software for setting up the non - isothermal drying regimes was reported in our previous papers. It is important to say that this model was not able to adequately predict the temperature raise within the drying products. In order to simulate the raise of the temperature of the roofing tiles during drying the second model was used. This simple receding drying front model was firstly reported by Kitcher. If both models are used simultaneously it is possible to calculate air temperatures, product temperature, absolute and relative humidity of the drying air, moisture content of the product, drying rate etc ... It is important to mention that this approach can lead to the recommendations for changes inside the dryer before an optimized situation is achieved. One example of such situations is described in this paper in details.
PB  - IOP Publishing Ltd, Bristol
C3  - Modtech International Conference - Modern Technologies in Industrial Engineering VIII
T1  - Characterization of drying behavior and modeling of industrial drying process
VL  - 916
DO  - 10.1088/1757-899X/916/1/012124
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2020",
abstract = "The general method for industrial chamber dryer optimization was reported in this paper. The first step in finding the most suitable drying regime is to characterized the clay raw material, especially its water loss at 2000C and to determine the critical drying rate inside the specially constructed laboratory dryer. These data provides us information if the product or the dryer is the bottleneck for the optimisation. If the optimization is justified geometry of the dryer, air mass flows, temperature, and humidity profiles inside the dryer as well as initial water content in the drying material, initial temperature of the products and the load of the dryer are required. Some of the previously mentioned data are only used to check if the chamber dryer is working properly, while the others are used as the initial parameters necessary for software simulation. In this paper two models for calculating the optimal drying parameters were used. The first model was developed from the comprehensive theory of the moisture migration during isothermal drying. The calculation software for setting up the non - isothermal drying regimes was reported in our previous papers. It is important to say that this model was not able to adequately predict the temperature raise within the drying products. In order to simulate the raise of the temperature of the roofing tiles during drying the second model was used. This simple receding drying front model was firstly reported by Kitcher. If both models are used simultaneously it is possible to calculate air temperatures, product temperature, absolute and relative humidity of the drying air, moisture content of the product, drying rate etc ... It is important to mention that this approach can lead to the recommendations for changes inside the dryer before an optimized situation is achieved. One example of such situations is described in this paper in details.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Modtech International Conference - Modern Technologies in Industrial Engineering VIII",
title = "Characterization of drying behavior and modeling of industrial drying process",
volume = "916",
doi = "10.1088/1757-899X/916/1/012124"
}

Vasić, M.,& Radojević, Z.. (2020). Characterization of drying behavior and modeling of industrial drying process. in Modtech International Conference - Modern Technologies in Industrial Engineering VIII
IOP Publishing Ltd, Bristol., 916.
https://doi.org/10.1088/1757-899X/916/1/012124

Vasić M, Radojević Z. Characterization of drying behavior and modeling of industrial drying process. in Modtech International Conference - Modern Technologies in Industrial Engineering VIII. 2020;916.
doi:10.1088/1757-899X/916/1/012124 .

Vasić, Miloš, Radojević, Zagorka, "Characterization of drying behavior and modeling of industrial drying process" in Modtech International Conference - Modern Technologies in Industrial Engineering VIII, 916 (2020),
https://doi.org/10.1088/1757-899X/916/1/012124 . .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2019
UR  - http://rims.institutims.rs/handle/123456789/366
AB  - Drying is one of the most important steps in the production process of masonry units. In order to prevent the formation of cracks during drying information's about the moisture migration rate variability as well as the material strength variability through drying are necessary. The main goal of this paper was to find a solution how to prevent the crack formation at the beginning (during the first hour) of the drying for the drying sensitive illite raw material. The first step was to record a series of isothermal Deff - MR curves at different drying air temperatures and constant drying air velocity and humidity. As it was already reported all moisture transport mechanisms during isothermal drying are visible on those curves. Characteristic spots registered on these curves were then transposed on the experimentally registered figure material strength us moisture content. It was found that the material strength for the cracked masonry units at the beginning of drying was around 0.09 MPa and that the time of cracking was near the characteristic spot B. Registered material strength and the crack time position (spot B) has additionally confirmed that the drying sensitivity of the raw material are obviously related with the present clay mineral constituents structure and the initial moisture content of the green heavy clay units. Using the Deff values registered for each experiment in the spot B we were able to calculate the maximal moisture transport rate and consequently the proper drying air parameters which are safe and which will not initialize the formation of the cracks at the beginning of the drying.
PB  - IOP Publishing Ltd, Bristol
C3  - Modern Technologies in Industrial Engineering Vii (Modtech2019)
T1  - Method for avoiding cracks during drying of masonry units made of illite raw material
VL  - 591
DO  - 10.1088/1757-899X/591/1/012101
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2019",
abstract = "Drying is one of the most important steps in the production process of masonry units. In order to prevent the formation of cracks during drying information's about the moisture migration rate variability as well as the material strength variability through drying are necessary. The main goal of this paper was to find a solution how to prevent the crack formation at the beginning (during the first hour) of the drying for the drying sensitive illite raw material. The first step was to record a series of isothermal Deff - MR curves at different drying air temperatures and constant drying air velocity and humidity. As it was already reported all moisture transport mechanisms during isothermal drying are visible on those curves. Characteristic spots registered on these curves were then transposed on the experimentally registered figure material strength us moisture content. It was found that the material strength for the cracked masonry units at the beginning of drying was around 0.09 MPa and that the time of cracking was near the characteristic spot B. Registered material strength and the crack time position (spot B) has additionally confirmed that the drying sensitivity of the raw material are obviously related with the present clay mineral constituents structure and the initial moisture content of the green heavy clay units. Using the Deff values registered for each experiment in the spot B we were able to calculate the maximal moisture transport rate and consequently the proper drying air parameters which are safe and which will not initialize the formation of the cracks at the beginning of the drying.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Modern Technologies in Industrial Engineering Vii (Modtech2019)",
title = "Method for avoiding cracks during drying of masonry units made of illite raw material",
volume = "591",
doi = "10.1088/1757-899X/591/1/012101"
}

Vasić, M.,& Radojević, Z.. (2019). Method for avoiding cracks during drying of masonry units made of illite raw material. in Modern Technologies in Industrial Engineering Vii (Modtech2019)
IOP Publishing Ltd, Bristol., 591.
https://doi.org/10.1088/1757-899X/591/1/012101

Vasić M, Radojević Z. Method for avoiding cracks during drying of masonry units made of illite raw material. in Modern Technologies in Industrial Engineering Vii (Modtech2019). 2019;591.
doi:10.1088/1757-899X/591/1/012101 .

Vasić, Miloš, Radojević, Zagorka, "Method for avoiding cracks during drying of masonry units made of illite raw material" in Modern Technologies in Industrial Engineering Vii (Modtech2019), 591 (2019),
https://doi.org/10.1088/1757-899X/591/1/012101 . .

TY  - JOUR
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/336
AB  - The description of the moisture transfer in porous media during drying was the subject of many scientific studies. The unique drying theory was developed five years ago and has recently won a general recognition in the scientific community. This paper is providing the update of the recently reported method for setting up the optimal drying parameters inside the heavy clay dryer. The main goal of this paper was to find a way how to reduce the number of experiments without affecting the quality of the previously proposed calculation method. The critical drying rate, as well as the drying behavior can be easily registered inside the laboratory recirculation dryer for any heavy clay product. These data provides a clear perception of how far the real drying curve, used in industrial dryer, is away from the shortest possible one. The algorithm of the updated procedure was based on the Box-Wilkinson's orthogonal multi - factorial experimental design. The updated model outputs were represented as the governing equations which were used to predict the time intervals between any two chosen characteristic points, specified in the unique drying theory, as a function of the drying air parameters. These equations were valid for any value of the drying air parameters taken from the previously established limiting boundary range. The updated procedure was compared with the original one for two predefined drying air parameters sets. Regardless to the fact that in the first case the results were not experimentally obtained they were similar to those which were in the second case experimentally identified. This was additional confirmation that the same quality degree has been maintained in both procedures, despite the fact that the total number of experiments was lower in the upgraded procedure than in the original one.
PB  - Serban Solacolu Foundation, Bucurest
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Update of the procedure used for heavy clay dryer optimization
EP  - 441
IS  - 4
SP  - 436
VL  - 48
UR  - https://hdl.handle.net/21.15107/rcub_rims_336
ER  - 

@article{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2018",
abstract = "The description of the moisture transfer in porous media during drying was the subject of many scientific studies. The unique drying theory was developed five years ago and has recently won a general recognition in the scientific community. This paper is providing the update of the recently reported method for setting up the optimal drying parameters inside the heavy clay dryer. The main goal of this paper was to find a way how to reduce the number of experiments without affecting the quality of the previously proposed calculation method. The critical drying rate, as well as the drying behavior can be easily registered inside the laboratory recirculation dryer for any heavy clay product. These data provides a clear perception of how far the real drying curve, used in industrial dryer, is away from the shortest possible one. The algorithm of the updated procedure was based on the Box-Wilkinson's orthogonal multi - factorial experimental design. The updated model outputs were represented as the governing equations which were used to predict the time intervals between any two chosen characteristic points, specified in the unique drying theory, as a function of the drying air parameters. These equations were valid for any value of the drying air parameters taken from the previously established limiting boundary range. The updated procedure was compared with the original one for two predefined drying air parameters sets. Regardless to the fact that in the first case the results were not experimentally obtained they were similar to those which were in the second case experimentally identified. This was additional confirmation that the same quality degree has been maintained in both procedures, despite the fact that the total number of experiments was lower in the upgraded procedure than in the original one.",
publisher = "Serban Solacolu Foundation, Bucurest",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Update of the procedure used for heavy clay dryer optimization",
pages = "441-436",
number = "4",
volume = "48",
url = "https://hdl.handle.net/21.15107/rcub_rims_336"
}

Vasić, M.,& Radojević, Z.. (2018). Update of the procedure used for heavy clay dryer optimization. in Revista Romana de Materiale/ Romanian Journal of Materials
Serban Solacolu Foundation, Bucurest., 48(4), 436-441.
https://hdl.handle.net/21.15107/rcub_rims_336

Vasić M, Radojević Z. Update of the procedure used for heavy clay dryer optimization. in Revista Romana de Materiale/ Romanian Journal of Materials. 2018;48(4):436-441.
https://hdl.handle.net/21.15107/rcub_rims_336 .

Vasić, Miloš, Radojević, Zagorka, "Update of the procedure used for heavy clay dryer optimization" in Revista Romana de Materiale/ Romanian Journal of Materials, 48, no. 4 (2018):436-441,
https://hdl.handle.net/21.15107/rcub_rims_336 .

TY  - JOUR
AU  - Vasić, Miloš
AU  - Rekecki, Robert
AU  - Radojević, Zagorka
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/327
AB  - Over the past three decades, traditional ceramic facilities, such as chamber and tunnel dryers, are improved. Better thermotechnical equipment, operational strategies, and reliable scale-up methodologies have lead to higher quality of the dried clay roofing tiles. Although there has been a progress, up to this study, there is no universally or even widely applicable criterion, which could be used to precisely define the change of drying air parameters (humidity, temperature, and velocity) during the drying process. The objective of this study was to specify the variable air parameters that should be used during the drying process to approach as much as possible to the theoretically defined optimal drying process.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Drying Technology
T1  - Procedure for setting up the drying regime that is consistent with the nature and properties of the clay raw material
EP  - 282
IS  - 3
SP  - 267
VL  - 36
DO  - 10.1080/07373937.2017.1324879
ER  - 

@article{
author = "Vasić, Miloš and Rekecki, Robert and Radojević, Zagorka",
year = "2018",
abstract = "Over the past three decades, traditional ceramic facilities, such as chamber and tunnel dryers, are improved. Better thermotechnical equipment, operational strategies, and reliable scale-up methodologies have lead to higher quality of the dried clay roofing tiles. Although there has been a progress, up to this study, there is no universally or even widely applicable criterion, which could be used to precisely define the change of drying air parameters (humidity, temperature, and velocity) during the drying process. The objective of this study was to specify the variable air parameters that should be used during the drying process to approach as much as possible to the theoretically defined optimal drying process.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Drying Technology",
title = "Procedure for setting up the drying regime that is consistent with the nature and properties of the clay raw material",
pages = "282-267",
number = "3",
volume = "36",
doi = "10.1080/07373937.2017.1324879"
}

Vasić, M., Rekecki, R.,& Radojević, Z.. (2018). Procedure for setting up the drying regime that is consistent with the nature and properties of the clay raw material. in Drying Technology
Taylor & Francis Inc, Philadelphia., 36(3), 267-282.
https://doi.org/10.1080/07373937.2017.1324879

Vasić M, Rekecki R, Radojević Z. Procedure for setting up the drying regime that is consistent with the nature and properties of the clay raw material. in Drying Technology. 2018;36(3):267-282.
doi:10.1080/07373937.2017.1324879 .

Vasić, Miloš, Rekecki, Robert, Radojević, Zagorka, "Procedure for setting up the drying regime that is consistent with the nature and properties of the clay raw material" in Drying Technology, 36, no. 3 (2018):267-282,
https://doi.org/10.1080/07373937.2017.1324879 . .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/326
AB  - In our previous studies we have presented the calculation method along with the procedure for setting up the non isothermal drying regime. Even though this method is harmonized, with the theory of moisture migration during drying and can be used to predict the optimal industrial drying regime and proper drying air parameters, up till now it was not compared with other models. The main goal of this paper, was to compare and evaluate our model with the one reported by the German group of authors in 2008. The first task was to create criteria for model evaluation. Five parameters were chosen: non-existence of cracks, total drying time, twist coefficient, chamber coefficient and flexural strength. The second task was to create a software tool, for modeling the first and second drying section of green clay masonry element, using the instructions provided within the published articles. The third task was to apply German and our procedure on the same clay raw material. Results have shown the absence of cracks on dried and fired samples. In the case of German method total drying time, as well as twist and camber coefficients were higher while the physico - mechanical properties were lower. Presented results have additionally validated that our dying model can be used for the accurate prediction of industrial drying kinetics and a reliable estimation of moisture transport during drying.
PB  - IOP Publishing Ltd, Bristol
C3  - Modtech International Conference - Modern Technologies in Industrial Engineering VI (Modtech 2018)
T1  - Comparison and evaluation of recently reported methods for optimization of industrial drying regimes
VL  - 400
DO  - 10.1088/1757-899X/400/6/062030
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2018",
abstract = "In our previous studies we have presented the calculation method along with the procedure for setting up the non isothermal drying regime. Even though this method is harmonized, with the theory of moisture migration during drying and can be used to predict the optimal industrial drying regime and proper drying air parameters, up till now it was not compared with other models. The main goal of this paper, was to compare and evaluate our model with the one reported by the German group of authors in 2008. The first task was to create criteria for model evaluation. Five parameters were chosen: non-existence of cracks, total drying time, twist coefficient, chamber coefficient and flexural strength. The second task was to create a software tool, for modeling the first and second drying section of green clay masonry element, using the instructions provided within the published articles. The third task was to apply German and our procedure on the same clay raw material. Results have shown the absence of cracks on dried and fired samples. In the case of German method total drying time, as well as twist and camber coefficients were higher while the physico - mechanical properties were lower. Presented results have additionally validated that our dying model can be used for the accurate prediction of industrial drying kinetics and a reliable estimation of moisture transport during drying.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Modtech International Conference - Modern Technologies in Industrial Engineering VI (Modtech 2018)",
title = "Comparison and evaluation of recently reported methods for optimization of industrial drying regimes",
volume = "400",
doi = "10.1088/1757-899X/400/6/062030"
}

Vasić, M.,& Radojević, Z.. (2018). Comparison and evaluation of recently reported methods for optimization of industrial drying regimes. in Modtech International Conference - Modern Technologies in Industrial Engineering VI (Modtech 2018)
IOP Publishing Ltd, Bristol., 400.
https://doi.org/10.1088/1757-899X/400/6/062030

Vasić M, Radojević Z. Comparison and evaluation of recently reported methods for optimization of industrial drying regimes. in Modtech International Conference - Modern Technologies in Industrial Engineering VI (Modtech 2018). 2018;400.
doi:10.1088/1757-899X/400/6/062030 .

Vasić, Miloš, Radojević, Zagorka, "Comparison and evaluation of recently reported methods for optimization of industrial drying regimes" in Modtech International Conference - Modern Technologies in Industrial Engineering VI (Modtech 2018), 400 (2018),
https://doi.org/10.1088/1757-899X/400/6/062030 . .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/321
AB  - One of the main disadvantages of the recently reported method, for setting up the drying regime based on the theory of moisture migration during drying, lies in a fact that it is based on a large number of isothermal experiments. In addition each isothermal experiment requires the use of different drying air parameters. The main goal of this paper was to find a way how to reduce the number of isothermal experiments without affecting the quality of the previously proposed calculation method. The first task was to define the lower and upper inputs as well as the output of the "black box" which will be used in the Box-Wilkinson's orthogonal multi-factorial experimental design. Three inputs (drying air temperature, humidity and velocity) were used within the experimental design. The output parameter of the model represents the time interval between any two chosen characteristic points presented on the Deff -t. The second task was to calculate the output parameter for each planed experiments. The final output of the model is the equation which can predict the time interval between any two chosen characteristic points as a function of the drying air parameters. This equation is valid for any value of the drying air parameters which are within the defined area designated with lower and upper limiting values.
PB  - IOP Publishing Ltd, Bristol
C3  - Modtech International Conference - Modern Technologies in Industrial Engineering V
T1  - Defining a procedure for predicting the duration of the approximately isothermal segments within the proposed drying regime as a function of the drying air parameters
VL  - 227
DO  - 10.1088/1757-899X/227/1/012134
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2017",
abstract = "One of the main disadvantages of the recently reported method, for setting up the drying regime based on the theory of moisture migration during drying, lies in a fact that it is based on a large number of isothermal experiments. In addition each isothermal experiment requires the use of different drying air parameters. The main goal of this paper was to find a way how to reduce the number of isothermal experiments without affecting the quality of the previously proposed calculation method. The first task was to define the lower and upper inputs as well as the output of the "black box" which will be used in the Box-Wilkinson's orthogonal multi-factorial experimental design. Three inputs (drying air temperature, humidity and velocity) were used within the experimental design. The output parameter of the model represents the time interval between any two chosen characteristic points presented on the Deff -t. The second task was to calculate the output parameter for each planed experiments. The final output of the model is the equation which can predict the time interval between any two chosen characteristic points as a function of the drying air parameters. This equation is valid for any value of the drying air parameters which are within the defined area designated with lower and upper limiting values.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Modtech International Conference - Modern Technologies in Industrial Engineering V",
title = "Defining a procedure for predicting the duration of the approximately isothermal segments within the proposed drying regime as a function of the drying air parameters",
volume = "227",
doi = "10.1088/1757-899X/227/1/012134"
}

Vasić, M.,& Radojević, Z.. (2017). Defining a procedure for predicting the duration of the approximately isothermal segments within the proposed drying regime as a function of the drying air parameters. in Modtech International Conference - Modern Technologies in Industrial Engineering V
IOP Publishing Ltd, Bristol., 227.
https://doi.org/10.1088/1757-899X/227/1/012134

Vasić M, Radojević Z. Defining a procedure for predicting the duration of the approximately isothermal segments within the proposed drying regime as a function of the drying air parameters. in Modtech International Conference - Modern Technologies in Industrial Engineering V. 2017;227.
doi:10.1088/1757-899X/227/1/012134 .

Vasić, Miloš, Radojević, Zagorka, "Defining a procedure for predicting the duration of the approximately isothermal segments within the proposed drying regime as a function of the drying air parameters" in Modtech International Conference - Modern Technologies in Industrial Engineering V, 227 (2017),
https://doi.org/10.1088/1757-899X/227/1/012134 . .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2016
UR  - http://rims.institutims.rs/handle/123456789/289
AB  - Drying is energy intensive process which has important effect on the quality of the clay tiles that are dried commercially. Chamber and tunnel dryers are constantly improving. Better technical equipment and operational strategies have lead to higher quality of the dried clay products. The moisture migration during isothermal drying process can be visually traced on the curve that represents the relationship between variable effective moisture diffusivity (MR) with time (t). Proposed non isothermal drying regimes were consisted from several isothermal segments. For the first time, the choice of isothermal segments specification and its duration was not specified by experience or by trial-and-error method. It was detected from the isothermal curves Deff - MR in accordance with the theory of moisture migration during drying. Proposed drying regimes were tested. Clay roofing tiles were dried without cracks. Dried clay roofing tiles has satisfied all requirements defined in EN 1304 norm related to the shape regularity and mechanical properties.
PB  - IOP Publishing Ltd, Bristol
C3  - Modtech International Conference - Modern Technologies in Industrial Engineering IV, Pts 1-7
T1  - Setting up the drying regimes based on the theory of moisture migration during drying
VL  - 145
DO  - 10.1088/1757-899X/145/3/032012
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2016",
abstract = "Drying is energy intensive process which has important effect on the quality of the clay tiles that are dried commercially. Chamber and tunnel dryers are constantly improving. Better technical equipment and operational strategies have lead to higher quality of the dried clay products. The moisture migration during isothermal drying process can be visually traced on the curve that represents the relationship between variable effective moisture diffusivity (MR) with time (t). Proposed non isothermal drying regimes were consisted from several isothermal segments. For the first time, the choice of isothermal segments specification and its duration was not specified by experience or by trial-and-error method. It was detected from the isothermal curves Deff - MR in accordance with the theory of moisture migration during drying. Proposed drying regimes were tested. Clay roofing tiles were dried without cracks. Dried clay roofing tiles has satisfied all requirements defined in EN 1304 norm related to the shape regularity and mechanical properties.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Modtech International Conference - Modern Technologies in Industrial Engineering IV, Pts 1-7",
title = "Setting up the drying regimes based on the theory of moisture migration during drying",
volume = "145",
doi = "10.1088/1757-899X/145/3/032012"
}

Vasić, M.,& Radojević, Z.. (2016). Setting up the drying regimes based on the theory of moisture migration during drying. in Modtech International Conference - Modern Technologies in Industrial Engineering IV, Pts 1-7
IOP Publishing Ltd, Bristol., 145.
https://doi.org/10.1088/1757-899X/145/3/032012

Vasić M, Radojević Z. Setting up the drying regimes based on the theory of moisture migration during drying. in Modtech International Conference - Modern Technologies in Industrial Engineering IV, Pts 1-7. 2016;145.
doi:10.1088/1757-899X/145/3/032012 .

Vasić, Miloš, Radojević, Zagorka, "Setting up the drying regimes based on the theory of moisture migration during drying" in Modtech International Conference - Modern Technologies in Industrial Engineering IV, Pts 1-7, 145 (2016),
https://doi.org/10.1088/1757-899X/145/3/032012 . .

TY  - JOUR
AU  - Radojević, Zagorka
AU  - Terzić, Anja
AU  - Vasić, Miloš
AU  - Arsenović, Milica
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/260
AB  - This research was conducted to identify the nature and the cause of non-typical defects which appeared on the visible surfaces of ceramic and roof tiles. Microstructural analysis was conducted via optical microscope and scanning electron microscope coupled with energy dispersive spectrometer. Ceramic tiles contained black spots and dark brown clusters with yellow halos. Black spots originated from carbon contained in starting glaze raw materials. EDS analysis of clusters of dark-brown color in the pores showed the presence of Fe, which is found to affect the quality of the visible tile surface. Non-homogeneities on the roof tiles surfaces appeared in the form of stains and manifested after immersions in water or aspersing water on the tile surface. The cause of inhomogeneities was a local phenomenon due to the porous structure of micro cracks caused by coarse metallic grains that are imported with the raw materials.
PB  - ModTech Publishing House
T2  - International Journal of Modern Manufacturing Technologies
T1  - Non-typical defects on surfaces of ceramic and roof tiles: Nature and the causes
EP  - 66
IS  - 1
SP  - 61
VL  - 7
UR  - https://hdl.handle.net/21.15107/rcub_rims_260
ER  - 

@article{
author = "Radojević, Zagorka and Terzić, Anja and Vasić, Miloš and Arsenović, Milica",
year = "2015",
abstract = "This research was conducted to identify the nature and the cause of non-typical defects which appeared on the visible surfaces of ceramic and roof tiles. Microstructural analysis was conducted via optical microscope and scanning electron microscope coupled with energy dispersive spectrometer. Ceramic tiles contained black spots and dark brown clusters with yellow halos. Black spots originated from carbon contained in starting glaze raw materials. EDS analysis of clusters of dark-brown color in the pores showed the presence of Fe, which is found to affect the quality of the visible tile surface. Non-homogeneities on the roof tiles surfaces appeared in the form of stains and manifested after immersions in water or aspersing water on the tile surface. The cause of inhomogeneities was a local phenomenon due to the porous structure of micro cracks caused by coarse metallic grains that are imported with the raw materials.",
publisher = "ModTech Publishing House",
journal = "International Journal of Modern Manufacturing Technologies",
title = "Non-typical defects on surfaces of ceramic and roof tiles: Nature and the causes",
pages = "66-61",
number = "1",
volume = "7",
url = "https://hdl.handle.net/21.15107/rcub_rims_260"
}

Radojević, Z., Terzić, A., Vasić, M.,& Arsenović, M.. (2015). Non-typical defects on surfaces of ceramic and roof tiles: Nature and the causes. in International Journal of Modern Manufacturing Technologies
ModTech Publishing House., 7(1), 61-66.
https://hdl.handle.net/21.15107/rcub_rims_260

Radojević Z, Terzić A, Vasić M, Arsenović M. Non-typical defects on surfaces of ceramic and roof tiles: Nature and the causes. in International Journal of Modern Manufacturing Technologies. 2015;7(1):61-66.
https://hdl.handle.net/21.15107/rcub_rims_260 .

Radojević, Zagorka, Terzić, Anja, Vasić, Miloš, Arsenović, Milica, "Non-typical defects on surfaces of ceramic and roof tiles: Nature and the causes" in International Journal of Modern Manufacturing Technologies, 7, no. 1 (2015):61-66,
https://hdl.handle.net/21.15107/rcub_rims_260 .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/278
AB  - In our previous studies we have developed a model for determination of the variable effective diffusivity and identification of the exact transition points between possible drying mechanisms. The next goal was to develop a drying regime which could in advance characterize the real non isothermal process of drying clay tiles. In order to do this four isothermal experiments were recorded. Temperature and humidity were maintained at 350C / 75%; 450C / 70%; 450C / 60% and 500C / 60%; respectively in each experiment. All experimentally collected data were analyzed and the exact transition points between possible drying mechanisms were detected. Characteristic drying period (time) for each isothermal drying mechanism was also detected. The real, non-isothermal drying process was approximated by 5 segments. In each of these segments approximately isothermal drying condition were maintained. Temperature and humidity of the drying air, in the first four segments, was maintained on the same level as in recorded isothermal experiments while in the fifth segment, it were maintained at 700C / 40%. The duration of the first four segments were calculated from the diagrams Deff - t respectively for each experiment. The clay tile in experiment five was dried without cracking using the proposed non isothermal drying regime.
PB  - IOP Publishing Ltd, Bristol
C3  - Modern Technologies in Industrial Engineering (Modtech2015)
T1  - Non isothermal drying process optimisation - Drying of clay tiles
VL  - 95
DO  - 10.1088/1757-899X/95/1/012025
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2015",
abstract = "In our previous studies we have developed a model for determination of the variable effective diffusivity and identification of the exact transition points between possible drying mechanisms. The next goal was to develop a drying regime which could in advance characterize the real non isothermal process of drying clay tiles. In order to do this four isothermal experiments were recorded. Temperature and humidity were maintained at 350C / 75%; 450C / 70%; 450C / 60% and 500C / 60%; respectively in each experiment. All experimentally collected data were analyzed and the exact transition points between possible drying mechanisms were detected. Characteristic drying period (time) for each isothermal drying mechanism was also detected. The real, non-isothermal drying process was approximated by 5 segments. In each of these segments approximately isothermal drying condition were maintained. Temperature and humidity of the drying air, in the first four segments, was maintained on the same level as in recorded isothermal experiments while in the fifth segment, it were maintained at 700C / 40%. The duration of the first four segments were calculated from the diagrams Deff - t respectively for each experiment. The clay tile in experiment five was dried without cracking using the proposed non isothermal drying regime.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Modern Technologies in Industrial Engineering (Modtech2015)",
title = "Non isothermal drying process optimisation - Drying of clay tiles",
volume = "95",
doi = "10.1088/1757-899X/95/1/012025"
}

Vasić, M.,& Radojević, Z.. (2015). Non isothermal drying process optimisation - Drying of clay tiles. in Modern Technologies in Industrial Engineering (Modtech2015)
IOP Publishing Ltd, Bristol., 95.
https://doi.org/10.1088/1757-899X/95/1/012025

Vasić M, Radojević Z. Non isothermal drying process optimisation - Drying of clay tiles. in Modern Technologies in Industrial Engineering (Modtech2015). 2015;95.
doi:10.1088/1757-899X/95/1/012025 .

Vasić, Miloš, Radojević, Zagorka, "Non isothermal drying process optimisation - Drying of clay tiles" in Modern Technologies in Industrial Engineering (Modtech2015), 95 (2015),
https://doi.org/10.1088/1757-899X/95/1/012025 . .

TY  - JOUR
AU  - Vasić, Miloš
AU  - Grbavčić, Željko
AU  - Radojević, Zagorka
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/252
AB  - The description of the drying process was reduced to the establishment of a series of theoretical and empirical drying models. The complex processes of simultaneous moisture and heat transfer, which are often nonstationary, and the distinct nature and properties of the material to be dried further complicate the description of the drying process. Three theories-diffusion theory, capillary flow theory, and evaporation-condensation theory-have won general recognition for the explanation of moisture transfer in porous media. The mechanisms of moisture movement during drying in the constant and especially in the falling drying period are rather complex and, hitherto, there have been no generally accepted explanations that could identify the exact transition between possible drying mechanisms, such as liquid movement due to capillary forces, liquid diffusion due to concentration gradients, liquid and vapor flow due to differences in total pressure, vapor diffusion due to difference in vapor concentration, vapor diffusion due to partial vapor pressure gradients, Knudsen diffusion, thermodiffusion, and the evaporation-condensation mechanism. The goal of this study was to find a way to better understand the different drying mechanisms, to identify the exact transition between them, and to estimate the time-dependent effective diffusivity. The results presented in this article confirmed that the effective diffusivity represents an overall mass transport property of moisture that includes all possible moisture transport mechanisms that are simultaneously controlling the moisture migration process in a material during drying. The experimental investigations were performed on clay tiles in a laboratory recirculation dryer, for which the drying parameters (humidity, temperature, and velocity) could be programmed, controlled, and monitored during drying.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Drying Technology
T1  - Analysis of Moisture Transfer During the Drying of Clay Tiles with Particular Reference to an Estimation of the Time-Dependent Effective Diffusivity
EP  - 840
IS  - 7
SP  - 829
VL  - 32
DO  - 10.1080/07373937.2013.870194
ER  - 

@article{
author = "Vasić, Miloš and Grbavčić, Željko and Radojević, Zagorka",
year = "2014",
abstract = "The description of the drying process was reduced to the establishment of a series of theoretical and empirical drying models. The complex processes of simultaneous moisture and heat transfer, which are often nonstationary, and the distinct nature and properties of the material to be dried further complicate the description of the drying process. Three theories-diffusion theory, capillary flow theory, and evaporation-condensation theory-have won general recognition for the explanation of moisture transfer in porous media. The mechanisms of moisture movement during drying in the constant and especially in the falling drying period are rather complex and, hitherto, there have been no generally accepted explanations that could identify the exact transition between possible drying mechanisms, such as liquid movement due to capillary forces, liquid diffusion due to concentration gradients, liquid and vapor flow due to differences in total pressure, vapor diffusion due to difference in vapor concentration, vapor diffusion due to partial vapor pressure gradients, Knudsen diffusion, thermodiffusion, and the evaporation-condensation mechanism. The goal of this study was to find a way to better understand the different drying mechanisms, to identify the exact transition between them, and to estimate the time-dependent effective diffusivity. The results presented in this article confirmed that the effective diffusivity represents an overall mass transport property of moisture that includes all possible moisture transport mechanisms that are simultaneously controlling the moisture migration process in a material during drying. The experimental investigations were performed on clay tiles in a laboratory recirculation dryer, for which the drying parameters (humidity, temperature, and velocity) could be programmed, controlled, and monitored during drying.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Drying Technology",
title = "Analysis of Moisture Transfer During the Drying of Clay Tiles with Particular Reference to an Estimation of the Time-Dependent Effective Diffusivity",
pages = "840-829",
number = "7",
volume = "32",
doi = "10.1080/07373937.2013.870194"
}

Vasić, M., Grbavčić, Ž.,& Radojević, Z.. (2014). Analysis of Moisture Transfer During the Drying of Clay Tiles with Particular Reference to an Estimation of the Time-Dependent Effective Diffusivity. in Drying Technology
Taylor & Francis Inc, Philadelphia., 32(7), 829-840.
https://doi.org/10.1080/07373937.2013.870194

Vasić M, Grbavčić Ž, Radojević Z. Analysis of Moisture Transfer During the Drying of Clay Tiles with Particular Reference to an Estimation of the Time-Dependent Effective Diffusivity. in Drying Technology. 2014;32(7):829-840.
doi:10.1080/07373937.2013.870194 .

Vasić, Miloš, Grbavčić, Željko, Radojević, Zagorka, "Analysis of Moisture Transfer During the Drying of Clay Tiles with Particular Reference to an Estimation of the Time-Dependent Effective Diffusivity" in Drying Technology, 32, no. 7 (2014):829-840,
https://doi.org/10.1080/07373937.2013.870194 . .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/251
AB  - In order to describe the internal moisture rate and to take all different mechanisms of moisture movement into account, it is suitable to use effective diffusivity as a measure of moisture rate, irrespectively of the mechanisms really involved. This means that all different mechanisms and driving forces for internal moisture transport are lumped together and introduced into effective moisture diffusivity. Hence, diffusion equations are retained and reused with the effective diffusivity coefficient as a measuring parameter of internal moisture ratio. In our previous studies we have presented the calculation method which assumed constant diffusivity. The next goal was to estimate effective diffusivity at various moisture contents, in a real case of non-linear drying curves, and to predict drying kinetic. In our last study we have developed a model for determination of the variable effective diffusivity and identification of the exact transition points between possible drying mechanisms. In this paper we have tried to develop more accurate tool for determination of time dependent effective moisture diffusivity. An analytical model and computing procedure were developed to evaluate mass transfer properties and describe drying kinetic of clay tiles having less clay fraction. The proposed procedure was validated with experimental drying data. Presented results have demonstrated that the proposed dying model can be applied for the accurate description of experimental drying kinetics and a reliable estimation of effective diffusivity.
PB  - Trans Tech Publications Ltd
C3  - Advanced Materials Research
T1  - Drying kinetic simulation of clay tiles made from the raw material having less clay fraction
EP  - 8
SP  - 3
VL  - 1036
DO  - 10.4028/www.scientific.net/AMR.1036.3
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2014",
abstract = "In order to describe the internal moisture rate and to take all different mechanisms of moisture movement into account, it is suitable to use effective diffusivity as a measure of moisture rate, irrespectively of the mechanisms really involved. This means that all different mechanisms and driving forces for internal moisture transport are lumped together and introduced into effective moisture diffusivity. Hence, diffusion equations are retained and reused with the effective diffusivity coefficient as a measuring parameter of internal moisture ratio. In our previous studies we have presented the calculation method which assumed constant diffusivity. The next goal was to estimate effective diffusivity at various moisture contents, in a real case of non-linear drying curves, and to predict drying kinetic. In our last study we have developed a model for determination of the variable effective diffusivity and identification of the exact transition points between possible drying mechanisms. In this paper we have tried to develop more accurate tool for determination of time dependent effective moisture diffusivity. An analytical model and computing procedure were developed to evaluate mass transfer properties and describe drying kinetic of clay tiles having less clay fraction. The proposed procedure was validated with experimental drying data. Presented results have demonstrated that the proposed dying model can be applied for the accurate description of experimental drying kinetics and a reliable estimation of effective diffusivity.",
publisher = "Trans Tech Publications Ltd",
journal = "Advanced Materials Research",
title = "Drying kinetic simulation of clay tiles made from the raw material having less clay fraction",
pages = "8-3",
volume = "1036",
doi = "10.4028/www.scientific.net/AMR.1036.3"
}

Vasić, M.,& Radojević, Z.. (2014). Drying kinetic simulation of clay tiles made from the raw material having less clay fraction. in Advanced Materials Research
Trans Tech Publications Ltd., 1036, 3-8.
https://doi.org/10.4028/www.scientific.net/AMR.1036.3

Vasić M, Radojević Z. Drying kinetic simulation of clay tiles made from the raw material having less clay fraction. in Advanced Materials Research. 2014;1036:3-8.
doi:10.4028/www.scientific.net/AMR.1036.3 .

Vasić, Miloš, Radojević, Zagorka, "Drying kinetic simulation of clay tiles made from the raw material having less clay fraction" in Advanced Materials Research, 1036 (2014):3-8,
https://doi.org/10.4028/www.scientific.net/AMR.1036.3 . .

TY  - JOUR
AU  - Vasić, Miloš
AU  - Grbavčić, Željko
AU  - Radojević, Zagorka
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/239
AB  - Drying plays an important role in the production of clay tiles. In the present article, drying process is analyzed taking experimental data for several masonry clays obtained from different clay tile manufacturers and published data for different clay slabs. Calculation methods and computer programs designed for the calculation of the effective diffusion coefficient are developed. The first calculation method represents the analytical solution of the Crank equation, while the second one represents the analytical solution of the Efremov equation with boundary conditions in the form of the flux. Unlike other materials, clay tiles exhibit shrinkage during the drying process. For this reason, a shrinkage correction is included in both calculation methods. Four models (Al, A2, B1 and B2) for predicting the drying behavior are obtained as the result of the calculation cited programs. It is shown that the calculated effective diffusion coefficient determined by the designed computer programs, using experimentally obtained and selected published data sets have similar values to those of the same coefficient reported in the literature. Based on the mathematically determined prognostic values of the effective diffusion coefficient, it was concluded that there is more than 90% agreement between the experimentally recorded and the calculated drying curves.
PB  - Elsevier Science Sa, Lausanne
T2  - Chemical Engineering and Processing-Process Intensification
T1  - Determination of the moisture diffusivity coefficient and mathematical modeling of drying
EP  - 44
SP  - 33
VL  - 76
DO  - 10.1016/j.cep.2013.12.003
ER  - 

@article{
author = "Vasić, Miloš and Grbavčić, Željko and Radojević, Zagorka",
year = "2014",
abstract = "Drying plays an important role in the production of clay tiles. In the present article, drying process is analyzed taking experimental data for several masonry clays obtained from different clay tile manufacturers and published data for different clay slabs. Calculation methods and computer programs designed for the calculation of the effective diffusion coefficient are developed. The first calculation method represents the analytical solution of the Crank equation, while the second one represents the analytical solution of the Efremov equation with boundary conditions in the form of the flux. Unlike other materials, clay tiles exhibit shrinkage during the drying process. For this reason, a shrinkage correction is included in both calculation methods. Four models (Al, A2, B1 and B2) for predicting the drying behavior are obtained as the result of the calculation cited programs. It is shown that the calculated effective diffusion coefficient determined by the designed computer programs, using experimentally obtained and selected published data sets have similar values to those of the same coefficient reported in the literature. Based on the mathematically determined prognostic values of the effective diffusion coefficient, it was concluded that there is more than 90% agreement between the experimentally recorded and the calculated drying curves.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Chemical Engineering and Processing-Process Intensification",
title = "Determination of the moisture diffusivity coefficient and mathematical modeling of drying",
pages = "44-33",
volume = "76",
doi = "10.1016/j.cep.2013.12.003"
}

Vasić, M., Grbavčić, Ž.,& Radojević, Z.. (2014). Determination of the moisture diffusivity coefficient and mathematical modeling of drying. in Chemical Engineering and Processing-Process Intensification
Elsevier Science Sa, Lausanne., 76, 33-44.
https://doi.org/10.1016/j.cep.2013.12.003

Vasić M, Grbavčić Ž, Radojević Z. Determination of the moisture diffusivity coefficient and mathematical modeling of drying. in Chemical Engineering and Processing-Process Intensification. 2014;76:33-44.
doi:10.1016/j.cep.2013.12.003 .

Vasić, Miloš, Grbavčić, Željko, Radojević, Zagorka, "Determination of the moisture diffusivity coefficient and mathematical modeling of drying" in Chemical Engineering and Processing-Process Intensification, 76 (2014):33-44,
https://doi.org/10.1016/j.cep.2013.12.003 . .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/228
AB  - This paper represents the upgrade of our previous study in which we have presented a model for simulation of the drying kinetic and estimation of the effective moisture diffusivity of clay tiles using a constant diffusivity model. The main objective of this study is to determine the time dependent effective moisture diffusivity of shrinkable clay tiles. Experimental investigations were carried out, on clay tiles, in a laboratory recirculation dryer in which drying parameters (humidity, temperature, and velocity) could be programmed, controlled and monitored during drying. Results presented in this study have shown that the proposed drying model describes and correlates accurately drying kinetics and gives a reliably estimation of the time - dependent effective moisture diffusivity.
PB  - Trans Tech Publications Ltd, Stafa-Zurich
C3  - Modern Technologies in Industrial Engineering
T1  - Drying simulation of shrinkable clay tiles using variable diffusivity model
EP  - 510
SP  - 506
VL  - 837
DO  - 10.4028/www.scientific.net/AMR.837.506
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2014",
abstract = "This paper represents the upgrade of our previous study in which we have presented a model for simulation of the drying kinetic and estimation of the effective moisture diffusivity of clay tiles using a constant diffusivity model. The main objective of this study is to determine the time dependent effective moisture diffusivity of shrinkable clay tiles. Experimental investigations were carried out, on clay tiles, in a laboratory recirculation dryer in which drying parameters (humidity, temperature, and velocity) could be programmed, controlled and monitored during drying. Results presented in this study have shown that the proposed drying model describes and correlates accurately drying kinetics and gives a reliably estimation of the time - dependent effective moisture diffusivity.",
publisher = "Trans Tech Publications Ltd, Stafa-Zurich",
journal = "Modern Technologies in Industrial Engineering",
title = "Drying simulation of shrinkable clay tiles using variable diffusivity model",
pages = "510-506",
volume = "837",
doi = "10.4028/www.scientific.net/AMR.837.506"
}

Vasić, M.,& Radojević, Z.. (2014). Drying simulation of shrinkable clay tiles using variable diffusivity model. in Modern Technologies in Industrial Engineering
Trans Tech Publications Ltd, Stafa-Zurich., 837, 506-510.
https://doi.org/10.4028/www.scientific.net/AMR.837.506

Vasić M, Radojević Z. Drying simulation of shrinkable clay tiles using variable diffusivity model. in Modern Technologies in Industrial Engineering. 2014;837:506-510.
doi:10.4028/www.scientific.net/AMR.837.506 .

Vasić, Miloš, Radojević, Zagorka, "Drying simulation of shrinkable clay tiles using variable diffusivity model" in Modern Technologies in Industrial Engineering, 837 (2014):506-510,
https://doi.org/10.4028/www.scientific.net/AMR.837.506 . .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2013
UR  - http://rims.institutims.rs/handle/123456789/582
AB  - The aim of this study was to establish the model for predicting the moisture and velocity in the critical point during drying of green  masonry products. The raw material was first dried at a temperature of 60°C, and then after cooling to room temperature, was milled down using perforated rolls mill. Milled material was identified and subject to further classical preparation, which precedes the fom1ation on the vacuum presses. Thus prepared sample carried the name .. sample  A. The staning raw material was mechanically activated for 30 minutes. Thus prepared sample carried the name- sample B. Laboratory samples 120x50xl4 mm were formed in a laboratory extruder under a vacuum of 0.8 bar. These samples were used in further experimental work. Drying process was monitored and all process  parameters  such  as: temperature,  relative  humidity  of the  drying air, weight changes, linear shrinkage, temperature of the surface and in the centre of test samples were recorded continually. Two mathematical models,  based  on  multi  factorial  experimental  design technique, were set up . The first describes the moisture and the second one the velocity value of the samples B in the critical point as a function of temperature , relative humidity and the velocity of the drying medium.
C3  - Programme and book of abstracts, The Serbian Ceramic Society Conference “Advanced Ceramics and Application II”, Belgrade
T1  - Establishing the model for predicting the moisture and velocity in the critical point during drying of green masonry products
UR  - https://hdl.handle.net/21.15107/rcub_rims_582
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2013",
abstract = "The aim of this study was to establish the model for predicting the moisture and velocity in the critical point during drying of green  masonry products. The raw material was first dried at a temperature of 60°C, and then after cooling to room temperature, was milled down using perforated rolls mill. Milled material was identified and subject to further classical preparation, which precedes the fom1ation on the vacuum presses. Thus prepared sample carried the name .. sample  A. The staning raw material was mechanically activated for 30 minutes. Thus prepared sample carried the name- sample B. Laboratory samples 120x50xl4 mm were formed in a laboratory extruder under a vacuum of 0.8 bar. These samples were used in further experimental work. Drying process was monitored and all process  parameters  such  as: temperature,  relative  humidity  of the  drying air, weight changes, linear shrinkage, temperature of the surface and in the centre of test samples were recorded continually. Two mathematical models,  based  on  multi  factorial  experimental  design technique, were set up . The first describes the moisture and the second one the velocity value of the samples B in the critical point as a function of temperature , relative humidity and the velocity of the drying medium.",
journal = "Programme and book of abstracts, The Serbian Ceramic Society Conference “Advanced Ceramics and Application II”, Belgrade",
title = "Establishing the model for predicting the moisture and velocity in the critical point during drying of green masonry products",
url = "https://hdl.handle.net/21.15107/rcub_rims_582"
}

Vasić, M.,& Radojević, Z.. (2013). Establishing the model for predicting the moisture and velocity in the critical point during drying of green masonry products. in Programme and book of abstracts, The Serbian Ceramic Society Conference “Advanced Ceramics and Application II”, Belgrade.
https://hdl.handle.net/21.15107/rcub_rims_582

Vasić M, Radojević Z. Establishing the model for predicting the moisture and velocity in the critical point during drying of green masonry products. in Programme and book of abstracts, The Serbian Ceramic Society Conference “Advanced Ceramics and Application II”, Belgrade. 2013;.
https://hdl.handle.net/21.15107/rcub_rims_582 .

Vasić, Miloš, Radojević, Zagorka, "Establishing the model for predicting the moisture and velocity in the critical point during drying of green masonry products" in Programme and book of abstracts, The Serbian Ceramic Society Conference “Advanced Ceramics and Application II”, Belgrade (2013),
https://hdl.handle.net/21.15107/rcub_rims_582 .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2013
UR  - http://rims.institutims.rs/handle/123456789/198
AB  - Drying results, determined on samples made of masonry clay from the locality "Banatski Karlovac", are presented in this study. Experimental investigations were carried out in a laboratory recirculation dryer in which drying parameters (humidity, temperature, and velocity) could be programmed, controlled and monitored during drying process. Several mathematical models were used for drying process modelling. New semi-theoretical thin layer drying model, for heavy clay products, was developed and presented in this study. It represents a modification of Pages and logarithm's thin layer drying models. Results presented in this study have shown that new thin layer drying model describes and correlates the best experimentally determined drying process.
PB  - Trans Tech Publications Ltd, Stafa-Zurich
C3  - Innovative Manufacturing Engineering
T1  - Drying Process Modelling for Heavy Clay Products Using a New Thin Layer Drying Model
EP  - 327
SP  - 323
VL  - 371
DO  - 10.4028/www.scientific.net/AMM.371.323
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2013",
abstract = "Drying results, determined on samples made of masonry clay from the locality "Banatski Karlovac", are presented in this study. Experimental investigations were carried out in a laboratory recirculation dryer in which drying parameters (humidity, temperature, and velocity) could be programmed, controlled and monitored during drying process. Several mathematical models were used for drying process modelling. New semi-theoretical thin layer drying model, for heavy clay products, was developed and presented in this study. It represents a modification of Pages and logarithm's thin layer drying models. Results presented in this study have shown that new thin layer drying model describes and correlates the best experimentally determined drying process.",
publisher = "Trans Tech Publications Ltd, Stafa-Zurich",
journal = "Innovative Manufacturing Engineering",
title = "Drying Process Modelling for Heavy Clay Products Using a New Thin Layer Drying Model",
pages = "327-323",
volume = "371",
doi = "10.4028/www.scientific.net/AMM.371.323"
}

Vasić, M.,& Radojević, Z.. (2013). Drying Process Modelling for Heavy Clay Products Using a New Thin Layer Drying Model. in Innovative Manufacturing Engineering
Trans Tech Publications Ltd, Stafa-Zurich., 371, 323-327.
https://doi.org/10.4028/www.scientific.net/AMM.371.323

Vasić M, Radojević Z. Drying Process Modelling for Heavy Clay Products Using a New Thin Layer Drying Model. in Innovative Manufacturing Engineering. 2013;371:323-327.
doi:10.4028/www.scientific.net/AMM.371.323 .

Vasić, Miloš, Radojević, Zagorka, "Drying Process Modelling for Heavy Clay Products Using a New Thin Layer Drying Model" in Innovative Manufacturing Engineering, 371 (2013):323-327,
https://doi.org/10.4028/www.scientific.net/AMM.371.323 . .

TY  - JOUR
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
AU  - Grbavčić, Željko
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/181
AB  - Cilj ovog rada je da se na primeru dve opekarske gline sa različitih lokaliteta odredi efektivni koeficijenat difuzije na osnovu eksperimentalno snimljenih krivih sušenja. Razvijen je metod i napravljena su dva kompjuterska programa za određivanje ovog koeficijenta, koji se zasnivaju na matematičkom rešavanju Fikove, odnosno Krankove difuzione jednačine. Po prvi put uzeto je u razmatranje i skupljanje opekarskih proizvoda u toku sušenja a odgovarajuća korekcija je uneta u proračun. Rezultati pokazuju da su vrednosti efektivnog koeficijenta difuzije određeni kompjuterskim programima (sa korekcijom i bez korekcije na skupljanje opekarskih proizvoda) reda veličine koje su navedene u literaturi za druge vrste opekarskih glina. Na osnovu matematičkim putem prognoziranih vrednosti efektivnog koeficijenta difuzije konstatovano je, da bez obzira na polazni mineraloški sastav opekarske sirovine, postoji 90 % slaganja prognoziranih krivih sušenja sa eksperimentalno snimljenim krivima sušenja. Za slučaj kada je uvedena u proračune i korekcija na skupljanje opekarskih proizvoda ovo slaganje je još veće.
AB  - The aim of this study was to calculate the effective diffusion coefficient based on experimentally recorded drying curves for two masonry clays obtained from different localities. The calculation method and two computer programs based on the mathematical calculation of the Second Fick Law and the Cranck Diffusion Equation were developed. Masonry product shrinkage during drying was taken into consideration for the first time and the appropriate correction was entered into the calculation. The results presented in this paper show that the values of the effective diffusion coefficient determined by the designed computer programs (with and without the correction for shrinkage) have similar values to those available in the literature for the same coefficient for different clays. Based on the mathematically determined prognostic value of the effective diffusion coefficient, it was concluded that, whatever the initial mineralogical composition of the clay, there is 90 % agreement of the calculated prognostic drying curves with the experimentally recorded ones. When a shrinkage correction of the masonry products is introduced into the calculation step, this agreement is even better.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Određivanje efektivnog koeficijenta difuzije prilikom sušenja uzoraka od gline
T1  - Calculation of the effective diffusion coefficient during the drying of clay samples
EP  - 533
IS  - 4
SP  - 523
VL  - 77
DO  - 10.2298/JSC110717191V
ER  - 

@article{
author = "Vasić, Miloš and Radojević, Zagorka and Grbavčić, Željko",
year = "2012",
abstract = "Cilj ovog rada je da se na primeru dve opekarske gline sa različitih lokaliteta odredi efektivni koeficijenat difuzije na osnovu eksperimentalno snimljenih krivih sušenja. Razvijen je metod i napravljena su dva kompjuterska programa za određivanje ovog koeficijenta, koji se zasnivaju na matematičkom rešavanju Fikove, odnosno Krankove difuzione jednačine. Po prvi put uzeto je u razmatranje i skupljanje opekarskih proizvoda u toku sušenja a odgovarajuća korekcija je uneta u proračun. Rezultati pokazuju da su vrednosti efektivnog koeficijenta difuzije određeni kompjuterskim programima (sa korekcijom i bez korekcije na skupljanje opekarskih proizvoda) reda veličine koje su navedene u literaturi za druge vrste opekarskih glina. Na osnovu matematičkim putem prognoziranih vrednosti efektivnog koeficijenta difuzije konstatovano je, da bez obzira na polazni mineraloški sastav opekarske sirovine, postoji 90 % slaganja prognoziranih krivih sušenja sa eksperimentalno snimljenim krivima sušenja. Za slučaj kada je uvedena u proračune i korekcija na skupljanje opekarskih proizvoda ovo slaganje je još veće., The aim of this study was to calculate the effective diffusion coefficient based on experimentally recorded drying curves for two masonry clays obtained from different localities. The calculation method and two computer programs based on the mathematical calculation of the Second Fick Law and the Cranck Diffusion Equation were developed. Masonry product shrinkage during drying was taken into consideration for the first time and the appropriate correction was entered into the calculation. The results presented in this paper show that the values of the effective diffusion coefficient determined by the designed computer programs (with and without the correction for shrinkage) have similar values to those available in the literature for the same coefficient for different clays. Based on the mathematically determined prognostic value of the effective diffusion coefficient, it was concluded that, whatever the initial mineralogical composition of the clay, there is 90 % agreement of the calculated prognostic drying curves with the experimentally recorded ones. When a shrinkage correction of the masonry products is introduced into the calculation step, this agreement is even better.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Određivanje efektivnog koeficijenta difuzije prilikom sušenja uzoraka od gline, Calculation of the effective diffusion coefficient during the drying of clay samples",
pages = "533-523",
number = "4",
volume = "77",
doi = "10.2298/JSC110717191V"
}

Vasić, M., Radojević, Z.,& Grbavčić, Ž.. (2012). Određivanje efektivnog koeficijenta difuzije prilikom sušenja uzoraka od gline. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 77(4), 523-533.
https://doi.org/10.2298/JSC110717191V

Vasić M, Radojević Z, Grbavčić Ž. Određivanje efektivnog koeficijenta difuzije prilikom sušenja uzoraka od gline. in Journal of the Serbian Chemical Society. 2012;77(4):523-533.
doi:10.2298/JSC110717191V .

Vasić, Miloš, Radojević, Zagorka, Grbavčić, Željko, "Određivanje efektivnog koeficijenta difuzije prilikom sušenja uzoraka od gline" in Journal of the Serbian Chemical Society, 77, no. 4 (2012):523-533,
https://doi.org/10.2298/JSC110717191V . .

TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/187
AB  - Explanation of the drying process is reduced to the establishment of a series theoretical and empirical drying models. Complex processes of simultaneous mass and energy transfer, which are often non-stationary and the distinct nature and properties of the drying material, complicate even more the description of the drying process. The aim of this study is to find a way to short drying time, to find optimal drying conditions, and to preserve good physical and mechanical characteristics of green masonry products. In order to establish optimal, especially "fast drying" process, it is necessary at the beginning of drying to slowly heat the products while relative humidity within the dryer is kept high. Experimental research was performed in the laboratory recirculation dryer. On the base of laboratory optimization tests, drying process of masonry products in industrial conditions was proposed and optimized.
PB  - ModTech Publishing House
C3  - Modtech 2012: New Face of T M C R, Vols I and II
T1  - Determination of the optimal drying condition during drying of green masonry products
EP  - 1028
SP  - 1025
UR  - https://hdl.handle.net/21.15107/rcub_rims_187
ER  - 

@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2012",
abstract = "Explanation of the drying process is reduced to the establishment of a series theoretical and empirical drying models. Complex processes of simultaneous mass and energy transfer, which are often non-stationary and the distinct nature and properties of the drying material, complicate even more the description of the drying process. The aim of this study is to find a way to short drying time, to find optimal drying conditions, and to preserve good physical and mechanical characteristics of green masonry products. In order to establish optimal, especially "fast drying" process, it is necessary at the beginning of drying to slowly heat the products while relative humidity within the dryer is kept high. Experimental research was performed in the laboratory recirculation dryer. On the base of laboratory optimization tests, drying process of masonry products in industrial conditions was proposed and optimized.",
publisher = "ModTech Publishing House",
journal = "Modtech 2012: New Face of T M C R, Vols I and II",
title = "Determination of the optimal drying condition during drying of green masonry products",
pages = "1028-1025",
url = "https://hdl.handle.net/21.15107/rcub_rims_187"
}

Vasić, M.,& Radojević, Z.. (2012). Determination of the optimal drying condition during drying of green masonry products. in Modtech 2012: New Face of T M C R, Vols I and II
ModTech Publishing House., 1025-1028.
https://hdl.handle.net/21.15107/rcub_rims_187

Vasić M, Radojević Z. Determination of the optimal drying condition during drying of green masonry products. in Modtech 2012: New Face of T M C R, Vols I and II. 2012;:1025-1028.
https://hdl.handle.net/21.15107/rcub_rims_187 .

Vasić, Miloš, Radojević, Zagorka, "Determination of the optimal drying condition during drying of green masonry products" in Modtech 2012: New Face of T M C R, Vols I and II (2012):1025-1028,
https://hdl.handle.net/21.15107/rcub_rims_187 .

TY  - JOUR
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
AU  - Arsenović, Milica
AU  - Grbavčić, Željko
PY  - 2011
UR  - http://rims.institutims.rs/handle/123456789/152
AB  - The equation for drying kinetics is obtained, base on the analytical solution of the differential equation with a boundary condition in the form of the flux. This equation was initially developed by G. Efremov. In this paper a modification of the Efremov drying equation will be presented. Shrinkage correction will be included in that equation for the first time. Two programs were designed to compute the effective diffusion coefficient. First program did not include shrinkage effect during drying into the computation algorithm while the second one has included it. Two models for predicting the drying behavior were obtained as the result of cited programs calculation. First model did not include shrinkage (model 1) and second one (model 2) has included it. The predicted values obtained from model 2 fit with experimental data. Results presented in this study showed that the values of effective diffusion coefficient determined by designed computer programs have similar values with values available in literature related to the same coefficient determined for different clays.
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Determination of the effective diffusion coefficient
EP  - 175
IS  - 2
SP  - 169
VL  - 41
UR  - https://hdl.handle.net/21.15107/rcub_rims_152
ER  - 

@article{
author = "Vasić, Miloš and Radojević, Zagorka and Arsenović, Milica and Grbavčić, Željko",
year = "2011",
abstract = "The equation for drying kinetics is obtained, base on the analytical solution of the differential equation with a boundary condition in the form of the flux. This equation was initially developed by G. Efremov. In this paper a modification of the Efremov drying equation will be presented. Shrinkage correction will be included in that equation for the first time. Two programs were designed to compute the effective diffusion coefficient. First program did not include shrinkage effect during drying into the computation algorithm while the second one has included it. Two models for predicting the drying behavior were obtained as the result of cited programs calculation. First model did not include shrinkage (model 1) and second one (model 2) has included it. The predicted values obtained from model 2 fit with experimental data. Results presented in this study showed that the values of effective diffusion coefficient determined by designed computer programs have similar values with values available in literature related to the same coefficient determined for different clays.",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Determination of the effective diffusion coefficient",
pages = "175-169",
number = "2",
volume = "41",
url = "https://hdl.handle.net/21.15107/rcub_rims_152"
}

Vasić, M., Radojević, Z., Arsenović, M.,& Grbavčić, Ž.. (2011). Determination of the effective diffusion coefficient. in Revista Romana de Materiale/ Romanian Journal of Materials, 41(2), 169-175.
https://hdl.handle.net/21.15107/rcub_rims_152

Vasić M, Radojević Z, Arsenović M, Grbavčić Ž. Determination of the effective diffusion coefficient. in Revista Romana de Materiale/ Romanian Journal of Materials. 2011;41(2):169-175.
https://hdl.handle.net/21.15107/rcub_rims_152 .

Vasić, Miloš, Radojević, Zagorka, Arsenović, Milica, Grbavčić, Željko, "Determination of the effective diffusion coefficient" in Revista Romana de Materiale/ Romanian Journal of Materials, 41, no. 2 (2011):169-175,
https://hdl.handle.net/21.15107/rcub_rims_152 .