Radojević, Zagorka

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Authority KeyName Variants
orcid::0000-0003-2053-2883
  • Radojević, Zagorka (12)
Projects

Author's Bibliography

Mechanical properties and microstructure fractal analysis of refractory bauxite concrete

Terzić, Anja; Mitić, Vojislav V.; Kocić, Ljubiša; Radojević, Zagorka; Pašalić, Snežana

(Belgrade : International Institute for the Science of Sintering, 2015)

TY  - JOUR
AU  - Terzić, Anja
AU  - Mitić, Vojislav V.
AU  - Kocić, Ljubiša
AU  - Radojević, Zagorka
AU  - Pašalić, Snežana
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/3546
AB  - The surface topography analysis via fractals as a means of explanation of composite materials mechanical and microstructural characteristics has hardly been reported so far. This study proposes a method of fractal analysis and its application to refractory bauxite concrete surface tribological investigation. Fractal dimension, profilegrams and fast Fourier transform method are introduced and supported by the adequate software for analysing contours and surface roughness, depending on the observation scale and also numerically depending on horizontal lines intercepted by the investigated profile. Also, the Richardson method and Kaye modification are applied to distinguish textured and structured aspect of grain contour geometry. Microstructural investigation was carried out using a scanning electron microscope. Using the fractals of the grains contact surfaces, a reconstruction of microstructure configuration, as grains shapes or inter-granular contacts, has been performed. Obtained results indicated that fractal analyses of contact surfaces of different shapes were very important for the prognosis of the concrete behaviour. The novel approach to the investigation of refractory concrete properties was successfully conducted, as a result introducing fractal identification as a means of composite materials performances evaluation. © 2015 International Institute for the Science of Sintering (IISS). All rights reserved.
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Mechanical properties and microstructure fractal analysis of refractory bauxite concrete
SP  - 331
EP  - 346
VL  - 47
IS  - 3
DO  - 10.2298/SOS1503331T
UR  - https://hdl.handle.net/21.15107/rcub_dais_3546
ER  - 
@article{
author = "Terzić, Anja and Mitić, Vojislav V. and Kocić, Ljubiša and Radojević, Zagorka and Pašalić, Snežana",
year = "2015",
abstract = "The surface topography analysis via fractals as a means of explanation of composite materials mechanical and microstructural characteristics has hardly been reported so far. This study proposes a method of fractal analysis and its application to refractory bauxite concrete surface tribological investigation. Fractal dimension, profilegrams and fast Fourier transform method are introduced and supported by the adequate software for analysing contours and surface roughness, depending on the observation scale and also numerically depending on horizontal lines intercepted by the investigated profile. Also, the Richardson method and Kaye modification are applied to distinguish textured and structured aspect of grain contour geometry. Microstructural investigation was carried out using a scanning electron microscope. Using the fractals of the grains contact surfaces, a reconstruction of microstructure configuration, as grains shapes or inter-granular contacts, has been performed. Obtained results indicated that fractal analyses of contact surfaces of different shapes were very important for the prognosis of the concrete behaviour. The novel approach to the investigation of refractory concrete properties was successfully conducted, as a result introducing fractal identification as a means of composite materials performances evaluation. © 2015 International Institute for the Science of Sintering (IISS). All rights reserved.",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Mechanical properties and microstructure fractal analysis of refractory bauxite concrete",
pages = "331-346",
volume = "47",
number = "3",
doi = "10.2298/SOS1503331T",
url = "https://hdl.handle.net/21.15107/rcub_dais_3546"
}
Terzić, A., Mitić, V. V., Kocić, L., Radojević, Z.,& Pašalić, S.. (2015). Mechanical properties and microstructure fractal analysis of refractory bauxite concrete. in Science of Sintering
Belgrade : International Institute for the Science of Sintering., 47(3), 331-346.
https://doi.org/10.2298/SOS1503331T
https://hdl.handle.net/21.15107/rcub_dais_3546
Terzić A, Mitić VV, Kocić L, Radojević Z, Pašalić S. Mechanical properties and microstructure fractal analysis of refractory bauxite concrete. in Science of Sintering. 2015;47(3):331-346.
doi:10.2298/SOS1503331T
https://hdl.handle.net/21.15107/rcub_dais_3546 .
Terzić, Anja, Mitić, Vojislav V., Kocić, Ljubiša, Radojević, Zagorka, Pašalić, Snežana, "Mechanical properties and microstructure fractal analysis of refractory bauxite concrete" in Science of Sintering, 47, no. 3 (2015):331-346,
https://doi.org/10.2298/SOS1503331T .,
https://hdl.handle.net/21.15107/rcub_dais_3546 .
7
4
8

Novel utilization of fly ash for high-temperature mortars: Phase composition, microstructure and performances correlation

Terzić, Anja; Pavlović, Ljubica; Radojević, Zagorka; Pavlović, Vladimir B.; Mitić, Vojislav V.

(Hoboken, NJ : John Wiley & Sons, 2015)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pavlović, Ljubica
AU  - Radojević, Zagorka
AU  - Pavlović, Vladimir B.
AU  - Mitić, Vojislav V.
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/3541
AB  - In this study, the feasibility of using fly ash to manufacture high-temperature mortars was investigated. The investigation was set to define preliminary characteristics of new types of mortars based on ordinary and/or refractory cement with fly ash addition, and to establish mutual correlation between thermally induced changes of mineral phases, microstructure, and final performances of the mortars. New mortars, made up of 21% cement (PC-CEM I 42.5R/HAC-Secar 70/71), 70% river sand, and 9% fly ash, were chemically, physically, and mechanically characterized to determine possibilities of fly ash re-utilization for high-temperature purposes. The fly ash samples, which originated from four different power plants, were mechanically activated. Mortars were heat-treated up to 1300°C in a laboratory tunnel furnace with retention time 2 h. Thermal stability of crystalline phases were studied by differential thermal analysis (DTA); thermally induced changes in mineral phase composition were analyzed by XRD; and microstructure were investigated by scanning electron microscopy. Correlated results of DTA, XRD, and SEM analyses indicated initiation of sintering processes at approximately 1300°C and formation of thermally stable minerals (rankinite, gehlenite, anorthite, cristobalite). The investigation highlights a sustainable approach of using fly ash in developing ecofriendly mortars for high-temperature application. © 2013 The American Ceramic Society.
PB  - Hoboken, NJ : John Wiley & Sons
T2  - International Journal of Applied Ceramic Technology
T1  - Novel utilization of fly ash for high-temperature mortars: Phase composition, microstructure and performances correlation
SP  - 133
EP  - 146
VL  - 12
IS  - 1
DO  - 10.1111/ijac.12135
UR  - https://hdl.handle.net/21.15107/rcub_dais_3541
ER  - 
@article{
author = "Terzić, Anja and Pavlović, Ljubica and Radojević, Zagorka and Pavlović, Vladimir B. and Mitić, Vojislav V.",
year = "2015",
abstract = "In this study, the feasibility of using fly ash to manufacture high-temperature mortars was investigated. The investigation was set to define preliminary characteristics of new types of mortars based on ordinary and/or refractory cement with fly ash addition, and to establish mutual correlation between thermally induced changes of mineral phases, microstructure, and final performances of the mortars. New mortars, made up of 21% cement (PC-CEM I 42.5R/HAC-Secar 70/71), 70% river sand, and 9% fly ash, were chemically, physically, and mechanically characterized to determine possibilities of fly ash re-utilization for high-temperature purposes. The fly ash samples, which originated from four different power plants, were mechanically activated. Mortars were heat-treated up to 1300°C in a laboratory tunnel furnace with retention time 2 h. Thermal stability of crystalline phases were studied by differential thermal analysis (DTA); thermally induced changes in mineral phase composition were analyzed by XRD; and microstructure were investigated by scanning electron microscopy. Correlated results of DTA, XRD, and SEM analyses indicated initiation of sintering processes at approximately 1300°C and formation of thermally stable minerals (rankinite, gehlenite, anorthite, cristobalite). The investigation highlights a sustainable approach of using fly ash in developing ecofriendly mortars for high-temperature application. © 2013 The American Ceramic Society.",
publisher = "Hoboken, NJ : John Wiley & Sons",
journal = "International Journal of Applied Ceramic Technology",
title = "Novel utilization of fly ash for high-temperature mortars: Phase composition, microstructure and performances correlation",
pages = "133-146",
volume = "12",
number = "1",
doi = "10.1111/ijac.12135",
url = "https://hdl.handle.net/21.15107/rcub_dais_3541"
}
Terzić, A., Pavlović, L., Radojević, Z., Pavlović, V. B.,& Mitić, V. V.. (2015). Novel utilization of fly ash for high-temperature mortars: Phase composition, microstructure and performances correlation. in International Journal of Applied Ceramic Technology
Hoboken, NJ : John Wiley & Sons., 12(1), 133-146.
https://doi.org/10.1111/ijac.12135
https://hdl.handle.net/21.15107/rcub_dais_3541
Terzić A, Pavlović L, Radojević Z, Pavlović VB, Mitić VV. Novel utilization of fly ash for high-temperature mortars: Phase composition, microstructure and performances correlation. in International Journal of Applied Ceramic Technology. 2015;12(1):133-146.
doi:10.1111/ijac.12135
https://hdl.handle.net/21.15107/rcub_dais_3541 .
Terzić, Anja, Pavlović, Ljubica, Radojević, Zagorka, Pavlović, Vladimir B., Mitić, Vojislav V., "Novel utilization of fly ash for high-temperature mortars: Phase composition, microstructure and performances correlation" in International Journal of Applied Ceramic Technology, 12, no. 1 (2015):133-146,
https://doi.org/10.1111/ijac.12135 .,
https://hdl.handle.net/21.15107/rcub_dais_3541 .
22
14
24

Artificial fly ash based aggregates properties influence on lightweight concrete performances

Terzić, Anja; Pezo, Lato; Mitić, Vojislav V.; Radojević, Zagorka

(Elsevier, 2015)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Mitić, Vojislav V.
AU  - Radojević, Zagorka
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/3536
AB  - The effect of the application of pelletized fly ash based aggregates obtained through different processing techniques on the behavior of lightweight concretes was analyzed. Experimental program implied production of four lightweight artificial aggregates - cold bonded and sintered pellets based on either mechanically activated or non-activated low-calcium fly ash and water glass. The lightweight concrete behavior was compared to that of normal-weight concrete through compressive strength, flexural strength, porosity, shrinkage, and modulus of elasticity investigation. Differences in concretes characteristics were discussed with SEM imagining support. The statistical analysis of lightweight aggregate and ash properties contribution on concrete performances was realized by analysis variance model (ANOVA). Optimal production combination that maximizes lightweight concrete performance was determined by employing response surface methodology. An increase in concrete strength induced by the increase in ash fineness was noticed. Mechanical activation also had effect on the pellets sintering period and sintering temperature reduction. The 28- and 56-day lightweight concrete specimens exhibited properties that met the requirements for normal-weight concretes. Finally, the ideal combinations of ash pellets production parameters and properties that gave the lightweight concrete with behavior matching to that of standard concrete were established. The production capability of lightweight concrete with advanced performances based on artificial aggregate approves the principle of waste material reusing and enables cleaner and economically sustainable concrete manufacturing procedure. © 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
PB  - Elsevier
T2  - Ceramics International
T1  - Artificial fly ash based aggregates properties influence on lightweight concrete performances
SP  - 2714
EP  - 2726
VL  - 41
IS  - 2
DO  - 10.1016/j.ceramint.2014.10.086
UR  - https://hdl.handle.net/21.15107/rcub_dais_3536
ER  - 
@article{
author = "Terzić, Anja and Pezo, Lato and Mitić, Vojislav V. and Radojević, Zagorka",
year = "2015",
abstract = "The effect of the application of pelletized fly ash based aggregates obtained through different processing techniques on the behavior of lightweight concretes was analyzed. Experimental program implied production of four lightweight artificial aggregates - cold bonded and sintered pellets based on either mechanically activated or non-activated low-calcium fly ash and water glass. The lightweight concrete behavior was compared to that of normal-weight concrete through compressive strength, flexural strength, porosity, shrinkage, and modulus of elasticity investigation. Differences in concretes characteristics were discussed with SEM imagining support. The statistical analysis of lightweight aggregate and ash properties contribution on concrete performances was realized by analysis variance model (ANOVA). Optimal production combination that maximizes lightweight concrete performance was determined by employing response surface methodology. An increase in concrete strength induced by the increase in ash fineness was noticed. Mechanical activation also had effect on the pellets sintering period and sintering temperature reduction. The 28- and 56-day lightweight concrete specimens exhibited properties that met the requirements for normal-weight concretes. Finally, the ideal combinations of ash pellets production parameters and properties that gave the lightweight concrete with behavior matching to that of standard concrete were established. The production capability of lightweight concrete with advanced performances based on artificial aggregate approves the principle of waste material reusing and enables cleaner and economically sustainable concrete manufacturing procedure. © 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Artificial fly ash based aggregates properties influence on lightweight concrete performances",
pages = "2714-2726",
volume = "41",
number = "2",
doi = "10.1016/j.ceramint.2014.10.086",
url = "https://hdl.handle.net/21.15107/rcub_dais_3536"
}
Terzić, A., Pezo, L., Mitić, V. V.,& Radojević, Z.. (2015). Artificial fly ash based aggregates properties influence on lightweight concrete performances. in Ceramics International
Elsevier., 41(2), 2714-2726.
https://doi.org/10.1016/j.ceramint.2014.10.086
https://hdl.handle.net/21.15107/rcub_dais_3536
Terzić A, Pezo L, Mitić VV, Radojević Z. Artificial fly ash based aggregates properties influence on lightweight concrete performances. in Ceramics International. 2015;41(2):2714-2726.
doi:10.1016/j.ceramint.2014.10.086
https://hdl.handle.net/21.15107/rcub_dais_3536 .
Terzić, Anja, Pezo, Lato, Mitić, Vojislav V., Radojević, Zagorka, "Artificial fly ash based aggregates properties influence on lightweight concrete performances" in Ceramics International, 41, no. 2 (2015):2714-2726,
https://doi.org/10.1016/j.ceramint.2014.10.086 .,
https://hdl.handle.net/21.15107/rcub_dais_3536 .
62
31
66

Thermal behaviour of concretes with micro silica addition

Terzić, Anja; Obradović, Nina; Miličić, Ljiljana; Radojević, Zagorka

(Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry, 2015)

TY  - CONF
AU  - Terzić, Anja
AU  - Obradović, Nina
AU  - Miličić, Ljiljana
AU  - Radojević, Zagorka
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/760
AB  - A comparative study of several concrete composites with different quantities of micro silica was conducted. The effect that micro silica addition has on the behavior of concrete was discussed. The experimental program implied production of "referent" concrete composite based on Portland cement and river sand, and concretes with 5, 10, and 15 wt.% addition of micro silica. Micro silica was used as micro filler in the concrete mass. The influence of this additive on the concrete mechanical properties and on its thermal behavior was investigated. This research highlighted the role that fine micro silica particles have in improvement of composite microstructure packing, the decrease of the porosities values and enhancement in the compressive strength due to the decrease in pore size. The thermal behavior of the concretes was studied at temperatures ranging from ambient to 1100°C as adopted maximum. Mechanisms of thermally induced processes were observed by differential thermal analysis, at 10°C min-1 heating rates, and by thermo gravimetric analysis. The variations in concretes performances were discussed with support of scanning electron
microscope imagining and X-ray diffraction results. The composites with addition of micro silica exhibited properties that met the requirements for the concretes suitable for use in severe conditions and environments.
PB  - Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry
C3  - 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts
T1  - Thermal behaviour of concretes with micro silica addition
SP  - 271
EP  - 271
UR  - https://hdl.handle.net/21.15107/rcub_dais_760
ER  - 
@conference{
author = "Terzić, Anja and Obradović, Nina and Miličić, Ljiljana and Radojević, Zagorka",
year = "2015",
abstract = "A comparative study of several concrete composites with different quantities of micro silica was conducted. The effect that micro silica addition has on the behavior of concrete was discussed. The experimental program implied production of "referent" concrete composite based on Portland cement and river sand, and concretes with 5, 10, and 15 wt.% addition of micro silica. Micro silica was used as micro filler in the concrete mass. The influence of this additive on the concrete mechanical properties and on its thermal behavior was investigated. This research highlighted the role that fine micro silica particles have in improvement of composite microstructure packing, the decrease of the porosities values and enhancement in the compressive strength due to the decrease in pore size. The thermal behavior of the concretes was studied at temperatures ranging from ambient to 1100°C as adopted maximum. Mechanisms of thermally induced processes were observed by differential thermal analysis, at 10°C min-1 heating rates, and by thermo gravimetric analysis. The variations in concretes performances were discussed with support of scanning electron
microscope imagining and X-ray diffraction results. The composites with addition of micro silica exhibited properties that met the requirements for the concretes suitable for use in severe conditions and environments.",
publisher = "Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry",
journal = "3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts",
title = "Thermal behaviour of concretes with micro silica addition",
pages = "271-271",
url = "https://hdl.handle.net/21.15107/rcub_dais_760"
}
Terzić, A., Obradović, N., Miličić, L.,& Radojević, Z.. (2015). Thermal behaviour of concretes with micro silica addition. in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts
Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry., 271-271.
https://hdl.handle.net/21.15107/rcub_dais_760
Terzić A, Obradović N, Miličić L, Radojević Z. Thermal behaviour of concretes with micro silica addition. in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts. 2015;:271-271.
https://hdl.handle.net/21.15107/rcub_dais_760 .
Terzić, Anja, Obradović, Nina, Miličić, Ljiljana, Radojević, Zagorka, "Thermal behaviour of concretes with micro silica addition" in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts (2015):271-271,
https://hdl.handle.net/21.15107/rcub_dais_760 .

Prediction and Optimization of Heavy Clay Products Quality

Arsenović, Milica; Pezo, Lato; Mančić, Lidija; Radojević, Zagorka

(Wiley Blackwell, 2014)

TY  - CHAP
AU  - Arsenović, Milica
AU  - Pezo, Lato
AU  - Mančić, Lidija
AU  - Radojević, Zagorka
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/15206
AB  - The effects of chemical composition, firing temperature (800-1100 °C), and several shape formats of laboratory brick samples on the final product quality were investigated. Prediction of the final laboratory products parameters was evaluated by second order polynomial regression models (SOPs) and artificial neural networks (ANNs), and aft erwards compared to experimental results. SOPs showed high r2 values (0.897-0.913 for compressive strength models, 0.942-0.962 for water absorption, 0.928 for firing shrinkage, 0.988-0.991 for water loss during firing, and 0.941 for volume mass of cubes models). An ANN model, coupled with sensitivity analysis, was obtained with high prediction accuracy: 0.866-0.939 for compressive strength models, 0.954-0.974 for water absorption, 0.882 for firing shrinkage, 0.982-0.988 for water loss during firing, and 0.920 for volume mass of cubes models. The optimal samples' chemical composition and firing temperature were chosen depending on a final usage of the raw material in heavy clay brick industry.
PB  - Wiley Blackwell
T2  - Advanced Materials for Agriculture, Food and Environmental Safety
T1  - Prediction and Optimization of Heavy Clay Products Quality
SP  - 87
EP  - 120
DO  - 10.1002/9781118773857.ch4
UR  - https://hdl.handle.net/21.15107/rcub_dais_15206
ER  - 
@inbook{
author = "Arsenović, Milica and Pezo, Lato and Mančić, Lidija and Radojević, Zagorka",
year = "2014",
abstract = "The effects of chemical composition, firing temperature (800-1100 °C), and several shape formats of laboratory brick samples on the final product quality were investigated. Prediction of the final laboratory products parameters was evaluated by second order polynomial regression models (SOPs) and artificial neural networks (ANNs), and aft erwards compared to experimental results. SOPs showed high r2 values (0.897-0.913 for compressive strength models, 0.942-0.962 for water absorption, 0.928 for firing shrinkage, 0.988-0.991 for water loss during firing, and 0.941 for volume mass of cubes models). An ANN model, coupled with sensitivity analysis, was obtained with high prediction accuracy: 0.866-0.939 for compressive strength models, 0.954-0.974 for water absorption, 0.882 for firing shrinkage, 0.982-0.988 for water loss during firing, and 0.920 for volume mass of cubes models. The optimal samples' chemical composition and firing temperature were chosen depending on a final usage of the raw material in heavy clay brick industry.",
publisher = "Wiley Blackwell",
journal = "Advanced Materials for Agriculture, Food and Environmental Safety",
booktitle = "Prediction and Optimization of Heavy Clay Products Quality",
pages = "87-120",
doi = "10.1002/9781118773857.ch4",
url = "https://hdl.handle.net/21.15107/rcub_dais_15206"
}
Arsenović, M., Pezo, L., Mančić, L.,& Radojević, Z.. (2014). Prediction and Optimization of Heavy Clay Products Quality. in Advanced Materials for Agriculture, Food and Environmental Safety
Wiley Blackwell., 87-120.
https://doi.org/10.1002/9781118773857.ch4
https://hdl.handle.net/21.15107/rcub_dais_15206
Arsenović M, Pezo L, Mančić L, Radojević Z. Prediction and Optimization of Heavy Clay Products Quality. in Advanced Materials for Agriculture, Food and Environmental Safety. 2014;:87-120.
doi:10.1002/9781118773857.ch4
https://hdl.handle.net/21.15107/rcub_dais_15206 .
Arsenović, Milica, Pezo, Lato, Mančić, Lidija, Radojević, Zagorka, "Prediction and Optimization of Heavy Clay Products Quality" in Advanced Materials for Agriculture, Food and Environmental Safety (2014):87-120,
https://doi.org/10.1002/9781118773857.ch4 .,
https://hdl.handle.net/21.15107/rcub_dais_15206 .

Thermal and mineralogical characterization of loess heavy clays for potential use in brick industry

Arsenović, Milica; Pezo, Lato; Mančić, Lidija; Radojević, Zagorka

(Elsevier, 2014)

TY  - JOUR
AU  - Arsenović, Milica
AU  - Pezo, Lato
AU  - Mančić, Lidija
AU  - Radojević, Zagorka
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/640
AB  - This paper describes a study of 11 selected samples of loess soil from Serbia, by using differential scanning calorimetry, simultaneously with thermogravimetry and its differential calculation, known as simultaneous thermal analysis (STA). This survey is supplemented by chemical and mineralogical analysis, particle size distribution, and plasticity and drying susceptibility tests. Correlation analysis of major oxides content and certain technological test results were used for better understanding of the raw material composition and product physical properties. The results indicate that the samples were rich in carbonates, with the highest content of alevrite fraction and variable content of clay-sized particles. Mineralogical analysis confirms significant correlations between major oxides content and reveals that the most common non-clay mineral present is quartz, followed by calcite, dolomite and sodium feldspar. Major clay minerals include illite, chlorite, smectite and, in some cases, low quantities of kaolinite. Although STA method is well-known, this is the first time that it was used for discussion about its practical aspect, for characterization of the loess deposits, in terms of exploitation in brick industry.
PB  - Elsevier
T2  - Thermochimica Acta
T1  - Thermal and mineralogical characterization of loess heavy clays for potential use in brick industry
SP  - 38
EP  - 45
VL  - 20
DO  - 10.1016/j.tca.2014.01.026
UR  - https://hdl.handle.net/21.15107/rcub_dais_640
ER  - 
@article{
author = "Arsenović, Milica and Pezo, Lato and Mančić, Lidija and Radojević, Zagorka",
year = "2014",
abstract = "This paper describes a study of 11 selected samples of loess soil from Serbia, by using differential scanning calorimetry, simultaneously with thermogravimetry and its differential calculation, known as simultaneous thermal analysis (STA). This survey is supplemented by chemical and mineralogical analysis, particle size distribution, and plasticity and drying susceptibility tests. Correlation analysis of major oxides content and certain technological test results were used for better understanding of the raw material composition and product physical properties. The results indicate that the samples were rich in carbonates, with the highest content of alevrite fraction and variable content of clay-sized particles. Mineralogical analysis confirms significant correlations between major oxides content and reveals that the most common non-clay mineral present is quartz, followed by calcite, dolomite and sodium feldspar. Major clay minerals include illite, chlorite, smectite and, in some cases, low quantities of kaolinite. Although STA method is well-known, this is the first time that it was used for discussion about its practical aspect, for characterization of the loess deposits, in terms of exploitation in brick industry.",
publisher = "Elsevier",
journal = "Thermochimica Acta",
title = "Thermal and mineralogical characterization of loess heavy clays for potential use in brick industry",
pages = "38-45",
volume = "20",
doi = "10.1016/j.tca.2014.01.026",
url = "https://hdl.handle.net/21.15107/rcub_dais_640"
}
Arsenović, M., Pezo, L., Mančić, L.,& Radojević, Z.. (2014). Thermal and mineralogical characterization of loess heavy clays for potential use in brick industry. in Thermochimica Acta
Elsevier., 20, 38-45.
https://doi.org/10.1016/j.tca.2014.01.026
https://hdl.handle.net/21.15107/rcub_dais_640
Arsenović M, Pezo L, Mančić L, Radojević Z. Thermal and mineralogical characterization of loess heavy clays for potential use in brick industry. in Thermochimica Acta. 2014;20:38-45.
doi:10.1016/j.tca.2014.01.026
https://hdl.handle.net/21.15107/rcub_dais_640 .
Arsenović, Milica, Pezo, Lato, Mančić, Lidija, Radojević, Zagorka, "Thermal and mineralogical characterization of loess heavy clays for potential use in brick industry" in Thermochimica Acta, 20 (2014):38-45,
https://doi.org/10.1016/j.tca.2014.01.026 .,
https://hdl.handle.net/21.15107/rcub_dais_640 .
35
23
33

Corundum and Bauxite Refractory Shotcretes based on Activated Waste Coal Ash: Investigation of Thermally Induced Properties Change

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

(Belgrade : Serbian Ceramic Society, 2014)

TY  - CONF
AU  - Terzić, Anja
AU  - Radojević, Zagorka
AU  - Miličić, Ljiljana
AU  - Obradović, Nina
AU  - Andrić, Ljubiša
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/604
AB  - The necessity for application of activated secondary raw materials in refractory industry is caused by a growing demand for refractory castables with advanced properties and continuous technological evolution of high-temperature materials. In this investigation, refractory shotcretes with the same matrix composition were prepared from 15 wt.% of high aluminate cement and 45 wt.% of bauxite aggregate + 30 wt.% of chamotte filler, i.e. 75% of corundum aggregate. The request for obtaining a low-cement castable is fulfilled by application of 10 wt.% of mechanically activated coal ash as the cement substitution in the shotcretes. The ash was activated by means of various high energy mechano-activators. Results were compared in order to choose the most efficient activation procedure. The properties have been studied at temperatures ranging from room temperature to adopted maximal temperature 1400°C. Mechanisms of hydration and sintering were investigated by means of differential thermal analysis at three different heating rates. The measurements showed different activation energies for ordinary shotcretes and shotcretes with activated ash. The evolution of the refractory shotcretes properties was investigated and correlated to microstructural changes induced by temperature and microfiller addition. The combination of advantages in investigated refractory shotcretes makes them suitable for use in severe conditions at high temperature applications especially in refractory industries.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014
T1  - Corundum and Bauxite Refractory Shotcretes based on Activated Waste Coal Ash: Investigation of Thermally Induced Properties Change
SP  - 70
EP  - 70
UR  - https://hdl.handle.net/21.15107/rcub_dais_604
ER  - 
@conference{
author = "Terzić, Anja and Radojević, Zagorka and Miličić, Ljiljana and Obradović, Nina and Andrić, Ljubiša",
year = "2014",
abstract = "The necessity for application of activated secondary raw materials in refractory industry is caused by a growing demand for refractory castables with advanced properties and continuous technological evolution of high-temperature materials. In this investigation, refractory shotcretes with the same matrix composition were prepared from 15 wt.% of high aluminate cement and 45 wt.% of bauxite aggregate + 30 wt.% of chamotte filler, i.e. 75% of corundum aggregate. The request for obtaining a low-cement castable is fulfilled by application of 10 wt.% of mechanically activated coal ash as the cement substitution in the shotcretes. The ash was activated by means of various high energy mechano-activators. Results were compared in order to choose the most efficient activation procedure. The properties have been studied at temperatures ranging from room temperature to adopted maximal temperature 1400°C. Mechanisms of hydration and sintering were investigated by means of differential thermal analysis at three different heating rates. The measurements showed different activation energies for ordinary shotcretes and shotcretes with activated ash. The evolution of the refractory shotcretes properties was investigated and correlated to microstructural changes induced by temperature and microfiller addition. The combination of advantages in investigated refractory shotcretes makes them suitable for use in severe conditions at high temperature applications especially in refractory industries.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014",
title = "Corundum and Bauxite Refractory Shotcretes based on Activated Waste Coal Ash: Investigation of Thermally Induced Properties Change",
pages = "70-70",
url = "https://hdl.handle.net/21.15107/rcub_dais_604"
}
Terzić, A., Radojević, Z., Miličić, L., Obradović, N.,& Andrić, L.. (2014). Corundum and Bauxite Refractory Shotcretes based on Activated Waste Coal Ash: Investigation of Thermally Induced Properties Change. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014
Belgrade : Serbian Ceramic Society., 70-70.
https://hdl.handle.net/21.15107/rcub_dais_604
Terzić A, Radojević Z, Miličić L, Obradović N, Andrić L. Corundum and Bauxite Refractory Shotcretes based on Activated Waste Coal Ash: Investigation of Thermally Induced Properties Change. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014. 2014;:70-70.
https://hdl.handle.net/21.15107/rcub_dais_604 .
Terzić, Anja, Radojević, Zagorka, Miličić, Ljiljana, Obradović, Nina, Andrić, Ljubiša, "Corundum and Bauxite Refractory Shotcretes based on Activated Waste Coal Ash: Investigation of Thermally Induced Properties Change" in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014 (2014):70-70,
https://hdl.handle.net/21.15107/rcub_dais_604 .

Advanced Optimization of Heavy Clay Products Quality by Using Artificial Neural Network Model

Arsenović, Milica; Pezo, Lato; Mančić, Lidija; Radojević, Zagorka

(Belgrade : Serbian Ceramic Society, 2014)

TY  - CONF
AU  - Arsenović, Milica
AU  - Pezo, Lato
AU  - Mančić, Lidija
AU  - Radojević, Zagorka
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/602
AB  - The effects of firing temperature (800–1100°C), chemical composition (expressed in terms of the content of major oxides - SiO2, Al2O3, Fe2O3, CaO, MgO, Na2O, K2O, MnO and TiO2), as well as several shape formats of laboratory brick samples on the final product quality were investigated. Prediction of the final laboratory products parameters was evaluated by second order polynomial regression models (SOPs) and artificial neural networks (ANNs), and afterwards both models were compared to one another and to experimental results. . Observed parameters of fired products that were determined in this study were: compressive strength (CS), water absorption (WA), firing shrinkage (FS), weight loss during firing (WLF) and volume mass of cubes (VMC). SOPs showed high r2 values (0.897 - 0.913 for compressive strength models, 0.942-0.962 for water absorption, 0.928 for firing shrinkage, 0.988-0.991 for water loss during firing and 0.941 for volume mass of cubes models). ANN model, coupled with sensitivity analysis, was obtained with high prediction accuracy: 0.866–0.939 for compressive strength models, 0.954–0.974 for water absorption, 0.882 for firing shrinkage, 0.982-0.988 for water loss during firing and 0.920 for volume mass of cubes models. The optimal samples chemical composition and firing temperature were chosen depending on a final usage of the raw material in heavy clay brick industry.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014
T1  - Advanced Optimization of Heavy Clay Products Quality by Using Artificial Neural Network Model
SP  - 82
EP  - 82
UR  - https://hdl.handle.net/21.15107/rcub_dais_602
ER  - 
@conference{
author = "Arsenović, Milica and Pezo, Lato and Mančić, Lidija and Radojević, Zagorka",
year = "2014",
abstract = "The effects of firing temperature (800–1100°C), chemical composition (expressed in terms of the content of major oxides - SiO2, Al2O3, Fe2O3, CaO, MgO, Na2O, K2O, MnO and TiO2), as well as several shape formats of laboratory brick samples on the final product quality were investigated. Prediction of the final laboratory products parameters was evaluated by second order polynomial regression models (SOPs) and artificial neural networks (ANNs), and afterwards both models were compared to one another and to experimental results. . Observed parameters of fired products that were determined in this study were: compressive strength (CS), water absorption (WA), firing shrinkage (FS), weight loss during firing (WLF) and volume mass of cubes (VMC). SOPs showed high r2 values (0.897 - 0.913 for compressive strength models, 0.942-0.962 for water absorption, 0.928 for firing shrinkage, 0.988-0.991 for water loss during firing and 0.941 for volume mass of cubes models). ANN model, coupled with sensitivity analysis, was obtained with high prediction accuracy: 0.866–0.939 for compressive strength models, 0.954–0.974 for water absorption, 0.882 for firing shrinkage, 0.982-0.988 for water loss during firing and 0.920 for volume mass of cubes models. The optimal samples chemical composition and firing temperature were chosen depending on a final usage of the raw material in heavy clay brick industry.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014",
title = "Advanced Optimization of Heavy Clay Products Quality by Using Artificial Neural Network Model",
pages = "82-82",
url = "https://hdl.handle.net/21.15107/rcub_dais_602"
}
Arsenović, M., Pezo, L., Mančić, L.,& Radojević, Z.. (2014). Advanced Optimization of Heavy Clay Products Quality by Using Artificial Neural Network Model. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014
Belgrade : Serbian Ceramic Society., 82-82.
https://hdl.handle.net/21.15107/rcub_dais_602
Arsenović M, Pezo L, Mančić L, Radojević Z. Advanced Optimization of Heavy Clay Products Quality by Using Artificial Neural Network Model. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014. 2014;:82-82.
https://hdl.handle.net/21.15107/rcub_dais_602 .
Arsenović, Milica, Pezo, Lato, Mančić, Lidija, Radojević, Zagorka, "Advanced Optimization of Heavy Clay Products Quality by Using Artificial Neural Network Model" in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014 (2014):82-82,
https://hdl.handle.net/21.15107/rcub_dais_602 .

Lightweight construction ceramic composites based of pelletized fly ash aggregate

Terzić, Anja; Radojević, Zagorka; Miličić, Ljiljana; Obradović, Nina; Pavlović, Vladimir B.; Pavlović, Ljubica

(Belgrade : Serbian Ceramic Society, 2013)

TY  - CONF
AU  - Terzić, Anja
AU  - Radojević, Zagorka
AU  - Miličić, Ljiljana
AU  - Obradović, Nina
AU  - Pavlović, Vladimir B.
AU  - Pavlović, Ljubica
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/413
AB  - As coal combustion byproduct fly ash represents a risk for environment: direct ash emission from open land-fills causes pollution of air, soil and water. The solution for this severe pollution problem is fly ash reapplication in various construction ceramic composite materials. Although pelletization of waste powdery material is a known technique in the production of artificial aggregates, it still has not been widely used in construction sector. Here investigated cold-bonded fly ash aggregate was produced in semi-industrial pelletizing device. The fly ash particles were bonded with water-glass (Sodium silicate - Na2SiO3) and used as substitution for aggregate in Portland cement based composite. Half of the produced lightweight aggregate was submitted to thermal treatment and afterwards applied in the construction composite in the same ration as in the case of cold-bonded pellets. The performance characteristics of two types of lightweight composites were mutually compared and afterwards correlated with characteristics of normal-weight concrete. Compressive strength, modulus of elasticity and tensile strength were used as represents of the composites mechanical behavior. Mineral constituents of fly ash pellets were analyzed by means of X-ray diffraction analysis, differential thermal analysis was applied in crystalline phase investigation, and scanning electron microscopy in microstructural analysis. The leaching behavior and environmental impact of hazardous elements were also analyzed. It was concluded that content of potentially toxic elements found in leachate of fly-ash based composites was far below tolerance limit proposed by actual standards for the building materials, characterizing the fly ash non-harmful secondary raw material and enabling its reapplication in building materials industry. Utilizing fly ash to produce quality aggregates should yield significant environmental benefits.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade
T1  - Lightweight construction ceramic composites based of pelletized fly ash aggregate
SP  - 32
EP  - 33
UR  - https://hdl.handle.net/21.15107/rcub_dais_413
ER  - 
@conference{
author = "Terzić, Anja and Radojević, Zagorka and Miličić, Ljiljana and Obradović, Nina and Pavlović, Vladimir B. and Pavlović, Ljubica",
year = "2013",
abstract = "As coal combustion byproduct fly ash represents a risk for environment: direct ash emission from open land-fills causes pollution of air, soil and water. The solution for this severe pollution problem is fly ash reapplication in various construction ceramic composite materials. Although pelletization of waste powdery material is a known technique in the production of artificial aggregates, it still has not been widely used in construction sector. Here investigated cold-bonded fly ash aggregate was produced in semi-industrial pelletizing device. The fly ash particles were bonded with water-glass (Sodium silicate - Na2SiO3) and used as substitution for aggregate in Portland cement based composite. Half of the produced lightweight aggregate was submitted to thermal treatment and afterwards applied in the construction composite in the same ration as in the case of cold-bonded pellets. The performance characteristics of two types of lightweight composites were mutually compared and afterwards correlated with characteristics of normal-weight concrete. Compressive strength, modulus of elasticity and tensile strength were used as represents of the composites mechanical behavior. Mineral constituents of fly ash pellets were analyzed by means of X-ray diffraction analysis, differential thermal analysis was applied in crystalline phase investigation, and scanning electron microscopy in microstructural analysis. The leaching behavior and environmental impact of hazardous elements were also analyzed. It was concluded that content of potentially toxic elements found in leachate of fly-ash based composites was far below tolerance limit proposed by actual standards for the building materials, characterizing the fly ash non-harmful secondary raw material and enabling its reapplication in building materials industry. Utilizing fly ash to produce quality aggregates should yield significant environmental benefits.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade",
title = "Lightweight construction ceramic composites based of pelletized fly ash aggregate",
pages = "32-33",
url = "https://hdl.handle.net/21.15107/rcub_dais_413"
}
Terzić, A., Radojević, Z., Miličić, L., Obradović, N., Pavlović, V. B.,& Pavlović, L.. (2013). Lightweight construction ceramic composites based of pelletized fly ash aggregate. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade
Belgrade : Serbian Ceramic Society., 32-33.
https://hdl.handle.net/21.15107/rcub_dais_413
Terzić A, Radojević Z, Miličić L, Obradović N, Pavlović VB, Pavlović L. Lightweight construction ceramic composites based of pelletized fly ash aggregate. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade. 2013;:32-33.
https://hdl.handle.net/21.15107/rcub_dais_413 .
Terzić, Anja, Radojević, Zagorka, Miličić, Ljiljana, Obradović, Nina, Pavlović, Vladimir B., Pavlović, Ljubica, "Lightweight construction ceramic composites based of pelletized fly ash aggregate" in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade (2013):32-33,
https://hdl.handle.net/21.15107/rcub_dais_413 .

Optimization of the production process through response surface method: Bricks made of loess

Arsenović, Milica; Stanković, Slavka; Pezo, Lato; Mančić, Lidija; Radojević, Zagorka

(Elsevier, 2013)

TY  - JOUR
AU  - Arsenović, Milica
AU  - Stanković, Slavka
AU  - Pezo, Lato
AU  - Mančić, Lidija
AU  - Radojević, Zagorka
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/341
AB  - Loess clays are commonly used to produce bricks. Heavy clays, taken at location near Zrenjanin, Serbia, are used as a representative raw material in this study. The sample, containing about 28% of clay sized particles, is enriched using two more plastic heavy clays from neighboring locations. Chemical and mineralogical content of clays is determined, as well as particle size distribution. Optimization of the processing parameters during the bricks production, i. e. temperature (900–1100 °C), and concentration of 2 clays combined addition (both in the range of 0–10%), is done based on the following independent parameters: compressive strength (CS), water absorption (WA), firing shrinkage (FS), weight loss during firing (WLF) and apparent density expressed as volume mass of cubes (VMC). Developed models showed r2 values in the range of 0.822–0.998, and they were able to accurately predict CS, WA, FS, WLF and VMC in a wide range of processing parameters. The optimum conditions are determined by the response surface method (RSM), coupled with the fuzzy synthetic evaluation (FSE) algorithm, using membership trapezoidal function, with defined optimal interval values, depending on a final usage of the raw material in heavy clay brick industry.
PB  - Elsevier
T2  - Ceramics International
T1  - Optimization of the production process through response surface method: Bricks made of loess
SP  - 3065
EP  - 3075
VL  - 39
IS  - 3
DO  - 10.1016/j.ceramint.2012.09.086
UR  - https://hdl.handle.net/21.15107/rcub_dais_341
ER  - 
@article{
author = "Arsenović, Milica and Stanković, Slavka and Pezo, Lato and Mančić, Lidija and Radojević, Zagorka",
year = "2013",
abstract = "Loess clays are commonly used to produce bricks. Heavy clays, taken at location near Zrenjanin, Serbia, are used as a representative raw material in this study. The sample, containing about 28% of clay sized particles, is enriched using two more plastic heavy clays from neighboring locations. Chemical and mineralogical content of clays is determined, as well as particle size distribution. Optimization of the processing parameters during the bricks production, i. e. temperature (900–1100 °C), and concentration of 2 clays combined addition (both in the range of 0–10%), is done based on the following independent parameters: compressive strength (CS), water absorption (WA), firing shrinkage (FS), weight loss during firing (WLF) and apparent density expressed as volume mass of cubes (VMC). Developed models showed r2 values in the range of 0.822–0.998, and they were able to accurately predict CS, WA, FS, WLF and VMC in a wide range of processing parameters. The optimum conditions are determined by the response surface method (RSM), coupled with the fuzzy synthetic evaluation (FSE) algorithm, using membership trapezoidal function, with defined optimal interval values, depending on a final usage of the raw material in heavy clay brick industry.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Optimization of the production process through response surface method: Bricks made of loess",
pages = "3065-3075",
volume = "39",
number = "3",
doi = "10.1016/j.ceramint.2012.09.086",
url = "https://hdl.handle.net/21.15107/rcub_dais_341"
}
Arsenović, M., Stanković, S., Pezo, L., Mančić, L.,& Radojević, Z.. (2013). Optimization of the production process through response surface method: Bricks made of loess. in Ceramics International
Elsevier., 39(3), 3065-3075.
https://doi.org/10.1016/j.ceramint.2012.09.086
https://hdl.handle.net/21.15107/rcub_dais_341
Arsenović M, Stanković S, Pezo L, Mančić L, Radojević Z. Optimization of the production process through response surface method: Bricks made of loess. in Ceramics International. 2013;39(3):3065-3075.
doi:10.1016/j.ceramint.2012.09.086
https://hdl.handle.net/21.15107/rcub_dais_341 .
Arsenović, Milica, Stanković, Slavka, Pezo, Lato, Mančić, Lidija, Radojević, Zagorka, "Optimization of the production process through response surface method: Bricks made of loess" in Ceramics International, 39, no. 3 (2013):3065-3075,
https://doi.org/10.1016/j.ceramint.2012.09.086 .,
https://hdl.handle.net/21.15107/rcub_dais_341 .
25
9
28

Synthesis and sintering of high-temperature composites based on mechanically activated fly ash

Terzić, Anja; Pavlović, Ljubica; Obradović, Nina; Pavlović, Vladimir B.; Stojanović, J.; Miličić, Lj.; Radojević, Zagorka; Ristić, Momčilo M.

(Belgrade : International Institute for the Science of Sintering, 2012)

TY  - JOUR
AU  - Terzić, Anja
AU  - Pavlović, Ljubica
AU  - Obradović, Nina
AU  - Pavlović, Vladimir B.
AU  - Stojanović, J.
AU  - Miličić, Lj.
AU  - Radojević, Zagorka
AU  - Ristić, Momčilo M.
PY  - 2012
UR  - https://dais.sanu.ac.rs/123456789/193
AB  - Amount of fly ash which is and yet to be generated in the coming years highlights the necessity of developing new methods of the recycling where this waste can be reused in significant quantity. A new possibility for fly ash utilization is in high-temperature application (thermal insulators or/and refractory material products). As such, fly ash has to adequately answer the mechanical and thermal stability criteria. One of the ways of achieving it is by applying mechanical activation procedure on fly ash. In present study, fly ashes from two different power plants were mechanically activated in a planetary ball mill. Mechanically treated fly ashes were cemented with two different binders: standard Portland cement and high-aluminates cement. Physico-chemical analysis and investigation of mineralogical components of composites are emphasized, due to the changes occurred in fly ash during mechanical activation and sintering of composites. Macro-performance of the composites was correlated to the microstructure of fly ash studied by means of XRD and SEM analysis. Thermal stability of crystalline phases was investigated with DTA. Highlight was placed on determination of relationship between mechanically activated fly ash and obtained composites microstructure on one side and behavior of sintered composites on the other side. [Projekat Ministarstva nauke Republike Srbije, br. 172057, 45008 and a project F-198, financed by Serbian Academy of Sciences and Arts]
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Synthesis and sintering of high-temperature composites based on mechanically activated fly ash
SP  - 135
EP  - 146
VL  - 44
IS  - 2
DO  - 10.2298/SOS1202135T
UR  - https://hdl.handle.net/21.15107/rcub_dais_193
ER  - 
@article{
author = "Terzić, Anja and Pavlović, Ljubica and Obradović, Nina and Pavlović, Vladimir B. and Stojanović, J. and Miličić, Lj. and Radojević, Zagorka and Ristić, Momčilo M.",
year = "2012",
abstract = "Amount of fly ash which is and yet to be generated in the coming years highlights the necessity of developing new methods of the recycling where this waste can be reused in significant quantity. A new possibility for fly ash utilization is in high-temperature application (thermal insulators or/and refractory material products). As such, fly ash has to adequately answer the mechanical and thermal stability criteria. One of the ways of achieving it is by applying mechanical activation procedure on fly ash. In present study, fly ashes from two different power plants were mechanically activated in a planetary ball mill. Mechanically treated fly ashes were cemented with two different binders: standard Portland cement and high-aluminates cement. Physico-chemical analysis and investigation of mineralogical components of composites are emphasized, due to the changes occurred in fly ash during mechanical activation and sintering of composites. Macro-performance of the composites was correlated to the microstructure of fly ash studied by means of XRD and SEM analysis. Thermal stability of crystalline phases was investigated with DTA. Highlight was placed on determination of relationship between mechanically activated fly ash and obtained composites microstructure on one side and behavior of sintered composites on the other side. [Projekat Ministarstva nauke Republike Srbije, br. 172057, 45008 and a project F-198, financed by Serbian Academy of Sciences and Arts]",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Synthesis and sintering of high-temperature composites based on mechanically activated fly ash",
pages = "135-146",
volume = "44",
number = "2",
doi = "10.2298/SOS1202135T",
url = "https://hdl.handle.net/21.15107/rcub_dais_193"
}
Terzić, A., Pavlović, L., Obradović, N., Pavlović, V. B., Stojanović, J., Miličić, Lj., Radojević, Z.,& Ristić, M. M.. (2012). Synthesis and sintering of high-temperature composites based on mechanically activated fly ash. in Science of Sintering
Belgrade : International Institute for the Science of Sintering., 44(2), 135-146.
https://doi.org/10.2298/SOS1202135T
https://hdl.handle.net/21.15107/rcub_dais_193
Terzić A, Pavlović L, Obradović N, Pavlović VB, Stojanović J, Miličić L, Radojević Z, Ristić MM. Synthesis and sintering of high-temperature composites based on mechanically activated fly ash. in Science of Sintering. 2012;44(2):135-146.
doi:10.2298/SOS1202135T
https://hdl.handle.net/21.15107/rcub_dais_193 .
Terzić, Anja, Pavlović, Ljubica, Obradović, Nina, Pavlović, Vladimir B., Stojanović, J., Miličić, Lj., Radojević, Zagorka, Ristić, Momčilo M., "Synthesis and sintering of high-temperature composites based on mechanically activated fly ash" in Science of Sintering, 44, no. 2 (2012):135-146,
https://doi.org/10.2298/SOS1202135T .,
https://hdl.handle.net/21.15107/rcub_dais_193 .
10
11
15

Evaluation of Fly Ash Pysico-chemical Characteristics as Component for Eco-ceramic and Sintered Materials

Terzić, Anja; Pavlović, Ljubica; Obradović, Nina; Pavlović, Vladimir B.; Radojević, Zagorka; Miličić, Ljiljana; Aćimović Pavlović, Zagorka

(Belgrade : Serbian Ceramic Society, 2012)

TY  - CONF
AU  - Terzić, Anja
AU  - Pavlović, Ljubica
AU  - Obradović, Nina
AU  - Pavlović, Vladimir B.
AU  - Radojević, Zagorka
AU  - Miličić, Ljiljana
AU  - Aćimović Pavlović, Zagorka
PY  - 2012
UR  - https://dais.sanu.ac.rs/123456789/532
AB  - The aim of the presented study is to evaluate utilization potential of the fly ash which is the main residue from the coal combustion thermal-plants. Decades long high production of fly ash represents extreme hazard for the environment. The storage problem of this waste material is also alerting. Thus, recycling and reapplication of fly ash in construction materials industry is the only economic solution. The well-known examples of fly-ash reapplication as a component in cement, mortar, concrete, bricks and tiles are not enough in means of reusing extreme amounts of this waste material. Therefore, new applications in ash-based composites have to be developed: eco-ceramic materials and sintered materials for refractory performances. In this investigation, characterization of three different fly ash capacities was used as base for further fly ash utilization possibilities analysis. Accent was on the investigation of the fly ash mineralogical and chemical composition. Thermal stability of crystalline phases was investigated with DTA. Macro-performance was correlated with the microstructure of fly ash studied by means of XRD and SEM analysis. Furthermore, content of trace elements, physico-chemical characteristics and leaching toxicity tests were carried out. Comparing the properties of investigated fly ashes with standard values, it could be presumed that fly ash originating from Serbian power plants can be potentially useful for high value products - eco-ceramic and refractory/sintered materials manufacturing. Key words: fly ash, microstructure, potential reusing, eco-ceramic, sintering.
Acknowledgements: This investigation was supported by Serbian Ministry of Science and Education and it was conducted under following projects: 172057 and 45008.
PB  - Belgrade : Serbian Ceramic Society
C3  - The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts
T1  - Evaluation of Fly Ash Pysico-chemical Characteristics as Component for Eco-ceramic and Sintered Materials
SP  - 32
EP  - 32
UR  - https://hdl.handle.net/21.15107/rcub_dais_532
ER  - 
@conference{
author = "Terzić, Anja and Pavlović, Ljubica and Obradović, Nina and Pavlović, Vladimir B. and Radojević, Zagorka and Miličić, Ljiljana and Aćimović Pavlović, Zagorka",
year = "2012",
abstract = "The aim of the presented study is to evaluate utilization potential of the fly ash which is the main residue from the coal combustion thermal-plants. Decades long high production of fly ash represents extreme hazard for the environment. The storage problem of this waste material is also alerting. Thus, recycling and reapplication of fly ash in construction materials industry is the only economic solution. The well-known examples of fly-ash reapplication as a component in cement, mortar, concrete, bricks and tiles are not enough in means of reusing extreme amounts of this waste material. Therefore, new applications in ash-based composites have to be developed: eco-ceramic materials and sintered materials for refractory performances. In this investigation, characterization of three different fly ash capacities was used as base for further fly ash utilization possibilities analysis. Accent was on the investigation of the fly ash mineralogical and chemical composition. Thermal stability of crystalline phases was investigated with DTA. Macro-performance was correlated with the microstructure of fly ash studied by means of XRD and SEM analysis. Furthermore, content of trace elements, physico-chemical characteristics and leaching toxicity tests were carried out. Comparing the properties of investigated fly ashes with standard values, it could be presumed that fly ash originating from Serbian power plants can be potentially useful for high value products - eco-ceramic and refractory/sintered materials manufacturing. Key words: fly ash, microstructure, potential reusing, eco-ceramic, sintering.
Acknowledgements: This investigation was supported by Serbian Ministry of Science and Education and it was conducted under following projects: 172057 and 45008.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts",
title = "Evaluation of Fly Ash Pysico-chemical Characteristics as Component for Eco-ceramic and Sintered Materials",
pages = "32-32",
url = "https://hdl.handle.net/21.15107/rcub_dais_532"
}
Terzić, A., Pavlović, L., Obradović, N., Pavlović, V. B., Radojević, Z., Miličić, L.,& Aćimović Pavlović, Z.. (2012). Evaluation of Fly Ash Pysico-chemical Characteristics as Component for Eco-ceramic and Sintered Materials. in The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts
Belgrade : Serbian Ceramic Society., 32-32.
https://hdl.handle.net/21.15107/rcub_dais_532
Terzić A, Pavlović L, Obradović N, Pavlović VB, Radojević Z, Miličić L, Aćimović Pavlović Z. Evaluation of Fly Ash Pysico-chemical Characteristics as Component for Eco-ceramic and Sintered Materials. in The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts. 2012;:32-32.
https://hdl.handle.net/21.15107/rcub_dais_532 .
Terzić, Anja, Pavlović, Ljubica, Obradović, Nina, Pavlović, Vladimir B., Radojević, Zagorka, Miličić, Ljiljana, Aćimović Pavlović, Zagorka, "Evaluation of Fly Ash Pysico-chemical Characteristics as Component for Eco-ceramic and Sintered Materials" in The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts (2012):32-32,
https://hdl.handle.net/21.15107/rcub_dais_532 .