TY  - JOUR
AU  - Ilić, Biljana
AU  - Mitrović, Aleksandra
AU  - Miličić, Ljiljana
AU  - Zdujić, Miodrag
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4512
AB  - The effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses, Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30–50%), especially when autoclaving curing conditions were applied. © 2018 Elsevier Ltd
PB  - Elsevier
T2  - Construction and Building Materials
T1  - Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins
SP  - 92
EP  - 101
VL  - 178
DO  - 10.1016/j.conbuildmat.2018.05.144
UR  - https://hdl.handle.net/21.15107/rcub_dais_4512
ER  - 

@article{
author = "Ilić, Biljana and Mitrović, Aleksandra and Miličić, Ljiljana and Zdujić, Miodrag",
year = "2018",
abstract = "The effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses, Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30–50%), especially when autoclaving curing conditions were applied. © 2018 Elsevier Ltd",
publisher = "Elsevier",
journal = "Construction and Building Materials",
title = "Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins",
pages = "92-101",
volume = "178",
doi = "10.1016/j.conbuildmat.2018.05.144",
url = "https://hdl.handle.net/21.15107/rcub_dais_4512"
}

Ilić, B., Mitrović, A., Miličić, L.,& Zdujić, M.. (2018). Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins. in Construction and Building Materials
Elsevier., 178, 92-101.
https://doi.org/10.1016/j.conbuildmat.2018.05.144
https://hdl.handle.net/21.15107/rcub_dais_4512

Ilić B, Mitrović A, Miličić L, Zdujić M. Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins. in Construction and Building Materials. 2018;178:92-101.
doi:10.1016/j.conbuildmat.2018.05.144
https://hdl.handle.net/21.15107/rcub_dais_4512 .

Ilić, Biljana, Mitrović, Aleksandra, Miličić, Ljiljana, Zdujić, Miodrag, "Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins" in Construction and Building Materials, 178 (2018):92-101,
https://doi.org/10.1016/j.conbuildmat.2018.05.144 .,
https://hdl.handle.net/21.15107/rcub_dais_4512 .

TY  - JOUR
AU  - Ilić, Biljana
AU  - Mitrović, Aleksandra
AU  - Miličić, Ljiljana
AU  - Zdujić, Miodrag
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/3700
AB  - The effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses, Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30–50%), especially when autoclaving curing conditions were applied. © 2018 Elsevier Ltd
PB  - Elsevier
T2  - Construction and Building Materials
T1  - Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins
SP  - 92
EP  - 101
VL  - 178
DO  - 10.1016/j.conbuildmat.2018.05.144
UR  - https://hdl.handle.net/21.15107/rcub_dais_3700
ER  - 

@article{
author = "Ilić, Biljana and Mitrović, Aleksandra and Miličić, Ljiljana and Zdujić, Miodrag",
year = "2018",
abstract = "The effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses, Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30–50%), especially when autoclaving curing conditions were applied. © 2018 Elsevier Ltd",
publisher = "Elsevier",
journal = "Construction and Building Materials",
title = "Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins",
pages = "92-101",
volume = "178",
doi = "10.1016/j.conbuildmat.2018.05.144",
url = "https://hdl.handle.net/21.15107/rcub_dais_3700"
}

Ilić, B., Mitrović, A., Miličić, L.,& Zdujić, M.. (2018). Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins. in Construction and Building Materials
Elsevier., 178, 92-101.
https://doi.org/10.1016/j.conbuildmat.2018.05.144
https://hdl.handle.net/21.15107/rcub_dais_3700

Ilić B, Mitrović A, Miličić L, Zdujić M. Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins. in Construction and Building Materials. 2018;178:92-101.
doi:10.1016/j.conbuildmat.2018.05.144
https://hdl.handle.net/21.15107/rcub_dais_3700 .

Ilić, Biljana, Mitrović, Aleksandra, Miličić, Ljiljana, Zdujić, Miodrag, "Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins" in Construction and Building Materials, 178 (2018):92-101,
https://doi.org/10.1016/j.conbuildmat.2018.05.144 .,
https://hdl.handle.net/21.15107/rcub_dais_3700 .

TY  - CONF
AU  - Ilić, Biljana
AU  - Mitrović, Aleksandra
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/2376
AB  - Kaolin from a Serbian deposit, having a high content of mica and quartz, disordered kaolinite and a high specific surface area, was used to prepare metakaolin (MK). The calcination at temperatures of 700 °C or 750 °C for 30 to 180 min resulted in MK having high pozzolanic activity, but also significant aglomeration of particles. In order to disperse aglomerates, MK was milled, which resulted in increased pozzolanic activity and reduced particle size. The effects of MK and additionally milled metakaolin (MKmill) on the composite strengths and microstructure of the pastes were compared. We prepared and investigated composites in which ordinary Portland cement (OPC) was replaced with 10% to 50% of MK or MKmill, as well as the representative samples of paste for determination of microstructure.

Compressive strengths higher than the control were obtained for composites having up to 30% of MK and up to 40% of MKmill, respectively. Increase of composite strengths with MKmill was more pronounced at lower cement replacement levels (10% and 20%).

Compressive strength of composites containing agglomerated MK were satisfactory, which suggests that milling of MK, as well as purification of kaolin, may not be necessary.
PB  - Dordrecht : Springer
C3  - Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
T1  - Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin
SP  - 212
EP  - 218
DO  - 10.1007/978-94-024-1207-9_34
UR  - https://hdl.handle.net/21.15107/rcub_dais_2376
ER  - 

@conference{
author = "Ilić, Biljana and Mitrović, Aleksandra and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag",
year = "2018",
abstract = "Kaolin from a Serbian deposit, having a high content of mica and quartz, disordered kaolinite and a high specific surface area, was used to prepare metakaolin (MK). The calcination at temperatures of 700 °C or 750 °C for 30 to 180 min resulted in MK having high pozzolanic activity, but also significant aglomeration of particles. In order to disperse aglomerates, MK was milled, which resulted in increased pozzolanic activity and reduced particle size. The effects of MK and additionally milled metakaolin (MKmill) on the composite strengths and microstructure of the pastes were compared. We prepared and investigated composites in which ordinary Portland cement (OPC) was replaced with 10% to 50% of MK or MKmill, as well as the representative samples of paste for determination of microstructure.

Compressive strengths higher than the control were obtained for composites having up to 30% of MK and up to 40% of MKmill, respectively. Increase of composite strengths with MKmill was more pronounced at lower cement replacement levels (10% and 20%).

Compressive strength of composites containing agglomerated MK were satisfactory, which suggests that milling of MK, as well as purification of kaolin, may not be necessary.",
publisher = "Dordrecht : Springer",
journal = "Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete",
title = "Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin",
pages = "212-218",
doi = "10.1007/978-94-024-1207-9_34",
url = "https://hdl.handle.net/21.15107/rcub_dais_2376"
}

Ilić, B., Mitrović, A., Radonjanin, V., Malešev, M.,& Zdujić, M.. (2018). Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin. in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
Dordrecht : Springer., 212-218.
https://doi.org/10.1007/978-94-024-1207-9_34
https://hdl.handle.net/21.15107/rcub_dais_2376

Ilić B, Mitrović A, Radonjanin V, Malešev M, Zdujić M. Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin. in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete. 2018;:212-218.
doi:10.1007/978-94-024-1207-9_34
https://hdl.handle.net/21.15107/rcub_dais_2376 .

Ilić, Biljana, Mitrović, Aleksandra, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, "Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin" in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete (2018):212-218,
https://doi.org/10.1007/978-94-024-1207-9_34 .,
https://hdl.handle.net/21.15107/rcub_dais_2376 .

TY  - CONF
AU  - Ilić, Biljana
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
AU  - Mitrović, Aleksandra
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/2375
AB  - Environmental concerns and sustainable development require increased replacement of cement. Most of previous studies have shown that the compressive strength of cement-based composites is maximized with a 20% content of metakaolin. We investigated composites prepared by replacing ordinary Portland Cement (OPC) with 30 to 50% of metakaolin (MK) and addition of appropriate amount of hydrated lime, which were ordinary cured for 2, 28 or 90 days. Hydration products and microstructure of the pastes were determined by X-ray diffraction (XRD), differential thermal analysis/thermal gravimetry (DTA/TG) and mercury intrusion porosimetry (MIP). MK was produced by calcination of kaolin from a Serbian deposit, which contained a high level of impurities.

Replacement of OPC with 30% of MK achieved 28 days compressive strength equivalent to that of the control mix. Higher replacement levels, 40% and 50%, combined with the addition of hydrated lime, achieved satisfactory relative strengths of 94% and 87%, respectively. The positive contribution was particularly pronounced after 90 days for a composite containing 50% of MK. The results clearly showed a possibility of obtaining composites having acceptable compressive strength with reduced cement content in accordance with environmental and sustained development requirements.
PB  - Dordrecht : Springer
C3  - Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
T1  - Properties of the cement-based composites with high content of metakaolin
DO  - 10.1007/978-94-024-1207-9_35
UR  - https://hdl.handle.net/21.15107/rcub_dais_2375
ER  - 

@conference{
author = "Ilić, Biljana and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag and Mitrović, Aleksandra",
year = "2018",
abstract = "Environmental concerns and sustainable development require increased replacement of cement. Most of previous studies have shown that the compressive strength of cement-based composites is maximized with a 20% content of metakaolin. We investigated composites prepared by replacing ordinary Portland Cement (OPC) with 30 to 50% of metakaolin (MK) and addition of appropriate amount of hydrated lime, which were ordinary cured for 2, 28 or 90 days. Hydration products and microstructure of the pastes were determined by X-ray diffraction (XRD), differential thermal analysis/thermal gravimetry (DTA/TG) and mercury intrusion porosimetry (MIP). MK was produced by calcination of kaolin from a Serbian deposit, which contained a high level of impurities.

Replacement of OPC with 30% of MK achieved 28 days compressive strength equivalent to that of the control mix. Higher replacement levels, 40% and 50%, combined with the addition of hydrated lime, achieved satisfactory relative strengths of 94% and 87%, respectively. The positive contribution was particularly pronounced after 90 days for a composite containing 50% of MK. The results clearly showed a possibility of obtaining composites having acceptable compressive strength with reduced cement content in accordance with environmental and sustained development requirements.",
publisher = "Dordrecht : Springer",
journal = "Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete",
title = "Properties of the cement-based composites with high content of metakaolin",
doi = "10.1007/978-94-024-1207-9_35",
url = "https://hdl.handle.net/21.15107/rcub_dais_2375"
}

Ilić, B., Radonjanin, V., Malešev, M., Zdujić, M.,& Mitrović, A.. (2018). Properties of the cement-based composites with high content of metakaolin. in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
Dordrecht : Springer..
https://doi.org/10.1007/978-94-024-1207-9_35
https://hdl.handle.net/21.15107/rcub_dais_2375

Ilić B, Radonjanin V, Malešev M, Zdujić M, Mitrović A. Properties of the cement-based composites with high content of metakaolin. in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete. 2018;.
doi:10.1007/978-94-024-1207-9_35
https://hdl.handle.net/21.15107/rcub_dais_2375 .

Ilić, Biljana, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, Mitrović, Aleksandra, "Properties of the cement-based composites with high content of metakaolin" in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete (2018),
https://doi.org/10.1007/978-94-024-1207-9_35 .,
https://hdl.handle.net/21.15107/rcub_dais_2375 .

TY  - JOUR
AU  - Ilić, Biljana
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
AU  - Mitrović, Aleksandra
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/2341
AB  - The effects of thermally (MK) or mechanically activated kaolin (AK) on the compressive strength of mortars and microstructure of pastes were investigated. Mortar mixtures, in which 10%, 20% and 30% of ordinary Portland cement (OPC) was replaced by either MK or AK, were prepared (w/b of 0.5) and ordinary (age 2, 28 or 90 days) and autoclave cured. Hydration products were determined by X-ray diffraction (XRD) and differential thermal analysis/thermal gravimetry (DTA/TG) analysis, while microstructure was investigated by mercury intrusion porosimetry (MIP).

MK substitution increases the compressive strength of ordinary-cured mortars, as a result of the higher content of reactive silica that caused more pronounced pozzolanic reaction, as well as by effective refinement of their pore structure. Positive effects on the compressive strength could be achieved up to 30% substitution of OPC by MK. The OPC substitution by AK resulted in lower strengths of ordinary-cured mortars, compared to both MK mortars and reference. Higher specific surface area and finer particles of AK were insufficient to compensate, through filler effect, lower pozzolanic reaction and additional negative influence of the kaolinite presence. The highest compressive strength was obtained for mortar with 10% of AK (relative strength of 94%).

In comparison to the reference, autoclaved MK and AK mortars, exhibited lower compressive strength, as a consequence of increasing the hydrogarnet formation, instead of tobermorite. The highest strength was achieved for mortar with 10% of AK.
PB  - Elsevier
T2  - Construction and Building Materials
T1  - Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions
SP  - 243
EP  - 252
VL  - 133
DO  - 10.1016/j.conbuildmat.2016.12.068
UR  - https://hdl.handle.net/21.15107/rcub_dais_2341
ER  - 

@article{
author = "Ilić, Biljana and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag and Mitrović, Aleksandra",
year = "2017",
abstract = "The effects of thermally (MK) or mechanically activated kaolin (AK) on the compressive strength of mortars and microstructure of pastes were investigated. Mortar mixtures, in which 10%, 20% and 30% of ordinary Portland cement (OPC) was replaced by either MK or AK, were prepared (w/b of 0.5) and ordinary (age 2, 28 or 90 days) and autoclave cured. Hydration products were determined by X-ray diffraction (XRD) and differential thermal analysis/thermal gravimetry (DTA/TG) analysis, while microstructure was investigated by mercury intrusion porosimetry (MIP).

MK substitution increases the compressive strength of ordinary-cured mortars, as a result of the higher content of reactive silica that caused more pronounced pozzolanic reaction, as well as by effective refinement of their pore structure. Positive effects on the compressive strength could be achieved up to 30% substitution of OPC by MK. The OPC substitution by AK resulted in lower strengths of ordinary-cured mortars, compared to both MK mortars and reference. Higher specific surface area and finer particles of AK were insufficient to compensate, through filler effect, lower pozzolanic reaction and additional negative influence of the kaolinite presence. The highest compressive strength was obtained for mortar with 10% of AK (relative strength of 94%).

In comparison to the reference, autoclaved MK and AK mortars, exhibited lower compressive strength, as a consequence of increasing the hydrogarnet formation, instead of tobermorite. The highest strength was achieved for mortar with 10% of AK.",
publisher = "Elsevier",
journal = "Construction and Building Materials",
title = "Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions",
pages = "243-252",
volume = "133",
doi = "10.1016/j.conbuildmat.2016.12.068",
url = "https://hdl.handle.net/21.15107/rcub_dais_2341"
}

Ilić, B., Radonjanin, V., Malešev, M., Zdujić, M.,& Mitrović, A.. (2017). Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions. in Construction and Building Materials
Elsevier., 133, 243-252.
https://doi.org/10.1016/j.conbuildmat.2016.12.068
https://hdl.handle.net/21.15107/rcub_dais_2341

Ilić B, Radonjanin V, Malešev M, Zdujić M, Mitrović A. Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions. in Construction and Building Materials. 2017;133:243-252.
doi:10.1016/j.conbuildmat.2016.12.068
https://hdl.handle.net/21.15107/rcub_dais_2341 .

Ilić, Biljana, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, Mitrović, Aleksandra, "Study on the addition effect of metakaolin and mechanically activated kaolin on cement strength and microstructure under different curing conditions" in Construction and Building Materials, 133 (2017):243-252,
https://doi.org/10.1016/j.conbuildmat.2016.12.068 .,
https://hdl.handle.net/21.15107/rcub_dais_2341 .

TY  - JOUR
AU  - Ilić, Biljana
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
AU  - Mitrović, Aleksandra
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/15976
AB  - Kaolin from a Serbian deposit, characterized by high content of impurities, such as mica and quartz, disordered kaolinite and high specific surface area, was subjected to thermal and mechanical activation on a large scale. Activations were carried out with a goal to investigate the effects of applied methods on the chemical, structural and morphological changes that occurred in the kaolin, and their influence on the pozzolanic activity. The changes were monitored using XRD, FTIR, TG/DTA, PSD, BET and SEM analyses. Pozzolanic activity was evaluated by determination of the 7-day compressive strength conducted on the lime mortars.

The results showed that mechanical activation by milling the kaolin for 20 h in the conventional horizontal ball mill was competitive for obtaining pozzolana as thermal activation. Pozzolanic activity of thermally activated kaolin was mainly influenced by formation of metakaolin. Combined effects (such as significant specific surface area increase, as well as partial kaolinite and complete mica phase amorphization) were dominant in pozzolanic activity of mechanically activated kaolin.
PB  - Elsevier
T2  - Applied Clay Science
T1  - Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica
SP  - 173
EP  - 181
VL  - 123
DO  - 10.1016/j.clay.2016.01.029
UR  - https://hdl.handle.net/21.15107/rcub_dais_15976
ER  - 

@article{
author = "Ilić, Biljana and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag and Mitrović, Aleksandra",
year = "2016",
abstract = "Kaolin from a Serbian deposit, characterized by high content of impurities, such as mica and quartz, disordered kaolinite and high specific surface area, was subjected to thermal and mechanical activation on a large scale. Activations were carried out with a goal to investigate the effects of applied methods on the chemical, structural and morphological changes that occurred in the kaolin, and their influence on the pozzolanic activity. The changes were monitored using XRD, FTIR, TG/DTA, PSD, BET and SEM analyses. Pozzolanic activity was evaluated by determination of the 7-day compressive strength conducted on the lime mortars.

The results showed that mechanical activation by milling the kaolin for 20 h in the conventional horizontal ball mill was competitive for obtaining pozzolana as thermal activation. Pozzolanic activity of thermally activated kaolin was mainly influenced by formation of metakaolin. Combined effects (such as significant specific surface area increase, as well as partial kaolinite and complete mica phase amorphization) were dominant in pozzolanic activity of mechanically activated kaolin.",
publisher = "Elsevier",
journal = "Applied Clay Science",
title = "Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica",
pages = "173-181",
volume = "123",
doi = "10.1016/j.clay.2016.01.029",
url = "https://hdl.handle.net/21.15107/rcub_dais_15976"
}

Ilić, B., Radonjanin, V., Malešev, M., Zdujić, M.,& Mitrović, A.. (2016). Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica. in Applied Clay Science
Elsevier., 123, 173-181.
https://doi.org/10.1016/j.clay.2016.01.029
https://hdl.handle.net/21.15107/rcub_dais_15976

Ilić B, Radonjanin V, Malešev M, Zdujić M, Mitrović A. Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica. in Applied Clay Science. 2016;123:173-181.
doi:10.1016/j.clay.2016.01.029
https://hdl.handle.net/21.15107/rcub_dais_15976 .

Ilić, Biljana, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, Mitrović, Aleksandra, "Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica" in Applied Clay Science, 123 (2016):173-181,
https://doi.org/10.1016/j.clay.2016.01.029 .,
https://hdl.handle.net/21.15107/rcub_dais_15976 .

TY  - JOUR
AU  - Mitrović, Aleksandra
AU  - Zdujić, Miodrag
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/659
AB  - Batches containing 5 kg of Serbian medium-quality kaolin clay were mechanically treated in a conventional ball mill for 10, 30, 60, 120, 600 and 1200 min of milling time. High reactive pozzolanic addition was obtained as a result of a number of physicochemical changes induced by milling, namely particle size reduction, specific surface area increase, amorphization/dehydroxylation of kaolinite phase and homogenization of clay constituents. The main characteristics of the pozzolanic material obtained after 1200 min of milling were: median particle size of 6.35 μm, specific surface area of 21.75 m2 g− 1, total pore volume of 0.0580 cm3 g− 1, pozzolanic activity (compressive strength) of 14 MPa, and reactive silica content of 33.3 wt.%. Continuous increase of pozzolanic activity, despite the agglomeration of particles that was accompanied with specific surface area decrease when milling time was prolonged, could be explained by kaolinite amorphization as well as the mechanical activation of quartz.
PB  - Elsevier
T2  - International Journal of Mineral Processing
T1  - Preparation of pozzolanic addition by mechanical treatment of kaolin clay
SP  - 59
EP  - 66
VL  - 132
DO  - 10.1016/j.minpro.2014.09.004
UR  - https://hdl.handle.net/21.15107/rcub_dais_659
ER  - 

@article{
author = "Mitrović, Aleksandra and Zdujić, Miodrag",
year = "2014",
abstract = "Batches containing 5 kg of Serbian medium-quality kaolin clay were mechanically treated in a conventional ball mill for 10, 30, 60, 120, 600 and 1200 min of milling time. High reactive pozzolanic addition was obtained as a result of a number of physicochemical changes induced by milling, namely particle size reduction, specific surface area increase, amorphization/dehydroxylation of kaolinite phase and homogenization of clay constituents. The main characteristics of the pozzolanic material obtained after 1200 min of milling were: median particle size of 6.35 μm, specific surface area of 21.75 m2 g− 1, total pore volume of 0.0580 cm3 g− 1, pozzolanic activity (compressive strength) of 14 MPa, and reactive silica content of 33.3 wt.%. Continuous increase of pozzolanic activity, despite the agglomeration of particles that was accompanied with specific surface area decrease when milling time was prolonged, could be explained by kaolinite amorphization as well as the mechanical activation of quartz.",
publisher = "Elsevier",
journal = "International Journal of Mineral Processing",
title = "Preparation of pozzolanic addition by mechanical treatment of kaolin clay",
pages = "59-66",
volume = "132",
doi = "10.1016/j.minpro.2014.09.004",
url = "https://hdl.handle.net/21.15107/rcub_dais_659"
}

Mitrović, A.,& Zdujić, M.. (2014). Preparation of pozzolanic addition by mechanical treatment of kaolin clay. in International Journal of Mineral Processing
Elsevier., 132, 59-66.
https://doi.org/10.1016/j.minpro.2014.09.004
https://hdl.handle.net/21.15107/rcub_dais_659

Mitrović A, Zdujić M. Preparation of pozzolanic addition by mechanical treatment of kaolin clay. in International Journal of Mineral Processing. 2014;132:59-66.
doi:10.1016/j.minpro.2014.09.004
https://hdl.handle.net/21.15107/rcub_dais_659 .

Mitrović, Aleksandra, Zdujić, Miodrag, "Preparation of pozzolanic addition by mechanical treatment of kaolin clay" in International Journal of Mineral Processing, 132 (2014):59-66,
https://doi.org/10.1016/j.minpro.2014.09.004 .,
https://hdl.handle.net/21.15107/rcub_dais_659 .

TY  - JOUR
AU  - Mitrović, Aleksandra
AU  - Zdujić, Miodrag
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/269
AB  - Mechanochemical treatment of Serbian kaolin clay was carried out in a planetary ball mill using two different milling media, hardened steel or zirconia vials and balls. The samples obtained with various milling times were characterized by the particle size laser diffraction (PSLD), X-ray diffraction (XRD), differential scanning calorimetry/thermogravimetry (DTA/TGA) and Fourier-transform infrared (FTIR) analyses. Mechanochemical treatment induced amorphization of the kaolinite phase accompanied by dehydroxylation. It was found that for the given milling parameters, amorphization mainly took place in the milling period up to 15 min, and was completed after about 30 min of milling for both milling media used. The pozzolanic activities were determined by the Chapelle method. Milling in the hardened steel milling medium had no significant influence on pozzolanic activity, even though there was accumulated iron contamination. For both milling media, pozzolanic activity of 0.79 was obtained for the samples milled for 15 min and it remained almost unchanged with prolonged milling. The determined pozzolanic activity values are close to these of commercial metakaolinite or metakaolinite obtained by the calcination of the same clay, therefore, indicating possibility for obtaining high reactive pozzolana by mechanochemical treatment of Serbian kaoline clay. [Projekat Ministarstva nauke Republike Srbije, br. TR 36017 and 45001]
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana
SP  - 579
EP  - 590
VL  - 78
IS  - 4
DO  - 10.2298/JSC120829107M
UR  - https://hdl.handle.net/21.15107/rcub_dais_269
ER  - 

@article{
author = "Mitrović, Aleksandra and Zdujić, Miodrag",
year = "2013",
abstract = "Mechanochemical treatment of Serbian kaolin clay was carried out in a planetary ball mill using two different milling media, hardened steel or zirconia vials and balls. The samples obtained with various milling times were characterized by the particle size laser diffraction (PSLD), X-ray diffraction (XRD), differential scanning calorimetry/thermogravimetry (DTA/TGA) and Fourier-transform infrared (FTIR) analyses. Mechanochemical treatment induced amorphization of the kaolinite phase accompanied by dehydroxylation. It was found that for the given milling parameters, amorphization mainly took place in the milling period up to 15 min, and was completed after about 30 min of milling for both milling media used. The pozzolanic activities were determined by the Chapelle method. Milling in the hardened steel milling medium had no significant influence on pozzolanic activity, even though there was accumulated iron contamination. For both milling media, pozzolanic activity of 0.79 was obtained for the samples milled for 15 min and it remained almost unchanged with prolonged milling. The determined pozzolanic activity values are close to these of commercial metakaolinite or metakaolinite obtained by the calcination of the same clay, therefore, indicating possibility for obtaining high reactive pozzolana by mechanochemical treatment of Serbian kaoline clay. [Projekat Ministarstva nauke Republike Srbije, br. TR 36017 and 45001]",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana",
pages = "579-590",
volume = "78",
number = "4",
doi = "10.2298/JSC120829107M",
url = "https://hdl.handle.net/21.15107/rcub_dais_269"
}

Mitrović, A.,& Zdujić, M.. (2013). Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 78(4), 579-590.
https://doi.org/10.2298/JSC120829107M
https://hdl.handle.net/21.15107/rcub_dais_269

Mitrović A, Zdujić M. Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana. in Journal of the Serbian Chemical Society. 2013;78(4):579-590.
doi:10.2298/JSC120829107M
https://hdl.handle.net/21.15107/rcub_dais_269 .

Mitrović, Aleksandra, Zdujić, Miodrag, "Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana" in Journal of the Serbian Chemical Society, 78, no. 4 (2013):579-590,
https://doi.org/10.2298/JSC120829107M .,
https://hdl.handle.net/21.15107/rcub_dais_269 .

TY  - JOUR
AU  - Milošević, Olivera
AU  - Gagić, Vladimir
AU  - Vodnik, Jože
AU  - Mitrović, Aleksandra
AU  - Karanović, Ljiljana
AU  - Stojanović, Biljana
AU  - Živković, Ljiljana
PY  - 1997
UR  - https://dais.sanu.ac.rs/123456789/12875
AB  - Spray pyrolysis was used for the deposition of well defined submicronic to nanosize particles based on ZnO. The influence of the temperature in the range from 345 to 1165 K, solution concentration (0.004 and 1.5 mol dm(-3)) and the residence time on the particle morphology is discussed. X-ray diffraction, differential scanning calorimetry and scanning electron microscopy were used in particle characterization. With the presumption that certain particle morphology is formed during the evaporation/drying stage of spray pyrolysis, the corresponding mathematical model for droplets evaporation is developed and correlated with the empirical results.
PB  - Elsevier Science Sa, Lausanne
T2  - Thin Solid Films
T1  - Synthesis and deposition of ZnO based particles by aerosol spray pyrolysis
SP  - 44
EP  - 48
VL  - 296
IS  - 1-2
DO  - 10.1016/S0040-6090(96)09358-3
UR  - https://hdl.handle.net/21.15107/rcub_dais_12875
ER  - 

@article{
author = "Milošević, Olivera and Gagić, Vladimir and Vodnik, Jože and Mitrović, Aleksandra and Karanović, Ljiljana and Stojanović, Biljana and Živković, Ljiljana",
year = "1997",
abstract = "Spray pyrolysis was used for the deposition of well defined submicronic to nanosize particles based on ZnO. The influence of the temperature in the range from 345 to 1165 K, solution concentration (0.004 and 1.5 mol dm(-3)) and the residence time on the particle morphology is discussed. X-ray diffraction, differential scanning calorimetry and scanning electron microscopy were used in particle characterization. With the presumption that certain particle morphology is formed during the evaporation/drying stage of spray pyrolysis, the corresponding mathematical model for droplets evaporation is developed and correlated with the empirical results.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Thin Solid Films",
title = "Synthesis and deposition of ZnO based particles by aerosol spray pyrolysis",
pages = "44-48",
volume = "296",
number = "1-2",
doi = "10.1016/S0040-6090(96)09358-3",
url = "https://hdl.handle.net/21.15107/rcub_dais_12875"
}

Milošević, O., Gagić, V., Vodnik, J., Mitrović, A., Karanović, L., Stojanović, B.,& Živković, L.. (1997). Synthesis and deposition of ZnO based particles by aerosol spray pyrolysis. in Thin Solid Films
Elsevier Science Sa, Lausanne., 296(1-2), 44-48.
https://doi.org/10.1016/S0040-6090(96)09358-3
https://hdl.handle.net/21.15107/rcub_dais_12875

Milošević O, Gagić V, Vodnik J, Mitrović A, Karanović L, Stojanović B, Živković L. Synthesis and deposition of ZnO based particles by aerosol spray pyrolysis. in Thin Solid Films. 1997;296(1-2):44-48.
doi:10.1016/S0040-6090(96)09358-3
https://hdl.handle.net/21.15107/rcub_dais_12875 .

Milošević, Olivera, Gagić, Vladimir, Vodnik, Jože, Mitrović, Aleksandra, Karanović, Ljiljana, Stojanović, Biljana, Živković, Ljiljana, "Synthesis and deposition of ZnO based particles by aerosol spray pyrolysis" in Thin Solid Films, 296, no. 1-2 (1997):44-48,
https://doi.org/10.1016/S0040-6090(96)09358-3 .,
https://hdl.handle.net/21.15107/rcub_dais_12875 .