TY  - JOUR
AU  - Galić, Aleksa
AU  - Matić, Tamara
AU  - Obradović, Nataša
AU  - Baščarević, Zvezdana
AU  - Veljović, Đorđe
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7282
AB  - Limited bone bank capacity and risk of infection are some of the main drawbacks of autologous and allogenic grafts, giving rise to synthetic materials for bone tissue implants. The aim of this study was to process and evaluate the mechanical properties and bioactivity of magnesium and strontium doped hydroxyapatite (HAp) scaffolds and investigate the effect of adding zirconium oxide and gelatine coating the scaffolds. Doped nanosized hydroxyapatite powder was synthesized by the hydrothermal method and the scaffolds were made by the foam replica technique and sintered at different temperatures. Yttria-stabilized zirconium oxide (YSZ), synthesized by plasma technology, was used as reinforcement of calcium phosphate scaffolds. Element analysis, phase composition, morphology of the powders and microstructure of the scaffolds were investigated, as well as the compressive strength of the coated and uncoated scaffolds and bioactivity in simulated body fluid (SBF). A microporous structure was achieved with interconnected pores and bioactivity in SBF was confirmed in all cases. The best mechanical properties were given by the coated composite HAp/YSZ scaffolds, withstanding average stresses of over 1019 kPa. These results encourage the idea of use of these scaffolds in bone regenerative therapy and bone tissue engineering.
PB  - International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide
EP  - 479
IS  - 4
SP  - 469
VL  - 55
DO  - 10.2298/SOS220723019G
ER  - 

@article{
author = "Galić, Aleksa and Matić, Tamara and Obradović, Nataša and Baščarević, Zvezdana and Veljović, Đorđe",
year = "2023",
abstract = "Limited bone bank capacity and risk of infection are some of the main drawbacks of autologous and allogenic grafts, giving rise to synthetic materials for bone tissue implants. The aim of this study was to process and evaluate the mechanical properties and bioactivity of magnesium and strontium doped hydroxyapatite (HAp) scaffolds and investigate the effect of adding zirconium oxide and gelatine coating the scaffolds. Doped nanosized hydroxyapatite powder was synthesized by the hydrothermal method and the scaffolds were made by the foam replica technique and sintered at different temperatures. Yttria-stabilized zirconium oxide (YSZ), synthesized by plasma technology, was used as reinforcement of calcium phosphate scaffolds. Element analysis, phase composition, morphology of the powders and microstructure of the scaffolds were investigated, as well as the compressive strength of the coated and uncoated scaffolds and bioactivity in simulated body fluid (SBF). A microporous structure was achieved with interconnected pores and bioactivity in SBF was confirmed in all cases. The best mechanical properties were given by the coated composite HAp/YSZ scaffolds, withstanding average stresses of over 1019 kPa. These results encourage the idea of use of these scaffolds in bone regenerative therapy and bone tissue engineering.",
publisher = "International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide",
pages = "479-469",
number = "4",
volume = "55",
doi = "10.2298/SOS220723019G"
}

Galić, A., Matić, T., Obradović, N., Baščarević, Z.,& Veljović, Đ.. (2023). Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide. in Science of Sintering
International Institute for the Science of Sintering., 55(4), 469-479.
https://doi.org/10.2298/SOS220723019G

Galić A, Matić T, Obradović N, Baščarević Z, Veljović Đ. Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide. in Science of Sintering. 2023;55(4):469-479.
doi:10.2298/SOS220723019G .

Galić, Aleksa, Matić, Tamara, Obradović, Nataša, Baščarević, Zvezdana, Veljović, Đorđe, "Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide" in Science of Sintering, 55, no. 4 (2023):469-479,
https://doi.org/10.2298/SOS220723019G . .

TY  - CONF
AU  - Stanisavljević, Jelena
AU  - Matić, Tamara
AU  - Baščarević, Zvezdana
AU  - Veljović, Đorđe
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6683
PB  - Belgrade : Serbian Chemical Society
PB  - Belgrade : Serbian Young Chemists Club
C3  - Book of abstracts / 8th Conference of the Young Chemists of Serbia, [Belgrade], 29th October
T1  - Development of controlled-porous bioceramic materials based on calcium-phosphate, doped with magnesium, strontium and fluorine ions in the form of inserts
SP  - 86
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6683
ER  - 

@conference{
author = "Stanisavljević, Jelena and Matić, Tamara and Baščarević, Zvezdana and Veljović, Đorđe",
year = "2022",
publisher = "Belgrade : Serbian Chemical Society, Belgrade : Serbian Young Chemists Club",
journal = "Book of abstracts / 8th Conference of the Young Chemists of Serbia, [Belgrade], 29th October",
title = "Development of controlled-porous bioceramic materials based on calcium-phosphate, doped with magnesium, strontium and fluorine ions in the form of inserts",
pages = "86",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6683"
}

Stanisavljević, J., Matić, T., Baščarević, Z.,& Veljović, Đ.. (2022). Development of controlled-porous bioceramic materials based on calcium-phosphate, doped with magnesium, strontium and fluorine ions in the form of inserts. in Book of abstracts / 8th Conference of the Young Chemists of Serbia, [Belgrade], 29th October
Belgrade : Serbian Chemical Society., 86.
https://hdl.handle.net/21.15107/rcub_technorep_6683

Stanisavljević J, Matić T, Baščarević Z, Veljović Đ. Development of controlled-porous bioceramic materials based on calcium-phosphate, doped with magnesium, strontium and fluorine ions in the form of inserts. in Book of abstracts / 8th Conference of the Young Chemists of Serbia, [Belgrade], 29th October. 2022;:86.
https://hdl.handle.net/21.15107/rcub_technorep_6683 .

Stanisavljević, Jelena, Matić, Tamara, Baščarević, Zvezdana, Veljović, Đorđe, "Development of controlled-porous bioceramic materials based on calcium-phosphate, doped with magnesium, strontium and fluorine ions in the form of inserts" in Book of abstracts / 8th Conference of the Young Chemists of Serbia, [Belgrade], 29th October (2022):86,
https://hdl.handle.net/21.15107/rcub_technorep_6683 .

TY  - CONF
AU  - Stanisavljević, Jelena
AU  - Matić, Tamara
AU  - Baščarević, Zvezdana
AU  - Veljović, Đorđe
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6676
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Twentieth Young Researchers' Conference Materials Science and Engineering, November 30 – December 2, 2022, Belgrade, Serbia
T1  - Synthesis and characterization of dental inserts based on calcium-phosphate, doped with magnesium, strontium and fluorine ions
SP  - 2
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6676
ER  - 

@conference{
author = "Stanisavljević, Jelena and Matić, Tamara and Baščarević, Zvezdana and Veljović, Đorđe",
year = "2022",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Twentieth Young Researchers' Conference Materials Science and Engineering, November 30 – December 2, 2022, Belgrade, Serbia",
title = "Synthesis and characterization of dental inserts based on calcium-phosphate, doped with magnesium, strontium and fluorine ions",
pages = "2",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6676"
}

Stanisavljević, J., Matić, T., Baščarević, Z.,& Veljović, Đ.. (2022). Synthesis and characterization of dental inserts based on calcium-phosphate, doped with magnesium, strontium and fluorine ions. in Program and the Book of Abstracts / Twentieth Young Researchers' Conference Materials Science and Engineering, November 30 – December 2, 2022, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 2.
https://hdl.handle.net/21.15107/rcub_technorep_6676

Stanisavljević J, Matić T, Baščarević Z, Veljović Đ. Synthesis and characterization of dental inserts based on calcium-phosphate, doped with magnesium, strontium and fluorine ions. in Program and the Book of Abstracts / Twentieth Young Researchers' Conference Materials Science and Engineering, November 30 – December 2, 2022, Belgrade, Serbia. 2022;:2.
https://hdl.handle.net/21.15107/rcub_technorep_6676 .

Stanisavljević, Jelena, Matić, Tamara, Baščarević, Zvezdana, Veljović, Đorđe, "Synthesis and characterization of dental inserts based on calcium-phosphate, doped with magnesium, strontium and fluorine ions" in Program and the Book of Abstracts / Twentieth Young Researchers' Conference Materials Science and Engineering, November 30 – December 2, 2022, Belgrade, Serbia (2022):2,
https://hdl.handle.net/21.15107/rcub_technorep_6676 .

TY  - JOUR
AU  - Nikolić, Nebojša D.
AU  - Živković, Predrag M.
AU  - Pavlović, Miomir
AU  - Baščarević, Zvezdana
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5905
AB  - The morphologies of copper dendritic forms obtained in both potentiostatic and galvanostatic regimes of electrolysis with various amounts of the electricity were analyzed by the scanning electron microscopy (SEM) technique. Irrespective of amount of passed electricity, 3D (three dimensional) pine-like dendrites with sharp tips were formed in the potentiostatic regime of electrolysis. On the other hand, the amount of passed electricity had a strong effect on the shape of the 3D pine-like dendrites formed in the galvanostatic regime of electrolysis. Dendrites with sharp tips were formed with smaller amount of passed electricity, while dendrites with globular tips were formed with larger amounts. The change in the shape of the galvanostatically synthesized 3D pine-like dendrites was explained by comparison with copper deposits obtained potentiostatically at overpotentials that corresponded to the final overpotentials during galvanostatic regime of electrolysis for the analyzed amounts of electricity. Based on the similarity of the obtained morphologies at the macro level, it was concluded that the overpotential plays a crucial role in the formation of the electrolytically synthesized dendrites and that the controlled conditions of electrolysis could represent a suitable way for a synthesis of spherical Cu particles by electrolysis.
AB  - Морфологије дендритичних форми бакра добијене потенциостатским и галваностатским режимима електролизе са различитим количинама наелектрисања су биле анализиране техником скенирајуће електронске микроскопије (СЕМ). Без обзира на количину пропуштеног наелектрисања, 3D (тродимензионални) дендрити налик стаблубора са оштрим врховима су били формирани потенциостатским режимом електролизе. На другој страни, количина пропуштеног наелектрисања је имала строг утицај на облик3D дендрита налик бору формираних галваностатским режимом електролизе. Дендритиса оштрим врховима су били формирани са мањом, док дендрити чији врхови су глобуле су били формирани са већом количином пропуштеног наелектрисања. Промена облика галваностатски синтетизованих 3D дендрита налик бору је била објашњена поређењем са потенциостатски добијеним талозима бакра на пренапетостима које су одговарале крајњим пренапетостима током галваностатског режима електролизе за анализиране количине наелектрисања. На основу сличности њихових морфологија на макро нивоу, закључено је да пренапетост игра пресудну улогу на облик електролитички синтетизованих дендрита, и да контролисани услови електролизе представљају погодан начин за синтезу сферичних честица бакра поступком електролизе-
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Overpotential controls the morphology of electrolytically produced copper dendritic forms
T1  - Пренапетост контролише морфологију електролитички произведених дендритичних форми бакра
EP  - 1220
IS  - 11
SP  - 1209
VL  - 84
DO  - 10.2298/JSC190522066N
ER  - 

@article{
author = "Nikolić, Nebojša D. and Živković, Predrag M. and Pavlović, Miomir and Baščarević, Zvezdana",
year = "2019",
abstract = "The morphologies of copper dendritic forms obtained in both potentiostatic and galvanostatic regimes of electrolysis with various amounts of the electricity were analyzed by the scanning electron microscopy (SEM) technique. Irrespective of amount of passed electricity, 3D (three dimensional) pine-like dendrites with sharp tips were formed in the potentiostatic regime of electrolysis. On the other hand, the amount of passed electricity had a strong effect on the shape of the 3D pine-like dendrites formed in the galvanostatic regime of electrolysis. Dendrites with sharp tips were formed with smaller amount of passed electricity, while dendrites with globular tips were formed with larger amounts. The change in the shape of the galvanostatically synthesized 3D pine-like dendrites was explained by comparison with copper deposits obtained potentiostatically at overpotentials that corresponded to the final overpotentials during galvanostatic regime of electrolysis for the analyzed amounts of electricity. Based on the similarity of the obtained morphologies at the macro level, it was concluded that the overpotential plays a crucial role in the formation of the electrolytically synthesized dendrites and that the controlled conditions of electrolysis could represent a suitable way for a synthesis of spherical Cu particles by electrolysis., Морфологије дендритичних форми бакра добијене потенциостатским и галваностатским режимима електролизе са различитим количинама наелектрисања су биле анализиране техником скенирајуће електронске микроскопије (СЕМ). Без обзира на количину пропуштеног наелектрисања, 3D (тродимензионални) дендрити налик стаблубора са оштрим врховима су били формирани потенциостатским режимом електролизе. На другој страни, количина пропуштеног наелектрисања је имала строг утицај на облик3D дендрита налик бору формираних галваностатским режимом електролизе. Дендритиса оштрим врховима су били формирани са мањом, док дендрити чији врхови су глобуле су били формирани са већом количином пропуштеног наелектрисања. Промена облика галваностатски синтетизованих 3D дендрита налик бору је била објашњена поређењем са потенциостатски добијеним талозима бакра на пренапетостима које су одговарале крајњим пренапетостима током галваностатског режима електролизе за анализиране количине наелектрисања. На основу сличности њихових морфологија на макро нивоу, закључено је да пренапетост игра пресудну улогу на облик електролитички синтетизованих дендрита, и да контролисани услови електролизе представљају погодан начин за синтезу сферичних честица бакра поступком електролизе-",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Overpotential controls the morphology of electrolytically produced copper dendritic forms, Пренапетост контролише морфологију електролитички произведених дендритичних форми бакра",
pages = "1220-1209",
number = "11",
volume = "84",
doi = "10.2298/JSC190522066N"
}

Nikolić, N. D., Živković, P. M., Pavlović, M.,& Baščarević, Z.. (2019). Overpotential controls the morphology of electrolytically produced copper dendritic forms. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 84(11), 1209-1220.
https://doi.org/10.2298/JSC190522066N

Nikolić ND, Živković PM, Pavlović M, Baščarević Z. Overpotential controls the morphology of electrolytically produced copper dendritic forms. in Journal of the Serbian Chemical Society. 2019;84(11):1209-1220.
doi:10.2298/JSC190522066N .

Nikolić, Nebojša D., Živković, Predrag M., Pavlović, Miomir, Baščarević, Zvezdana, "Overpotential controls the morphology of electrolytically produced copper dendritic forms" in Journal of the Serbian Chemical Society, 84, no. 11 (2019):1209-1220,
https://doi.org/10.2298/JSC190522066N . .

TY  - JOUR
AU  - Baščarević, Zvezdana
AU  - Komljenović, Miroslav
AU  - Miladinović, Zoran P.
AU  - Nikolić, Violeta
AU  - Marjanović, Nataša
AU  - Petrović, Rada
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3039
AB  - In this paper, geopolymers based on two different fly ash samples were exposed to sodium sulfate (Na2SO4) solution (50 g/l) over a period of 365 days. It was found that sulfate solution attack caused a small decrease in strength of geopolymer mortars. Analysis of the Na2SO4 solutions by optical emission spectroscopy indicated that exposing of the geopolymer samples to the Na2SO4 solution had caused leaching of one of the elements of the aluminosilicate gel, silicon. Mineralogical analyses of geopolymer samples did not show formation of any new phases due to a reaction with sulfate ions. Changes in aluminosilicate geopolymer gel due to sulfate attack were investigated by electron microscopy and nuclear magnetic resonance. It was found that treatment of geopolymer samples with the sulfate solution caused breaking of -Si-O-Si- bonds in aluminosilicate gel structure. Breaking of the -Si-O-Si- bonds and leaching of Si were consequences of the increase in the pH value of sulfate solution during testing.
PB  - Springer, Dordrecht
T2  - Materials and Structures
T1  - Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers
EP  - 697
IS  - 3
SP  - 683
VL  - 48
DO  - 10.1617/s11527-014-0325-4
ER  - 

@article{
author = "Baščarević, Zvezdana and Komljenović, Miroslav and Miladinović, Zoran P. and Nikolić, Violeta and Marjanović, Nataša and Petrović, Rada",
year = "2015",
abstract = "In this paper, geopolymers based on two different fly ash samples were exposed to sodium sulfate (Na2SO4) solution (50 g/l) over a period of 365 days. It was found that sulfate solution attack caused a small decrease in strength of geopolymer mortars. Analysis of the Na2SO4 solutions by optical emission spectroscopy indicated that exposing of the geopolymer samples to the Na2SO4 solution had caused leaching of one of the elements of the aluminosilicate gel, silicon. Mineralogical analyses of geopolymer samples did not show formation of any new phases due to a reaction with sulfate ions. Changes in aluminosilicate geopolymer gel due to sulfate attack were investigated by electron microscopy and nuclear magnetic resonance. It was found that treatment of geopolymer samples with the sulfate solution caused breaking of -Si-O-Si- bonds in aluminosilicate gel structure. Breaking of the -Si-O-Si- bonds and leaching of Si were consequences of the increase in the pH value of sulfate solution during testing.",
publisher = "Springer, Dordrecht",
journal = "Materials and Structures",
title = "Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers",
pages = "697-683",
number = "3",
volume = "48",
doi = "10.1617/s11527-014-0325-4"
}

Baščarević, Z., Komljenović, M., Miladinović, Z. P., Nikolić, V., Marjanović, N.,& Petrović, R.. (2015). Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers. in Materials and Structures
Springer, Dordrecht., 48(3), 683-697.
https://doi.org/10.1617/s11527-014-0325-4

Baščarević Z, Komljenović M, Miladinović ZP, Nikolić V, Marjanović N, Petrović R. Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers. in Materials and Structures. 2015;48(3):683-697.
doi:10.1617/s11527-014-0325-4 .

Baščarević, Zvezdana, Komljenović, Miroslav, Miladinović, Zoran P., Nikolić, Violeta, Marjanović, Nataša, Petrović, Rada, "Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers" in Materials and Structures, 48, no. 3 (2015):683-697,
https://doi.org/10.1617/s11527-014-0325-4 . .

TY  - JOUR
AU  - Marjanović, Nataša
AU  - Komljenović, Miroslav
AU  - Baščarević, Zvezdana
AU  - Nikolić, V.
AU  - Petrović, Rada
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3020
AB  - This paper investigated physical mechanical and microstructural properties of alkali-activated binders based on blends of fly ash (FA) and blast furnace slag (BFS). FA BFS blends were alkali-activated with sodium silicate (water glass) solution. The synthesis of alkali-activated binders was conducted at 95 C during 24 h, with different FA BFS mass ratios (100:0; 75:25; 50:50; 25:75; 0:100), different moduli of alkali activator (SiO2/Na2O: 0.5; 1.0; 1.5) and different alkali activator concentration (% Na2O: 4; 7; 10). The influence of alkali activation conditions on the flexural and compressive strengths, setting time, drying shrinkage and the microstructure of synthesized binders was investigated. It was found that the compressive strength mostly depended on the composition of the FA BFS blends and the water/binder ratio. The setting time highly depended on the activator concentration, while the drying shrinkage was mostly affected by the curing temperature. The blend comprising FA 25% BFS 75%, activated with the activator of modulus 1.0 and the activator concentration of 10% Na2O yielded optimal mortar regarding investigated physical mechanical characteristics. Microstuctural examination showed that the chemical composition of the binding phase varied as a function of the blend composition. Predominance of FA alkali reaction products in the binding phase positively influenced the flexural strength, while the predominance of BFS alkali reaction products positively affected the compressive strength. Optimal characteristics of alkaliactivated binder were related to the following chemical composition of the binding gel: Ca/Si= 0.34-0.50, Al/Si=0.15-0.24, Mg/Si= 0.07-0.16 and Na/Si=0.21-0.37. Empirical values of optimal gel composition could serve as a basis for tailoring the properties of alkali-activated binders based on different industrial waste precursor material.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Physical-mechanical and microstructural properties of alkali-activated fly ash-blast furnace slag blends
EP  - 1435
IS  - 1
SP  - 1421
VL  - 41
DO  - 10.1016/j.ceramint.2014.09.075
ER  - 

@article{
author = "Marjanović, Nataša and Komljenović, Miroslav and Baščarević, Zvezdana and Nikolić, V. and Petrović, Rada",
year = "2015",
abstract = "This paper investigated physical mechanical and microstructural properties of alkali-activated binders based on blends of fly ash (FA) and blast furnace slag (BFS). FA BFS blends were alkali-activated with sodium silicate (water glass) solution. The synthesis of alkali-activated binders was conducted at 95 C during 24 h, with different FA BFS mass ratios (100:0; 75:25; 50:50; 25:75; 0:100), different moduli of alkali activator (SiO2/Na2O: 0.5; 1.0; 1.5) and different alkali activator concentration (% Na2O: 4; 7; 10). The influence of alkali activation conditions on the flexural and compressive strengths, setting time, drying shrinkage and the microstructure of synthesized binders was investigated. It was found that the compressive strength mostly depended on the composition of the FA BFS blends and the water/binder ratio. The setting time highly depended on the activator concentration, while the drying shrinkage was mostly affected by the curing temperature. The blend comprising FA 25% BFS 75%, activated with the activator of modulus 1.0 and the activator concentration of 10% Na2O yielded optimal mortar regarding investigated physical mechanical characteristics. Microstuctural examination showed that the chemical composition of the binding phase varied as a function of the blend composition. Predominance of FA alkali reaction products in the binding phase positively influenced the flexural strength, while the predominance of BFS alkali reaction products positively affected the compressive strength. Optimal characteristics of alkaliactivated binder were related to the following chemical composition of the binding gel: Ca/Si= 0.34-0.50, Al/Si=0.15-0.24, Mg/Si= 0.07-0.16 and Na/Si=0.21-0.37. Empirical values of optimal gel composition could serve as a basis for tailoring the properties of alkali-activated binders based on different industrial waste precursor material.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Physical-mechanical and microstructural properties of alkali-activated fly ash-blast furnace slag blends",
pages = "1435-1421",
number = "1",
volume = "41",
doi = "10.1016/j.ceramint.2014.09.075"
}

Marjanović, N., Komljenović, M., Baščarević, Z., Nikolić, V.,& Petrović, R.. (2015). Physical-mechanical and microstructural properties of alkali-activated fly ash-blast furnace slag blends. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(1), 1421-1435.
https://doi.org/10.1016/j.ceramint.2014.09.075

Marjanović N, Komljenović M, Baščarević Z, Nikolić V, Petrović R. Physical-mechanical and microstructural properties of alkali-activated fly ash-blast furnace slag blends. in Ceramics International. 2015;41(1):1421-1435.
doi:10.1016/j.ceramint.2014.09.075 .

Marjanović, Nataša, Komljenović, Miroslav, Baščarević, Zvezdana, Nikolić, V., Petrović, Rada, "Physical-mechanical and microstructural properties of alkali-activated fly ash-blast furnace slag blends" in Ceramics International, 41, no. 1 (2015):1421-1435,
https://doi.org/10.1016/j.ceramint.2014.09.075 . .

TY  - JOUR
AU  - Nikolić, Violeta
AU  - Komljenović, Miroslav
AU  - Baščarević, Zvezdana
AU  - Marjanović, Nataša
AU  - Miladinović, Zoran P.
AU  - Petrović, Rada
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2963
AB  - Reactivity of Class F fly ash (FA), development of strength, and structure of FA-based geopolymers, depending on the reaction conditions, were examined in this paper. The results of SEM/EDS and NMR analyses revealed that the composition of aluminosilicate gel changed during reaction, i.e. Si/Al atomic ratio decreased with the reaction time. Higher strength of geopolymers was associated with a higher fraction of aluminum rich structural units, higher crosslinking, and more compact structure. A rapid test for the assessment of FA reactivity and thus the applicability of FA for geopolymer synthesis was proposed.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - The influence of fly ash characteristics and reaction conditions on strength and structure of geopolymers
EP  - 370
SP  - 361
VL  - 94
DO  - 10.1016/j.conbuildmat.2015.07.014
ER  - 

@article{
author = "Nikolić, Violeta and Komljenović, Miroslav and Baščarević, Zvezdana and Marjanović, Nataša and Miladinović, Zoran P. and Petrović, Rada",
year = "2015",
abstract = "Reactivity of Class F fly ash (FA), development of strength, and structure of FA-based geopolymers, depending on the reaction conditions, were examined in this paper. The results of SEM/EDS and NMR analyses revealed that the composition of aluminosilicate gel changed during reaction, i.e. Si/Al atomic ratio decreased with the reaction time. Higher strength of geopolymers was associated with a higher fraction of aluminum rich structural units, higher crosslinking, and more compact structure. A rapid test for the assessment of FA reactivity and thus the applicability of FA for geopolymer synthesis was proposed.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "The influence of fly ash characteristics and reaction conditions on strength and structure of geopolymers",
pages = "370-361",
volume = "94",
doi = "10.1016/j.conbuildmat.2015.07.014"
}

Nikolić, V., Komljenović, M., Baščarević, Z., Marjanović, N., Miladinović, Z. P.,& Petrović, R.. (2015). The influence of fly ash characteristics and reaction conditions on strength and structure of geopolymers. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 94, 361-370.
https://doi.org/10.1016/j.conbuildmat.2015.07.014

Nikolić V, Komljenović M, Baščarević Z, Marjanović N, Miladinović ZP, Petrović R. The influence of fly ash characteristics and reaction conditions on strength and structure of geopolymers. in Construction and Building Materials. 2015;94:361-370.
doi:10.1016/j.conbuildmat.2015.07.014 .

Nikolić, Violeta, Komljenović, Miroslav, Baščarević, Zvezdana, Marjanović, Nataša, Miladinović, Zoran P., Petrović, Rada, "The influence of fly ash characteristics and reaction conditions on strength and structure of geopolymers" in Construction and Building Materials, 94 (2015):361-370,
https://doi.org/10.1016/j.conbuildmat.2015.07.014 . .

TY  - JOUR
AU  - Nikolić, Violeta
AU  - Komljenović, Miroslav
AU  - Marjanović, Nataša
AU  - Baščarević, Zvezdana
AU  - Petrović, Rada
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2785
AB  - In this paper, the effectiveness of geopolymers based on initial and mechanically activated fly ash in immobilization of lead was investigated. Fly ash (FA) was firstly mechanically and then alkali activated at room temperature. The immobilization process was assessed by the means of the mechanical and leaching properties of geopolymers. The results indicated that the geopolymers based on mechanically activated FA were more effective in the immobilization of lead compared to the geopolymers based on the initial FA. Mechanical activation of FA led to a significant increase in strength and reduced Pb leaching from geopolymers. Higher effectiveness of Pb immobilization was the result of reduced porosity, i.e. higher compactness of geopolymers based on mechanically activated FA.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Lead immobilization by geopolymers based on mechanically activated fly ash
EP  - 8488
IS  - 6
SP  - 8479
VL  - 40
DO  - 10.1016/j.ceramint.2014.01.059
ER  - 

@article{
author = "Nikolić, Violeta and Komljenović, Miroslav and Marjanović, Nataša and Baščarević, Zvezdana and Petrović, Rada",
year = "2014",
abstract = "In this paper, the effectiveness of geopolymers based on initial and mechanically activated fly ash in immobilization of lead was investigated. Fly ash (FA) was firstly mechanically and then alkali activated at room temperature. The immobilization process was assessed by the means of the mechanical and leaching properties of geopolymers. The results indicated that the geopolymers based on mechanically activated FA were more effective in the immobilization of lead compared to the geopolymers based on the initial FA. Mechanical activation of FA led to a significant increase in strength and reduced Pb leaching from geopolymers. Higher effectiveness of Pb immobilization was the result of reduced porosity, i.e. higher compactness of geopolymers based on mechanically activated FA.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Lead immobilization by geopolymers based on mechanically activated fly ash",
pages = "8488-8479",
number = "6",
volume = "40",
doi = "10.1016/j.ceramint.2014.01.059"
}

Nikolić, V., Komljenović, M., Marjanović, N., Baščarević, Z.,& Petrović, R.. (2014). Lead immobilization by geopolymers based on mechanically activated fly ash. in Ceramics International
Elsevier Sci Ltd, Oxford., 40(6), 8479-8488.
https://doi.org/10.1016/j.ceramint.2014.01.059

Nikolić V, Komljenović M, Marjanović N, Baščarević Z, Petrović R. Lead immobilization by geopolymers based on mechanically activated fly ash. in Ceramics International. 2014;40(6):8479-8488.
doi:10.1016/j.ceramint.2014.01.059 .

Nikolić, Violeta, Komljenović, Miroslav, Marjanović, Nataša, Baščarević, Zvezdana, Petrović, Rada, "Lead immobilization by geopolymers based on mechanically activated fly ash" in Ceramics International, 40, no. 6 (2014):8479-8488,
https://doi.org/10.1016/j.ceramint.2014.01.059 . .

TY  - JOUR
AU  - Baščarević, Zvezdana
AU  - Komljenović, Miroslav
AU  - Miladinović, Zoran P.
AU  - Nikolić, Violeta
AU  - Marjanović, Nataša
AU  - Zujović, Zoran
AU  - Petrović, Rada
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2521
AB  - The geopolymers based on fly ash were exposed to the concentrated (6 M) NH4NO3 solution for 540 days. The highest compressive strength decrease occurred in the initial 28 days testing period. Study of the effects of the NH4NO3 solution on the geopolymer structure indicated leaching of alkali and alkaline earth cations and breaking of -Si-O-Al- bonds in aluminosilicate gel. The reduction of compressive strength of the geopolymers was associated with the structural defects in the aluminosilicate gel created by breaking of -Si-O-Al- bonds. Subsequent fluctuation in compressive strength was a result of the structural defects reparation by silicon.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - Effects of the concentrated NH4NO3 solution on mechanical properties and structure of the fly ash based geopolymers
EP  - 579
SP  - 570
VL  - 41
DO  - 10.1016/j.conbuildmat.2012.12.067
ER  - 

@article{
author = "Baščarević, Zvezdana and Komljenović, Miroslav and Miladinović, Zoran P. and Nikolić, Violeta and Marjanović, Nataša and Zujović, Zoran and Petrović, Rada",
year = "2013",
abstract = "The geopolymers based on fly ash were exposed to the concentrated (6 M) NH4NO3 solution for 540 days. The highest compressive strength decrease occurred in the initial 28 days testing period. Study of the effects of the NH4NO3 solution on the geopolymer structure indicated leaching of alkali and alkaline earth cations and breaking of -Si-O-Al- bonds in aluminosilicate gel. The reduction of compressive strength of the geopolymers was associated with the structural defects in the aluminosilicate gel created by breaking of -Si-O-Al- bonds. Subsequent fluctuation in compressive strength was a result of the structural defects reparation by silicon.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "Effects of the concentrated NH4NO3 solution on mechanical properties and structure of the fly ash based geopolymers",
pages = "579-570",
volume = "41",
doi = "10.1016/j.conbuildmat.2012.12.067"
}

Baščarević, Z., Komljenović, M., Miladinović, Z. P., Nikolić, V., Marjanović, N., Zujović, Z.,& Petrović, R.. (2013). Effects of the concentrated NH4NO3 solution on mechanical properties and structure of the fly ash based geopolymers. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 41, 570-579.
https://doi.org/10.1016/j.conbuildmat.2012.12.067

Baščarević Z, Komljenović M, Miladinović ZP, Nikolić V, Marjanović N, Zujović Z, Petrović R. Effects of the concentrated NH4NO3 solution on mechanical properties and structure of the fly ash based geopolymers. in Construction and Building Materials. 2013;41:570-579.
doi:10.1016/j.conbuildmat.2012.12.067 .

Baščarević, Zvezdana, Komljenović, Miroslav, Miladinović, Zoran P., Nikolić, Violeta, Marjanović, Nataša, Zujović, Zoran, Petrović, Rada, "Effects of the concentrated NH4NO3 solution on mechanical properties and structure of the fly ash based geopolymers" in Construction and Building Materials, 41 (2013):570-579,
https://doi.org/10.1016/j.conbuildmat.2012.12.067 . .