TY  - CONF
AU  - Nikolić, Violeta
AU  - Džunuzović, Nataša
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2424
AB  - This paper investigates the influence of mechanical activation of different
types of fly ash on the properties of alternative binders – geopolymers based on
alkali activated fly ash. Fly ash was firstly mechanically and then alkali-acti-
vated. Mechanical activation of fly ash was conducted in a planetary ball mill.
Alkali activation of fly ash was carried out at room temperature by use of so-
dium silicate solution as an activator. Structural changes of geopolymers were
assessed by SEM and EDS analysis. Mechanical activation of fly ash led to a
significant increase in strength of these alternative binders, thereby expanding
their potential application, such as soil stabilization.
PB  - University „Union-Nikola Tesla”, Belgrade, Serbia
C3  - The Third international conference on sustainable environment and technologies “Create sustainable community”, Belgrade, 22-23 september 2023.
T1  - IMPROVED PROPERTIES OF ALTERNATIVE BINDERS AND THEIR POTENTIAL APPLICATION FOR SOIL STABILIZATION
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2424
ER  - 

@conference{
author = "Nikolić, Violeta and Džunuzović, Nataša",
year = "2023",
abstract = "This paper investigates the influence of mechanical activation of different
types of fly ash on the properties of alternative binders – geopolymers based on
alkali activated fly ash. Fly ash was firstly mechanically and then alkali-acti-
vated. Mechanical activation of fly ash was conducted in a planetary ball mill.
Alkali activation of fly ash was carried out at room temperature by use of so-
dium silicate solution as an activator. Structural changes of geopolymers were
assessed by SEM and EDS analysis. Mechanical activation of fly ash led to a
significant increase in strength of these alternative binders, thereby expanding
their potential application, such as soil stabilization.",
publisher = "University „Union-Nikola Tesla”, Belgrade, Serbia",
journal = "The Third international conference on sustainable environment and technologies “Create sustainable community”, Belgrade, 22-23 september 2023.",
title = "IMPROVED PROPERTIES OF ALTERNATIVE BINDERS AND THEIR POTENTIAL APPLICATION FOR SOIL STABILIZATION",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2424"
}

Nikolić, V.,& Džunuzović, N.. (2023). IMPROVED PROPERTIES OF ALTERNATIVE BINDERS AND THEIR POTENTIAL APPLICATION FOR SOIL STABILIZATION. in The Third international conference on sustainable environment and technologies “Create sustainable community”, Belgrade, 22-23 september 2023.
University „Union-Nikola Tesla”, Belgrade, Serbia..
https://hdl.handle.net/21.15107/rcub_rimsi_2424

Nikolić V, Džunuzović N. IMPROVED PROPERTIES OF ALTERNATIVE BINDERS AND THEIR POTENTIAL APPLICATION FOR SOIL STABILIZATION. in The Third international conference on sustainable environment and technologies “Create sustainable community”, Belgrade, 22-23 september 2023.. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2424 .

Nikolić, Violeta, Džunuzović, Nataša, "IMPROVED PROPERTIES OF ALTERNATIVE BINDERS AND THEIR POTENTIAL APPLICATION FOR SOIL STABILIZATION" in The Third international conference on sustainable environment and technologies “Create sustainable community”, Belgrade, 22-23 september 2023. (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2424 .

TY  - CONF
AU  - Džunuzović, Nataša
AU  - Komljenović, Miroslav M
AU  - Nikolić, Violeta
AU  - Baščarević, Zvezdana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2439
AB  - Over the past few decades a new group of binding materials, geopolymers, have
emerged as an alternative to traditional binding materials such as Portland cement.
Geopolymers are obtained by the process of alkali activation of various alumino-
silicate materials, both natural and synthetic. Of particular importance is the
possibility of alkali activation of the industrial waste material such as fly ash. Fly
ash (FA) is generated in the process of coal combustion in thermal power plants. In
Serbia a small part of fly ash is recycled while the rest is landfilled, causing a
serious environmental pollution. Alkali activation represents a process by which fly
ash can safely be converted into a useful biding material, suitable for the
construction purposes. Geopolymers (or alkali-activated materials) based on fly ash
are known for their good compressive strength and good durability in aggressive
environments, when propeerly designed. However, the limiting factor for wider use
of fly ash in the process of alkali activation and geopolymers synthesis is its low
reactivity and consequent low compressive strength of binding elements. Our
research has shown that the reactivity of fly ash in the process of alkali activation
can be enhanced by the appropriate choice of the reaction conditions – by
mechanical activation of fly ash and by blending with more reactive material such as
blast furnace slag (BFS). Both options were explored in this paper and comparison
was performed. Mechanical activation of fly ash was conducted in a planetary ball
mill, while blends of fly ash and blast furnace slag were prepared with different
ratios (FA/(FA+BFS) = 1; 0,75; 0,50; 0,25; 0). Alkali activation was carried out at
95ºC by use of sodium silicate solution as an activator. In both cases significant
increase of geopolymer compressive strength was observed in respect to the
geopolymer based on the initial fly ash. Optimal geopolymer strength was correlated
with the chemical composition of the binding gel. Empirical values of optimal gel
composition could serve as a basis for tailoring properties of alkali-activated binders
based on different precursors. Both alkali-activated systems represent promissing
routes for geopolymer technology development.
PB  - Institut za multidisciplinarna istraņivanja Kneza Vińeslava 1, 11000 Belgrade, Serbia
C3  - 7th Conference of The Serbian Society for Ceramic Materials
T1  - ENHANCING THE REACTIVITY OF THE INDUSTRIAL FLY ASH IN THE PROCESS OF ALKALI ACTIVATION
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2439
ER  - 

@conference{
author = "Džunuzović, Nataša and Komljenović, Miroslav M and Nikolić, Violeta and Baščarević, Zvezdana",
year = "2023",
abstract = "Over the past few decades a new group of binding materials, geopolymers, have
emerged as an alternative to traditional binding materials such as Portland cement.
Geopolymers are obtained by the process of alkali activation of various alumino-
silicate materials, both natural and synthetic. Of particular importance is the
possibility of alkali activation of the industrial waste material such as fly ash. Fly
ash (FA) is generated in the process of coal combustion in thermal power plants. In
Serbia a small part of fly ash is recycled while the rest is landfilled, causing a
serious environmental pollution. Alkali activation represents a process by which fly
ash can safely be converted into a useful biding material, suitable for the
construction purposes. Geopolymers (or alkali-activated materials) based on fly ash
are known for their good compressive strength and good durability in aggressive
environments, when propeerly designed. However, the limiting factor for wider use
of fly ash in the process of alkali activation and geopolymers synthesis is its low
reactivity and consequent low compressive strength of binding elements. Our
research has shown that the reactivity of fly ash in the process of alkali activation
can be enhanced by the appropriate choice of the reaction conditions – by
mechanical activation of fly ash and by blending with more reactive material such as
blast furnace slag (BFS). Both options were explored in this paper and comparison
was performed. Mechanical activation of fly ash was conducted in a planetary ball
mill, while blends of fly ash and blast furnace slag were prepared with different
ratios (FA/(FA+BFS) = 1; 0,75; 0,50; 0,25; 0). Alkali activation was carried out at
95ºC by use of sodium silicate solution as an activator. In both cases significant
increase of geopolymer compressive strength was observed in respect to the
geopolymer based on the initial fly ash. Optimal geopolymer strength was correlated
with the chemical composition of the binding gel. Empirical values of optimal gel
composition could serve as a basis for tailoring properties of alkali-activated binders
based on different precursors. Both alkali-activated systems represent promissing
routes for geopolymer technology development.",
publisher = "Institut za multidisciplinarna istraņivanja Kneza Vińeslava 1, 11000 Belgrade, Serbia",
journal = "7th Conference of The Serbian Society for Ceramic Materials",
title = "ENHANCING THE REACTIVITY OF THE INDUSTRIAL FLY ASH IN THE PROCESS OF ALKALI ACTIVATION",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2439"
}

Džunuzović, N., Komljenović, M. M., Nikolić, V.,& Baščarević, Z.. (2023). ENHANCING THE REACTIVITY OF THE INDUSTRIAL FLY ASH IN THE PROCESS OF ALKALI ACTIVATION. in 7th Conference of The Serbian Society for Ceramic Materials
Institut za multidisciplinarna istraņivanja Kneza Vińeslava 1, 11000 Belgrade, Serbia..
https://hdl.handle.net/21.15107/rcub_rimsi_2439

Džunuzović N, Komljenović MM, Nikolić V, Baščarević Z. ENHANCING THE REACTIVITY OF THE INDUSTRIAL FLY ASH IN THE PROCESS OF ALKALI ACTIVATION. in 7th Conference of The Serbian Society for Ceramic Materials. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2439 .

Džunuzović, Nataša, Komljenović, Miroslav M, Nikolić, Violeta, Baščarević, Zvezdana, "ENHANCING THE REACTIVITY OF THE INDUSTRIAL FLY ASH IN THE PROCESS OF ALKALI ACTIVATION" in 7th Conference of The Serbian Society for Ceramic Materials (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2439 .

TY  - CONF
AU  - Nikolić, Violeta
AU  - Komljenović, Miroslav M
AU  - Džunuzović, Nataša
AU  - Ivanović, Tijana
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1187
AB  - This paper investigates the influence of mechanical activation of fly ash on the toxic metals immobilization by fly ash-based geopolymers. Fly ash was firstly mechanically and then alkali-activated. Mechanical activation of fly ash was conducted in a planetary ball mill. Alkali activation of fly ash was carried out at room temperature by use of sodium silicate solution as an activator. Toxic metals (Pb and Cr) were added in the form of water soluble salts during the synthesis of geopolymers. The immobilization process was assessed via investigation of the mechanical and leaching properties of geopolymers. Structural changes of geopolymers during the toxic metals immobilization were assessed by means of gas adsorption and SEM analyses. Mechanical activation of fly ash led to a significant increase in geopolymer strength and to a reduced leaching of toxic metals from geopolymers.
PB  - Trans Tech Publications Ltd
C3  - Key Engineering Materials
T1  - The influence of mechanical activation of fly ash on the toxic metals immobilization by fly ash-based geopolymers
EP  - 6
SP  - 3
VL  - 761 KEM
DO  - 10.4028/www.scientific.net/KEM.761.3
ER  - 

@conference{
author = "Nikolić, Violeta and Komljenović, Miroslav M and Džunuzović, Nataša and Ivanović, Tijana",
year = "2018",
abstract = "This paper investigates the influence of mechanical activation of fly ash on the toxic metals immobilization by fly ash-based geopolymers. Fly ash was firstly mechanically and then alkali-activated. Mechanical activation of fly ash was conducted in a planetary ball mill. Alkali activation of fly ash was carried out at room temperature by use of sodium silicate solution as an activator. Toxic metals (Pb and Cr) were added in the form of water soluble salts during the synthesis of geopolymers. The immobilization process was assessed via investigation of the mechanical and leaching properties of geopolymers. Structural changes of geopolymers during the toxic metals immobilization were assessed by means of gas adsorption and SEM analyses. Mechanical activation of fly ash led to a significant increase in geopolymer strength and to a reduced leaching of toxic metals from geopolymers.",
publisher = "Trans Tech Publications Ltd",
journal = "Key Engineering Materials",
title = "The influence of mechanical activation of fly ash on the toxic metals immobilization by fly ash-based geopolymers",
pages = "6-3",
volume = "761 KEM",
doi = "10.4028/www.scientific.net/KEM.761.3"
}

Nikolić, V., Komljenović, M. M., Džunuzović, N.,& Ivanović, T.. (2018). The influence of mechanical activation of fly ash on the toxic metals immobilization by fly ash-based geopolymers. in Key Engineering Materials
Trans Tech Publications Ltd., 761 KEM, 3-6.
https://doi.org/10.4028/www.scientific.net/KEM.761.3

Nikolić V, Komljenović MM, Džunuzović N, Ivanović T. The influence of mechanical activation of fly ash on the toxic metals immobilization by fly ash-based geopolymers. in Key Engineering Materials. 2018;761 KEM:3-6.
doi:10.4028/www.scientific.net/KEM.761.3 .

Nikolić, Violeta, Komljenović, Miroslav M, Džunuzović, Nataša, Ivanović, Tijana, "The influence of mechanical activation of fly ash on the toxic metals immobilization by fly ash-based geopolymers" in Key Engineering Materials, 761 KEM (2018):3-6,
https://doi.org/10.4028/www.scientific.net/KEM.761.3 . .

TY  - CONF
AU  - Komljenović, Miroslav M
AU  - Džunuzović, Nataša
AU  - Nikolić, Violeta
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1129
AB  - Durability of binders, mortars and concretes in aggressive environments is of crucial importance for their commercial application. In this paper the resistance to external sulfate attack of two different alkali-activated binders (AABs), based either on blast furnace slag (BFS) or fly ash/blast furnace slag (FA/BFS) blend, was compared with two different commercially available Portland cement (CEM II) blended either with BFS or with FA and BFS. Comparison of sulfate resistance was based on compressive strength testing (the loss of strength) of mortar samples exposed to sodium sulfate attack up to 180 days and samples cured under controlled conditions for the same period of time. Furthermore, the evolution of microstructure of alkali-activated binders and pH of sodium silicate solution during testing were also analyzed. Despite different gel chemistry being involved, both alkali-activated binders based either on BFS or FA/BFS blend showed excellent resistance to external sulfate attack and even better than selected Portland cements tested under the same experimental conditions.
PB  - E D P Sciences, Cedex A
C3  - 8th Scientific-Technical Conference on Material Problems in Civil Engineering (Matbud'2018)
T1  - Resistance to external sulfate attack - Comparison of two alkali-activated binders
VL  - 163
DO  - 10.1051/matecconf/201816306001
ER  - 

@conference{
author = "Komljenović, Miroslav M and Džunuzović, Nataša and Nikolić, Violeta",
year = "2018",
abstract = "Durability of binders, mortars and concretes in aggressive environments is of crucial importance for their commercial application. In this paper the resistance to external sulfate attack of two different alkali-activated binders (AABs), based either on blast furnace slag (BFS) or fly ash/blast furnace slag (FA/BFS) blend, was compared with two different commercially available Portland cement (CEM II) blended either with BFS or with FA and BFS. Comparison of sulfate resistance was based on compressive strength testing (the loss of strength) of mortar samples exposed to sodium sulfate attack up to 180 days and samples cured under controlled conditions for the same period of time. Furthermore, the evolution of microstructure of alkali-activated binders and pH of sodium silicate solution during testing were also analyzed. Despite different gel chemistry being involved, both alkali-activated binders based either on BFS or FA/BFS blend showed excellent resistance to external sulfate attack and even better than selected Portland cements tested under the same experimental conditions.",
publisher = "E D P Sciences, Cedex A",
journal = "8th Scientific-Technical Conference on Material Problems in Civil Engineering (Matbud'2018)",
title = "Resistance to external sulfate attack - Comparison of two alkali-activated binders",
volume = "163",
doi = "10.1051/matecconf/201816306001"
}

Komljenović, M. M., Džunuzović, N.,& Nikolić, V.. (2018). Resistance to external sulfate attack - Comparison of two alkali-activated binders. in 8th Scientific-Technical Conference on Material Problems in Civil Engineering (Matbud'2018)
E D P Sciences, Cedex A., 163.
https://doi.org/10.1051/matecconf/201816306001

Komljenović MM, Džunuzović N, Nikolić V. Resistance to external sulfate attack - Comparison of two alkali-activated binders. in 8th Scientific-Technical Conference on Material Problems in Civil Engineering (Matbud'2018). 2018;163.
doi:10.1051/matecconf/201816306001 .

Komljenović, Miroslav M, Džunuzović, Nataša, Nikolić, Violeta, "Resistance to external sulfate attack - Comparison of two alkali-activated binders" in 8th Scientific-Technical Conference on Material Problems in Civil Engineering (Matbud'2018), 163 (2018),
https://doi.org/10.1051/matecconf/201816306001 . .

TY  - JOUR
AU  - Džunuzović, Nataša
AU  - Komljenović, Miroslav M
AU  - Nikolić, Violeta
AU  - Ivanović, Tijana
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1043
AB  - Reliable durability testing of alkali-activated binders, which might serve as a basis for the prediction of long-term field performance, is one of the main challenges towards broader commercial applications of AAB. This study investigated the influence of 5% Na2SO4 solution on mechanical and microstructural properties of alkali-activated binder based on fly ash and blast furnace slag (FA-BFS) composite. The influence of Na2SO4 solution was investigated during the period of 180 days and estimated by comparison with the reference samples simultaneously cured in a humid chamber and with the benchmark material CEM II. Strength, leaching (ICP-OES), pH, XRD, ATR-FTIR, and SEM/EDS analyses were performed. The Strength Loss Index was higher than 1 throughout the whole period of testing indicating strength increase during the exposure to sulfate attack rather than the loss of strength. Slower compressive strength development of the samples exposed to the sulfate solution in comparison with the reference samples was also observed. The exposure of alkali-activated binder to the sulfate solution led to a decrease in the Si/Al atomic ratio of binder matrix due to the leaching of Si, causing slower compressive strength development at the same time. The accelerated testing method used confirmed high resistance both of alkali-activated binder based on fly ash-blast furnace slag and CEM II to external sulfate attack and at the same time confirmed its ability to discriminate the resistance of different type of binders to sulfate aggressive environment.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - External sulfate attack on alkali-activated fly ash-blast furnace slag composite
EP  - 747
SP  - 737
VL  - 157
DO  - 10.1016/j.conbuildmat.2017.09.159
ER  - 

@article{
author = "Džunuzović, Nataša and Komljenović, Miroslav M and Nikolić, Violeta and Ivanović, Tijana",
year = "2017",
abstract = "Reliable durability testing of alkali-activated binders, which might serve as a basis for the prediction of long-term field performance, is one of the main challenges towards broader commercial applications of AAB. This study investigated the influence of 5% Na2SO4 solution on mechanical and microstructural properties of alkali-activated binder based on fly ash and blast furnace slag (FA-BFS) composite. The influence of Na2SO4 solution was investigated during the period of 180 days and estimated by comparison with the reference samples simultaneously cured in a humid chamber and with the benchmark material CEM II. Strength, leaching (ICP-OES), pH, XRD, ATR-FTIR, and SEM/EDS analyses were performed. The Strength Loss Index was higher than 1 throughout the whole period of testing indicating strength increase during the exposure to sulfate attack rather than the loss of strength. Slower compressive strength development of the samples exposed to the sulfate solution in comparison with the reference samples was also observed. The exposure of alkali-activated binder to the sulfate solution led to a decrease in the Si/Al atomic ratio of binder matrix due to the leaching of Si, causing slower compressive strength development at the same time. The accelerated testing method used confirmed high resistance both of alkali-activated binder based on fly ash-blast furnace slag and CEM II to external sulfate attack and at the same time confirmed its ability to discriminate the resistance of different type of binders to sulfate aggressive environment.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "External sulfate attack on alkali-activated fly ash-blast furnace slag composite",
pages = "747-737",
volume = "157",
doi = "10.1016/j.conbuildmat.2017.09.159"
}

Džunuzović, N., Komljenović, M. M., Nikolić, V.,& Ivanović, T.. (2017). External sulfate attack on alkali-activated fly ash-blast furnace slag composite. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 157, 737-747.
https://doi.org/10.1016/j.conbuildmat.2017.09.159

Džunuzović N, Komljenović MM, Nikolić V, Ivanović T. External sulfate attack on alkali-activated fly ash-blast furnace slag composite. in Construction and Building Materials. 2017;157:737-747.
doi:10.1016/j.conbuildmat.2017.09.159 .

Džunuzović, Nataša, Komljenović, Miroslav M, Nikolić, Violeta, Ivanović, Tijana, "External sulfate attack on alkali-activated fly ash-blast furnace slag composite" in Construction and Building Materials, 157 (2017):737-747,
https://doi.org/10.1016/j.conbuildmat.2017.09.159 . .

TY  - JOUR
AU  - Nikolić, Violeta
AU  - Komljenović, Miroslav M
AU  - Džunuzović, Nataša
AU  - Ivanović, Tijana
AU  - Miladinović, Zoran P.
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1041
AB  - In this paper the immobilization of hexavalent chromium (Cr (VI)) by fly ash (FA)-based geopolymers was investigated, depending on FA characteristics, mechanical activation of FA, geopolymer synthesis conditions and concentration of Cr added. The effectiveness of Cr immobilization was determined via investigation of geopolymer compressive strength and Cr leaching. Structural changes of geopolymers during the Cr immobilization were assessed by means of gas adsorption, XRD, and NMR analysis. FA reactivity was a key factor determining both physical-mechanical and immobilizing properties of geopolymers. Mechanical activation of FA caused an increase of both geopolymer strength and effectiveness of Cr immobilization. The presence of Cr induced physical-mechanical and structural changes in geopolymers. The correlation between concentration of Cr leached and geopolymer physical-mechanical and structural parameters was established.
PB  - Elsevier Sci Ltd, Oxford
T2  - Composites Part B-Engineering
T1  - Immobilization of hexavalent chromium by fly ash-based geopolymers
EP  - 223
SP  - 213
VL  - 112
DO  - 10.1016/j.compositesb.2016.12.024
ER  - 

@article{
author = "Nikolić, Violeta and Komljenović, Miroslav M and Džunuzović, Nataša and Ivanović, Tijana and Miladinović, Zoran P.",
year = "2017",
abstract = "In this paper the immobilization of hexavalent chromium (Cr (VI)) by fly ash (FA)-based geopolymers was investigated, depending on FA characteristics, mechanical activation of FA, geopolymer synthesis conditions and concentration of Cr added. The effectiveness of Cr immobilization was determined via investigation of geopolymer compressive strength and Cr leaching. Structural changes of geopolymers during the Cr immobilization were assessed by means of gas adsorption, XRD, and NMR analysis. FA reactivity was a key factor determining both physical-mechanical and immobilizing properties of geopolymers. Mechanical activation of FA caused an increase of both geopolymer strength and effectiveness of Cr immobilization. The presence of Cr induced physical-mechanical and structural changes in geopolymers. The correlation between concentration of Cr leached and geopolymer physical-mechanical and structural parameters was established.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Composites Part B-Engineering",
title = "Immobilization of hexavalent chromium by fly ash-based geopolymers",
pages = "223-213",
volume = "112",
doi = "10.1016/j.compositesb.2016.12.024"
}

Nikolić, V., Komljenović, M. M., Džunuzović, N., Ivanović, T.,& Miladinović, Z. P.. (2017). Immobilization of hexavalent chromium by fly ash-based geopolymers. in Composites Part B-Engineering
Elsevier Sci Ltd, Oxford., 112, 213-223.
https://doi.org/10.1016/j.compositesb.2016.12.024

Nikolić V, Komljenović MM, Džunuzović N, Ivanović T, Miladinović ZP. Immobilization of hexavalent chromium by fly ash-based geopolymers. in Composites Part B-Engineering. 2017;112:213-223.
doi:10.1016/j.compositesb.2016.12.024 .

Nikolić, Violeta, Komljenović, Miroslav M, Džunuzović, Nataša, Ivanović, Tijana, Miladinović, Zoran P., "Immobilization of hexavalent chromium by fly ash-based geopolymers" in Composites Part B-Engineering, 112 (2017):213-223,
https://doi.org/10.1016/j.compositesb.2016.12.024 . .

Džunuzović, N., Komljenović, M. M., Nikolić, V., Petrašinović-Stojkanović, L., Ivanović, T.,& Ršumović, M.. (2016). Tехнолошки поступак добијања алкално активираних композита отпорних на дејство хемијски агресивне средине. in 2016.
https://hdl.handle.net/21.15107/rcub_rimsi_2506

Džunuzović N, Komljenović MM, Nikolić V, Petrašinović-Stojkanović L, Ivanović T, Ršumović M. Tехнолошки поступак добијања алкално активираних композита отпорних на дејство хемијски агресивне средине. in 2016. 2016;.
https://hdl.handle.net/21.15107/rcub_rimsi_2506 .

Džunuzović, Nataša, Komljenović, Miroslav M, Nikolić, Violeta, Petrašinović-Stojkanović, Ljiljana, Ivanović, Tijana, Ršumović, Mihailo, "Tехнолошки поступак добијања алкално активираних композита отпорних на дејство хемијски агресивне средине" in 2016 (2016),
https://hdl.handle.net/21.15107/rcub_rimsi_2506 .

Baščarević, Z., Komljenović, M. M., Ršumović, M., Džunuzović, N.,& Nikolić, V.. (2016). Технолошки поступак синтезе термостабилног геополимера на бази електрофилтерског пепела из термоелектране Морава - Свилајнац применом комбинација раствора натријум-силиката и калијум-хидроксида као алкалног активатора. in 2016.
https://hdl.handle.net/21.15107/rcub_rimsi_2613

Baščarević Z, Komljenović MM, Ršumović M, Džunuzović N, Nikolić V. Технолошки поступак синтезе термостабилног геополимера на бази електрофилтерског пепела из термоелектране Морава - Свилајнац применом комбинација раствора натријум-силиката и калијум-хидроксида као алкалног активатора. in 2016. 2016;.
https://hdl.handle.net/21.15107/rcub_rimsi_2613 .

Baščarević, Zvezdana, Komljenović, Miroslav M, Ršumović, Mihailo, Džunuzović, Nataša, Nikolić, Violeta, "Технолошки поступак синтезе термостабилног геополимера на бази електрофилтерског пепела из термоелектране Морава - Свилајнац применом комбинација раствора натријум-силиката и калијум-хидроксида као алкалног активатора" in 2016 (2016),
https://hdl.handle.net/21.15107/rcub_rimsi_2613 .

Nikolić, V., Komljenović, M. M., Petrašinović-Stojkanović, L., Baščarević, Z., Džunuzović, N.,& Ršumović, M.. (2015). Технолошки поступак солидификације/стабилизације олова геополимерима на бази алкално активираног електрофилтерског пепела из термоелектране Морава. in 2015.
https://hdl.handle.net/21.15107/rcub_rimsi_2678

Nikolić V, Komljenović MM, Petrašinović-Stojkanović L, Baščarević Z, Džunuzović N, Ršumović M. Технолошки поступак солидификације/стабилизације олова геополимерима на бази алкално активираног електрофилтерског пепела из термоелектране Морава. in 2015. 2015;.
https://hdl.handle.net/21.15107/rcub_rimsi_2678 .

Nikolić, Violeta, Komljenović, Miroslav M, Petrašinović-Stojkanović, Ljiljana, Baščarević, Zvezdana, Džunuzović, Nataša, Ršumović, Mihailo, "Технолошки поступак солидификације/стабилизације олова геополимерима на бази алкално активираног електрофилтерског пепела из термоелектране Морава" in 2015 (2015),
https://hdl.handle.net/21.15107/rcub_rimsi_2678 .

Džunuzović, N., Komljenović, M. M., Baščarević, Z., Nikolić, V., Petrašinović-Stojkanović, L.,& Ršumović, M.. (2015). Tехнолошки поступак синтезе везива алкалном активацијом смеше електрофилтерског пепела из термоелектране ''Морава'' и згуре високе пећи из железаре ''Смедерево''. in 2015.
https://hdl.handle.net/21.15107/rcub_rimsi_2664

Džunuzović N, Komljenović MM, Baščarević Z, Nikolić V, Petrašinović-Stojkanović L, Ršumović M. Tехнолошки поступак синтезе везива алкалном активацијом смеше електрофилтерског пепела из термоелектране ''Морава'' и згуре високе пећи из железаре ''Смедерево''. in 2015. 2015;.
https://hdl.handle.net/21.15107/rcub_rimsi_2664 .

Džunuzović, Nataša, Komljenović, Miroslav M, Baščarević, Zvezdana, Nikolić, Violeta, Petrašinović-Stojkanović, Ljiljana, Ršumović, Mihailo, "Tехнолошки поступак синтезе везива алкалном активацијом смеше електрофилтерског пепела из термоелектране ''Морава'' и згуре високе пећи из железаре ''Смедерево''" in 2015 (2015),
https://hdl.handle.net/21.15107/rcub_rimsi_2664 .

TY  - CONF
AU  - Džunuzović, Nataša
AU  - Komljenović, Miroslav M
AU  - Baščarević, Zvezdana
AU  - Nikolić, Violeta
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/901
AB  - Poor reactivity of fly ash (FA) in alkali activation process can be improved either by mechanical activation of fly ash or by blending fly ash with more reactive material, such as blast furnace slag (BFS). Both options were explored in this paper and comparison was performed. Mechanical activation of fly ash was conducted in a planetary ball mill, while blends of fly ash and blast furnace slag were prepared with different ratios (FA/(FA+ BFS) = 1; 0.75; 0.50; 0.25; 0). Alkali activation was carried out at 95 degrees C by use of sodium silicate solution as an activator. In both cases significant increase of geopolymer strength was observed in respect to the geopolymer based on the initial fly ash. Optimal geopolymer strength was correlated with the chemical composition of the binding gel. Empirical values of optimal gel composition could serve as a basis for tailoring properties of alkali-activated binders based on different precursors. Both alkali-activated systems represent promissing routes for geopolymer technology development.
PB  - Elsevier Science Bv, Amsterdam
C3  - 7th Scientific-Technical Conference on Material Problems in Civil Engineering (Matbud'2015)
T1  - Comparison of two alkali-activated systems: mechanically activated fly ash and fly ash-blast furnace slag blends
EP  - 238
SP  - 231
VL  - 108
DO  - 10.1016/j.proeng.2015.06.142
ER  - 

@conference{
author = "Džunuzović, Nataša and Komljenović, Miroslav M and Baščarević, Zvezdana and Nikolić, Violeta",
year = "2015",
abstract = "Poor reactivity of fly ash (FA) in alkali activation process can be improved either by mechanical activation of fly ash or by blending fly ash with more reactive material, such as blast furnace slag (BFS). Both options were explored in this paper and comparison was performed. Mechanical activation of fly ash was conducted in a planetary ball mill, while blends of fly ash and blast furnace slag were prepared with different ratios (FA/(FA+ BFS) = 1; 0.75; 0.50; 0.25; 0). Alkali activation was carried out at 95 degrees C by use of sodium silicate solution as an activator. In both cases significant increase of geopolymer strength was observed in respect to the geopolymer based on the initial fly ash. Optimal geopolymer strength was correlated with the chemical composition of the binding gel. Empirical values of optimal gel composition could serve as a basis for tailoring properties of alkali-activated binders based on different precursors. Both alkali-activated systems represent promissing routes for geopolymer technology development.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "7th Scientific-Technical Conference on Material Problems in Civil Engineering (Matbud'2015)",
title = "Comparison of two alkali-activated systems: mechanically activated fly ash and fly ash-blast furnace slag blends",
pages = "238-231",
volume = "108",
doi = "10.1016/j.proeng.2015.06.142"
}

Džunuzović, N., Komljenović, M. M., Baščarević, Z.,& Nikolić, V.. (2015). Comparison of two alkali-activated systems: mechanically activated fly ash and fly ash-blast furnace slag blends. in 7th Scientific-Technical Conference on Material Problems in Civil Engineering (Matbud'2015)
Elsevier Science Bv, Amsterdam., 108, 231-238.
https://doi.org/10.1016/j.proeng.2015.06.142

Džunuzović N, Komljenović MM, Baščarević Z, Nikolić V. Comparison of two alkali-activated systems: mechanically activated fly ash and fly ash-blast furnace slag blends. in 7th Scientific-Technical Conference on Material Problems in Civil Engineering (Matbud'2015). 2015;108:231-238.
doi:10.1016/j.proeng.2015.06.142 .

Džunuzović, Nataša, Komljenović, Miroslav M, Baščarević, Zvezdana, Nikolić, Violeta, "Comparison of two alkali-activated systems: mechanically activated fly ash and fly ash-blast furnace slag blends" in 7th Scientific-Technical Conference on Material Problems in Civil Engineering (Matbud'2015), 108 (2015):231-238,
https://doi.org/10.1016/j.proeng.2015.06.142 . .

TY  - CONF
AU  - Baščarević, Zvezdana
AU  - Komljenović, Miroslav M
AU  - Nikolić, Violeta
AU  - Džunuzović, Nataša
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/900
AB  - This paper analyzes the effects of two different aggressive environments, concentrated ammonium nitrate solution (480 g/dm(3)) and sodium sulphate solution (50 g/dm(3)), on the structure and mechanical strength of fly ash based geopolymers. Geopolymer samples were subjected to the aggressive solutions over a period of 365 days. It was found that exposure to the NH4NO3 and Na2SO4 solutions caused small decrease in geopolymer strength (10-20 %). The most valuable insight into the structural changes caused by testing of the geopolymer samples in the aggressive solutions was provided by means of Si-29 MAS NMR. It was found that the immersion of geopolymer samples in the NH4NO3 solution caused breaking of Si-O-Al bonds in the aluminosilicate geopolymer gel structure. On the other hand, treatment of the geopolymer samples with the Na2SO4 solution resulted in breaking of Si-O-Si bonds in geopolymer gel structure and leaching of Si. It was concluded that the major changes in the geopolymer structure were associated with the changes in the pH values of aggressive solutions during the testing.
PB  - IOP Publishing Ltd, Bristol
C3  - 2nd International Conference on Innovative Materials, Structures and Technologies
T1  - The Effects of Aggressive Environments on the Properties of Fly Ash based Geopolymers
VL  - 96
DO  - 10.1088/1757-899X/96/1/012001
ER  - 

@conference{
author = "Baščarević, Zvezdana and Komljenović, Miroslav M and Nikolić, Violeta and Džunuzović, Nataša",
year = "2015",
abstract = "This paper analyzes the effects of two different aggressive environments, concentrated ammonium nitrate solution (480 g/dm(3)) and sodium sulphate solution (50 g/dm(3)), on the structure and mechanical strength of fly ash based geopolymers. Geopolymer samples were subjected to the aggressive solutions over a period of 365 days. It was found that exposure to the NH4NO3 and Na2SO4 solutions caused small decrease in geopolymer strength (10-20 %). The most valuable insight into the structural changes caused by testing of the geopolymer samples in the aggressive solutions was provided by means of Si-29 MAS NMR. It was found that the immersion of geopolymer samples in the NH4NO3 solution caused breaking of Si-O-Al bonds in the aluminosilicate geopolymer gel structure. On the other hand, treatment of the geopolymer samples with the Na2SO4 solution resulted in breaking of Si-O-Si bonds in geopolymer gel structure and leaching of Si. It was concluded that the major changes in the geopolymer structure were associated with the changes in the pH values of aggressive solutions during the testing.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "2nd International Conference on Innovative Materials, Structures and Technologies",
title = "The Effects of Aggressive Environments on the Properties of Fly Ash based Geopolymers",
volume = "96",
doi = "10.1088/1757-899X/96/1/012001"
}

Baščarević, Z., Komljenović, M. M., Nikolić, V.,& Džunuzović, N.. (2015). The Effects of Aggressive Environments on the Properties of Fly Ash based Geopolymers. in 2nd International Conference on Innovative Materials, Structures and Technologies
IOP Publishing Ltd, Bristol., 96.
https://doi.org/10.1088/1757-899X/96/1/012001

Baščarević Z, Komljenović MM, Nikolić V, Džunuzović N. The Effects of Aggressive Environments on the Properties of Fly Ash based Geopolymers. in 2nd International Conference on Innovative Materials, Structures and Technologies. 2015;96.
doi:10.1088/1757-899X/96/1/012001 .

Baščarević, Zvezdana, Komljenović, Miroslav M, Nikolić, Violeta, Džunuzović, Nataša, "The Effects of Aggressive Environments on the Properties of Fly Ash based Geopolymers" in 2nd International Conference on Innovative Materials, Structures and Technologies, 96 (2015),
https://doi.org/10.1088/1757-899X/96/1/012001 . .

TY  - JOUR
AU  - Baščarević, Zvezdana
AU  - Komljenović, Miroslav M
AU  - Miladinović, Zoran P.
AU  - Nikolić, Violeta
AU  - Džunuzović, Nataša
AU  - Petrović, Rada
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/892
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 M and Miladinović, Zoran P. and Nikolić, Violeta and Džunuzović, 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. M., Miladinović, Z. P., Nikolić, V., Džunuzović, 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 MM, Miladinović ZP, Nikolić V, Džunuzović 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 M, Miladinović, Zoran P., Nikolić, Violeta, Džunuzović, 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  - Džunuzović, Nataša
AU  - Komljenović, Miroslav M
AU  - Baščarević, Zvezdana
AU  - Nikolić, Violeta
AU  - Petrović, R.
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/886
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 = "Džunuzović, Nataša and Komljenović, Miroslav M and Baščarević, Zvezdana and Nikolić, Violeta and Petrović, R.",
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"
}

Džunuzović, N., Komljenović, M. 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

Džunuzović N, Komljenović MM, 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 .

Džunuzović, Nataša, Komljenović, Miroslav M, Baščarević, Zvezdana, Nikolić, Violeta, Petrović, R., "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 M
AU  - Baščarević, Zvezdana
AU  - Džunuzović, Nataša
AU  - Miladinović, Zoran P.
AU  - Petrović, Rada
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/825
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 M and Baščarević, Zvezdana and Džunuzović, 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. M., Baščarević, Z., Džunuzović, 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 MM, Baščarević Z, Džunuzović 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 M, Baščarević, Zvezdana, Džunuzović, 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 . .

Nikolić, V., Komljenović, M. M., Džunuzović, N., Baščarević, Z., Petrašinović-Stojkanović, L.,& Ršumović, M.. (2014). Технолошки поступак солидификације олова геополимерима на бази механички и алкално активираног електрофилтерског пепела. in 2014.
https://hdl.handle.net/21.15107/rcub_rimsi_2688

Nikolić V, Komljenović MM, Džunuzović N, Baščarević Z, Petrašinović-Stojkanović L, Ršumović M. Технолошки поступак солидификације олова геополимерима на бази механички и алкално активираног електрофилтерског пепела. in 2014. 2014;.
https://hdl.handle.net/21.15107/rcub_rimsi_2688 .

Nikolić, Violeta, Komljenović, Miroslav M, Džunuzović, Nataša, Baščarević, Zvezdana, Petrašinović-Stojkanović, Ljiljana, Ršumović, Mihailo, "Технолошки поступак солидификације олова геополимерима на бази механички и алкално активираног електрофилтерског пепела" in 2014 (2014),
https://hdl.handle.net/21.15107/rcub_rimsi_2688 .

TY  - JOUR
AU  - Nikolić, Violeta
AU  - Komljenović, Miroslav M
AU  - Džunuzović, Nataša
AU  - Baščarević, Zvezdana
AU  - Petrović, Rada D
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/795
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 M and Džunuzović, Nataša and Baščarević, Zvezdana and Petrović, Rada D",
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. M., Džunuzović, N., Baščarević, Z.,& Petrović, R. D.. (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 MM, Džunuzović N, Baščarević Z, Petrović RD. 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 M, Džunuzović, Nataša, Baščarević, Zvezdana, Petrović, Rada D, "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  - Džunuzović, Nataša
AU  - Komljenović, Miroslav M
AU  - Baščarević, Zvezdana
AU  - Nikolić, Violeta
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/792
AB  - This paper investigated the effects of mechanical activation of fly ash (FA) from thermal power plants on physical-mechanical properties and structure of geopolymers. FA from different power plants in Serbia was mechanically activated in planetary ball mill. Geopolymerization was conducted by use of sodium silicate (water glass) at elevated temperature (95 degrees C) for 4 h. It was observed that mechanical activation of FA for 15 mm resulted in drastic increase of geopolymer compressive strength (in all cases >1000%). High strength values were associated with improved FA reactivity obtained mainly by the reduction in particle size and reduced water/binder ratio.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - Improving reactivity of fly ash and properties of ensuing geopolymers through mechanical activation
EP  - 162
SP  - 151
VL  - 57
DO  - 10.1016/j.conbuildmat.2014.01.095
ER  - 

@article{
author = "Džunuzović, Nataša and Komljenović, Miroslav M and Baščarević, Zvezdana and Nikolić, Violeta",
year = "2014",
abstract = "This paper investigated the effects of mechanical activation of fly ash (FA) from thermal power plants on physical-mechanical properties and structure of geopolymers. FA from different power plants in Serbia was mechanically activated in planetary ball mill. Geopolymerization was conducted by use of sodium silicate (water glass) at elevated temperature (95 degrees C) for 4 h. It was observed that mechanical activation of FA for 15 mm resulted in drastic increase of geopolymer compressive strength (in all cases >1000%). High strength values were associated with improved FA reactivity obtained mainly by the reduction in particle size and reduced water/binder ratio.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "Improving reactivity of fly ash and properties of ensuing geopolymers through mechanical activation",
pages = "162-151",
volume = "57",
doi = "10.1016/j.conbuildmat.2014.01.095"
}

Džunuzović, N., Komljenović, M. M., Baščarević, Z.,& Nikolić, V.. (2014). Improving reactivity of fly ash and properties of ensuing geopolymers through mechanical activation. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 57, 151-162.
https://doi.org/10.1016/j.conbuildmat.2014.01.095

Džunuzović N, Komljenović MM, Baščarević Z, Nikolić V. Improving reactivity of fly ash and properties of ensuing geopolymers through mechanical activation. in Construction and Building Materials. 2014;57:151-162.
doi:10.1016/j.conbuildmat.2014.01.095 .

Džunuzović, Nataša, Komljenović, Miroslav M, Baščarević, Zvezdana, Nikolić, Violeta, "Improving reactivity of fly ash and properties of ensuing geopolymers through mechanical activation" in Construction and Building Materials, 57 (2014):151-162,
https://doi.org/10.1016/j.conbuildmat.2014.01.095 . .

TY  - JOUR
AU  - Komljenović, Miroslav M
AU  - Baščarević, Zvezdana
AU  - Džunuzović, Nataša
AU  - Nikolić, Violeta
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/732
AB  - This paper analyses the effects of external sulfate attack (5% Na2SO4 solution) on mechanical and microstructural properties of alkali-activated slag (AAS). Portland-slag cement (CEM II/A-S 42.5N) was used as a benchmark material. External sulfate attack led to a decrease in strength of CEM II, but not of AAS. Under the investigated experimental conditions, AAS showed significantly higher resistance to sulfate attack with respect to the benchmark CEM II. A very pronounced resistance of AAS to sulfate attack can be explained by the absence of portlandite and unavailability of aluminum, present in C-S-H(I) and hydrotalcite gels, for the reaction with sulfates.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - External sulfate attack on alkali-activated slag
EP  - 39
SP  - 31
VL  - 49
DO  - 10.1016/j.conbuildmat.2013.08.013
ER  - 

@article{
author = "Komljenović, Miroslav M and Baščarević, Zvezdana and Džunuzović, Nataša and Nikolić, Violeta",
year = "2013",
abstract = "This paper analyses the effects of external sulfate attack (5% Na2SO4 solution) on mechanical and microstructural properties of alkali-activated slag (AAS). Portland-slag cement (CEM II/A-S 42.5N) was used as a benchmark material. External sulfate attack led to a decrease in strength of CEM II, but not of AAS. Under the investigated experimental conditions, AAS showed significantly higher resistance to sulfate attack with respect to the benchmark CEM II. A very pronounced resistance of AAS to sulfate attack can be explained by the absence of portlandite and unavailability of aluminum, present in C-S-H(I) and hydrotalcite gels, for the reaction with sulfates.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "External sulfate attack on alkali-activated slag",
pages = "39-31",
volume = "49",
doi = "10.1016/j.conbuildmat.2013.08.013"
}

Komljenović, M. M., Baščarević, Z., Džunuzović, N.,& Nikolić, V.. (2013). External sulfate attack on alkali-activated slag. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 49, 31-39.
https://doi.org/10.1016/j.conbuildmat.2013.08.013

Komljenović MM, Baščarević Z, Džunuzović N, Nikolić V. External sulfate attack on alkali-activated slag. in Construction and Building Materials. 2013;49:31-39.
doi:10.1016/j.conbuildmat.2013.08.013 .

Komljenović, Miroslav M, Baščarević, Zvezdana, Džunuzović, Nataša, Nikolić, Violeta, "External sulfate attack on alkali-activated slag" in Construction and Building Materials, 49 (2013):31-39,
https://doi.org/10.1016/j.conbuildmat.2013.08.013 . .

TY  - JOUR
AU  - Baščarević, Zvezdana
AU  - Komljenović, Miroslav M
AU  - Miladinović, Zoran P.
AU  - Nikolić, Violeta
AU  - Džunuzović, Nataša
AU  - Zujović, Zoran D
AU  - Petrović, Rada D
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/724
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 M and Miladinović, Zoran P. and Nikolić, Violeta and Džunuzović, Nataša and Zujović, Zoran D and Petrović, Rada D",
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. M., Miladinović, Z. P., Nikolić, V., Džunuzović, N., Zujović, Z. D.,& Petrović, R. D.. (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 MM, Miladinović ZP, Nikolić V, Džunuzović N, Zujović ZD, Petrović RD. 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 M, Miladinović, Zoran P., Nikolić, Violeta, Džunuzović, Nataša, Zujović, Zoran D, Petrović, Rada D, "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 . .

Komljenović, M. M., Ršumović, M., Džunuzović, N., Baščarević, Z., Petrašinović-Stojkanović, L.,& Nikolić, V.. (2012). Tехнолошки поступак синтезе геополимера механо-хемијско-термичком активацијом електрофилтерског пепела из термоелектране ''Костолац Б1'', Костолац. in 2012.
https://hdl.handle.net/21.15107/rcub_rimsi_2714

Komljenović MM, Ršumović M, Džunuzović N, Baščarević Z, Petrašinović-Stojkanović L, Nikolić V. Tехнолошки поступак синтезе геополимера механо-хемијско-термичком активацијом електрофилтерског пепела из термоелектране ''Костолац Б1'', Костолац. in 2012. 2012;.
https://hdl.handle.net/21.15107/rcub_rimsi_2714 .

Komljenović, Miroslav M, Ršumović, Mihailo, Džunuzović, Nataša, Baščarević, Zvezdana, Petrašinović-Stojkanović, Ljiljana, Nikolić, Violeta, "Tехнолошки поступак синтезе геополимера механо-хемијско-термичком активацијом електрофилтерског пепела из термоелектране ''Костолац Б1'', Костолац" in 2012 (2012),
https://hdl.handle.net/21.15107/rcub_rimsi_2714 .

Nikolić, V., Komljenović, M. M., Džunuzović, N., Petrašinović-Stojkanović, L., Baščarević, Z.,& Ršumović, M.. (2012). Технолошки поступак синтезе геополимера механичком и хемијском активацијом електрофилтерског пепела из термоелектране ''Никола Тесла'', Обреновац. in 2012.
https://hdl.handle.net/21.15107/rcub_rimsi_2710

Nikolić V, Komljenović MM, Džunuzović N, Petrašinović-Stojkanović L, Baščarević Z, Ršumović M. Технолошки поступак синтезе геополимера механичком и хемијском активацијом електрофилтерског пепела из термоелектране ''Никола Тесла'', Обреновац. in 2012. 2012;.
https://hdl.handle.net/21.15107/rcub_rimsi_2710 .

Nikolić, Violeta, Komljenović, Miroslav M, Džunuzović, Nataša, Petrašinović-Stojkanović, Ljiljana, Baščarević, Zvezdana, Ršumović, Mihailo, "Технолошки поступак синтезе геополимера механичком и хемијском активацијом електрофилтерског пепела из термоелектране ''Никола Тесла'', Обреновац" in 2012 (2012),
https://hdl.handle.net/21.15107/rcub_rimsi_2710 .

Komljenović, M. M., Džunuzović, N., Petrašinović-Stojkanović, L., Ršumović, M.,& Nikolić, V.. (2012). Tехнолошки поступак синтезе геополимера механичком и хемијском активацијом електрофилтерског пепела из термоелектране ''Костолац Б1'', Костолац. in 2012.
https://hdl.handle.net/21.15107/rcub_rimsi_2709

Komljenović MM, Džunuzović N, Petrašinović-Stojkanović L, Ršumović M, Nikolić V. Tехнолошки поступак синтезе геополимера механичком и хемијском активацијом електрофилтерског пепела из термоелектране ''Костолац Б1'', Костолац. in 2012. 2012;.
https://hdl.handle.net/21.15107/rcub_rimsi_2709 .

Komljenović, Miroslav M, Džunuzović, Nataša, Petrašinović-Stojkanović, Ljiljana, Ršumović, Mihailo, Nikolić, Violeta, "Tехнолошки поступак синтезе геополимера механичком и хемијском активацијом електрофилтерског пепела из термоелектране ''Костолац Б1'', Костолац" in 2012 (2012),
https://hdl.handle.net/21.15107/rcub_rimsi_2709 .

Džunuzović, N., Komljenović, M. M., Petrašinović-Stojkanović, L., Baščarević, Z., Nikolić, V., Ršumović, M.,& Miladinović, Z.. (2012). Технолошки поступак синтезе геопполимера механо-хемијско-термичком активацијом електрофилтерског пепела из термоелектране ''Никола Тесла'', Обреновац. in 2012.
https://hdl.handle.net/21.15107/rcub_rimsi_2691

Džunuzović N, Komljenović MM, Petrašinović-Stojkanović L, Baščarević Z, Nikolić V, Ršumović M, Miladinović Z. Технолошки поступак синтезе геопполимера механо-хемијско-термичком активацијом електрофилтерског пепела из термоелектране ''Никола Тесла'', Обреновац. in 2012. 2012;.
https://hdl.handle.net/21.15107/rcub_rimsi_2691 .

Džunuzović, Nataša, Komljenović, Miroslav M, Petrašinović-Stojkanović, Ljiljana, Baščarević, Zvezdana, Nikolić, Violeta, Ršumović, Mihailo, Miladinović, Zoran, "Технолошки поступак синтезе геопполимера механо-хемијско-термичком активацијом електрофилтерског пепела из термоелектране ''Никола Тесла'', Обреновац" in 2012 (2012),
https://hdl.handle.net/21.15107/rcub_rimsi_2691 .

TY  - JOUR
AU  - Komljenović, Miroslav M
AU  - Baščarević, Zvezdana
AU  - Džunuzović, Nataša
AU  - Nikolić, Violeta
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/601
AB  - This paper analyses the effects of decalcification in concentrated 6 M NH4NO3 solution on mechanical and microstructural properties of alkali-activated slag (AAS). Portland-slag cement (CEM II/A-S 42.5 N) was used as a benchmark material. Decalcification process led to a decrease in strength, both in AAS and in CEM II, and this effect was more pronounced in CEM II. The decrease in strength was explicitly related to the decrease in Ca/Si atomic ratio of C-S-H gel. A very low ratio of Ca/Si similar to 0.3 in AAS was the consequence of coexistence of C-S-H(I) gel and silica gel. During decalcification of AAS almost complete leaching of sodium and tetrahedral aluminum from C-S-H(I) gel also took place. AAS showed significantly higher resistance to decalcification in relation to the benchmark CEM II due to the absence of portlandite, high level of polymerization of silicate chains, low level of aluminum for silicon substitution in the structure of C-S-H(1), and the formation of protective layer of polymerized silica gel during decalcification process. In stabilization/solidification processes alkali-activated slag represents a more promising solution than Portland-slag cement due to significantly higher resistance to decalcification.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Hazardous Materials
T1  - Decalcification resistance of alkali-activated slag
EP  - 121
SP  - 112
VL  - 233
DO  - 10.1016/j.jhazmat.2012.06.063
ER  - 

@article{
author = "Komljenović, Miroslav M and Baščarević, Zvezdana and Džunuzović, Nataša and Nikolić, Violeta",
year = "2012",
abstract = "This paper analyses the effects of decalcification in concentrated 6 M NH4NO3 solution on mechanical and microstructural properties of alkali-activated slag (AAS). Portland-slag cement (CEM II/A-S 42.5 N) was used as a benchmark material. Decalcification process led to a decrease in strength, both in AAS and in CEM II, and this effect was more pronounced in CEM II. The decrease in strength was explicitly related to the decrease in Ca/Si atomic ratio of C-S-H gel. A very low ratio of Ca/Si similar to 0.3 in AAS was the consequence of coexistence of C-S-H(I) gel and silica gel. During decalcification of AAS almost complete leaching of sodium and tetrahedral aluminum from C-S-H(I) gel also took place. AAS showed significantly higher resistance to decalcification in relation to the benchmark CEM II due to the absence of portlandite, high level of polymerization of silicate chains, low level of aluminum for silicon substitution in the structure of C-S-H(1), and the formation of protective layer of polymerized silica gel during decalcification process. In stabilization/solidification processes alkali-activated slag represents a more promising solution than Portland-slag cement due to significantly higher resistance to decalcification.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Hazardous Materials",
title = "Decalcification resistance of alkali-activated slag",
pages = "121-112",
volume = "233",
doi = "10.1016/j.jhazmat.2012.06.063"
}

Komljenović, M. M., Baščarević, Z., Džunuzović, N.,& Nikolić, V.. (2012). Decalcification resistance of alkali-activated slag. in Journal of Hazardous Materials
Elsevier Science Bv, Amsterdam., 233, 112-121.
https://doi.org/10.1016/j.jhazmat.2012.06.063

Komljenović MM, Baščarević Z, Džunuzović N, Nikolić V. Decalcification resistance of alkali-activated slag. in Journal of Hazardous Materials. 2012;233:112-121.
doi:10.1016/j.jhazmat.2012.06.063 .

Komljenović, Miroslav M, Baščarević, Zvezdana, Džunuzović, Nataša, Nikolić, Violeta, "Decalcification resistance of alkali-activated slag" in Journal of Hazardous Materials, 233 (2012):112-121,
https://doi.org/10.1016/j.jhazmat.2012.06.063 . .