Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar
Apstrakt
In this paper we have investigated the influence of synthesis parameters on the mechanical properties of the fly-ash-based geopolymer paste and mortars. Moreover, the influence of an addition of limestone sand on the microstructure of fly-ash-based geopolymers was investigated as well. An addition of limestone sand increased the compressive strength of the fly-ash-based geopolymer mortar, in comparison to the strength of the geopolymer paste, by changing the composition of the gel phase in the geopolymer structure and with the physical strengthening due to the presence of well connected grains of the sand. The results have shown that the compressive strength and Young's modulus of elasticity of the fly-ash-based geopolymer mortar are correlated. The values of these parameters increase as the alkali and silicate dosages increase. At one point, they reach the maximum values and then start to decrease. On the other hand, the parameters that considerably increase the compressive strength s...lightly decrease the flexural strength of the geopolymer mortar.
Ključne reči:
geopolymerization / fly ash / mortar / flexural strength / compressive strength / Young's modulusIzvor:
Materiali in Tehnologije, 2013, 47, 4, 535-540Izdavač:
- Institute of Metals and Technology
Finansiranje / projekti:
- Montenegrin Ministry of Science [01-460]
- U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC02-05CH11231]
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Zejak, Radomir AU - Nikolić, Irena AU - Blecić, Dragoljub AU - Radmilović, Vuk AU - Radmilović, Velimir R. PY - 2013 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2257 AB - In this paper we have investigated the influence of synthesis parameters on the mechanical properties of the fly-ash-based geopolymer paste and mortars. Moreover, the influence of an addition of limestone sand on the microstructure of fly-ash-based geopolymers was investigated as well. An addition of limestone sand increased the compressive strength of the fly-ash-based geopolymer mortar, in comparison to the strength of the geopolymer paste, by changing the composition of the gel phase in the geopolymer structure and with the physical strengthening due to the presence of well connected grains of the sand. The results have shown that the compressive strength and Young's modulus of elasticity of the fly-ash-based geopolymer mortar are correlated. The values of these parameters increase as the alkali and silicate dosages increase. At one point, they reach the maximum values and then start to decrease. On the other hand, the parameters that considerably increase the compressive strength slightly decrease the flexural strength of the geopolymer mortar. PB - Institute of Metals and Technology T2 - Materiali in Tehnologije T1 - Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar EP - 540 IS - 4 SP - 535 VL - 47 UR - https://hdl.handle.net/21.15107/rcub_technorep_2257 ER -
@article{ author = "Zejak, Radomir and Nikolić, Irena and Blecić, Dragoljub and Radmilović, Vuk and Radmilović, Velimir R.", year = "2013", abstract = "In this paper we have investigated the influence of synthesis parameters on the mechanical properties of the fly-ash-based geopolymer paste and mortars. Moreover, the influence of an addition of limestone sand on the microstructure of fly-ash-based geopolymers was investigated as well. An addition of limestone sand increased the compressive strength of the fly-ash-based geopolymer mortar, in comparison to the strength of the geopolymer paste, by changing the composition of the gel phase in the geopolymer structure and with the physical strengthening due to the presence of well connected grains of the sand. The results have shown that the compressive strength and Young's modulus of elasticity of the fly-ash-based geopolymer mortar are correlated. The values of these parameters increase as the alkali and silicate dosages increase. At one point, they reach the maximum values and then start to decrease. On the other hand, the parameters that considerably increase the compressive strength slightly decrease the flexural strength of the geopolymer mortar.", publisher = "Institute of Metals and Technology", journal = "Materiali in Tehnologije", title = "Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar", pages = "540-535", number = "4", volume = "47", url = "https://hdl.handle.net/21.15107/rcub_technorep_2257" }
Zejak, R., Nikolić, I., Blecić, D., Radmilović, V.,& Radmilović, V. R.. (2013). Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar. in Materiali in Tehnologije Institute of Metals and Technology., 47(4), 535-540. https://hdl.handle.net/21.15107/rcub_technorep_2257
Zejak R, Nikolić I, Blecić D, Radmilović V, Radmilović VR. Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar. in Materiali in Tehnologije. 2013;47(4):535-540. https://hdl.handle.net/21.15107/rcub_technorep_2257 .
Zejak, Radomir, Nikolić, Irena, Blecić, Dragoljub, Radmilović, Vuk, Radmilović, Velimir R., "Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar" in Materiali in Tehnologije, 47, no. 4 (2013):535-540, https://hdl.handle.net/21.15107/rcub_technorep_2257 .