The influence of calcium compounds (CaO and Ca(OH)2) on the mechanical properties of fly ash based geopolymers has been studied. Calcium compounds were substituted in fly ash at 1, 2 and 3 wt%, respectively. Curing of the geopolymers was performed at ambient temperature (20 °C) and 70 °C. Addition of calcium compounds as a fly ash substitute improved mechanical properties for the ambient temperature cured samples while decreasing properties for the 70 °C cured samples. Seven days compressive strength of the ambient temperature cured samples increased from 11.8 (2.9) to 22.8 (3.8) MPa and 29.2 (1.1) MPa for 3% CaO and 3% Ca(OH)2 additions, respectively. © 2008 Elsevier B.V. All rights reserved.
CITATION STYLE
Temuujin, J., van Riessen, A., & Williams, R. (2009). Influence of calcium compounds on the mechanical properties of fly ash geopolymer pastes. Journal of Hazardous Materials, 167(1–3), 82–88. https://doi.org/10.1016/j.jhazmat.2008.12.121
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