Properties of Geopolymer Concrete with Fly Ash as Source Material: Effect of Mixture Composition

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Title: Properties of Geopolymer Concrete with Fly Ash as Source Material: Effect of Mixture Composition

Author(s): D. Hardjito, S. E. Wallah, D. M. J. Sumajouw, and B. V. Rangan

Publication: Special Publication

Volume: 222

Issue:

Appears on pages(s): 109-118

Keywords: compressive strength; fly ash; geopolymer concrete; mixture composition

Date: 5/1/2004

Abstract:
This paper presents the effect of mixture composition on the compressive strength of fly ash-based geopolymer concrete. Test results show that water-to-sodium oxide (H2O-to-Na2O) molar ratio and the water-to-geopolymer solids ratio by mass influence the compressive strength of fly ash-based geopolymer concrete. The compressive strength decreases when these ratios increase. However, the sodium oxide-to-silicon oxide (Na2O-to-SiO2) molar ratio of the geopolymer mixture does not have any significant effect on the compressive strength within the range of 0.095 and of 0.120 of this ratio.