Title

Influence of alkaline activators on the mechanical properties of fly ash based geopolymer concrete cured at ambient temperature

Publication Name

Construction and Building Materials

Abstract

In this study, cement-free geopolymer concrete (GPC) mixes are prepared using locally produced fly ash with varying NaOH concentrations (8 M−16 M), Na SiO /NaOH ratios (1.5–2.5) and alkaline activator to fly ash (AA/FA) ratios (0.4–0.6) to investigate the influence of alkaline activators on the mechanical properties of GPC cured at ambient temperatures. The optimum compressive strength (21.5 MPa) of ambient-cured GPC was attained with NaOH concentration of 14 M, Na SiO /NaOH of 1.5 and AA/FA of 0.5. The optimum flexural strength (5 MPa) of ambient-cured GPC was attained with NaOH concentration of 16 M, Na SiO /NaOH of 1.5 and AA/FA of 0.5. 2 3 2 3 2 3

Open Access Status

This publication is not available as open access

Volume

273

Article Number

121752

Funding Sponsor

Higher Education Commission, Pakistan

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Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.conbuildmat.2020.121752