期刊
CERAMICS INTERNATIONAL
卷 42, 期 2, 页码 3000-3006出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.10.084
关键词
Geopolymer; Silica fume; Fly ash; Compressive strength; Flexural strength
资金
- Federal government of Nigeria through TET FUND
In this paper fly ash based geopolymer concretes with different percentages of silica fume were made by using NaOH/sodium silicate and cured in an oven at 100 degrees C. Workability, compressive strength, flexural and tensile strengths were determined. Portland cement concrete was used as a reference. Sodium hydroxide (14 M) and sodium silicate were used as alkali activators. The results have shown that addition of silica fume improved the compressive strength of the produced geopolymer concretes. Tensile and flexural strengths also increased as the silica fume content increased. The geopolymer concretes were found quite durable in the presence of 2% H2SO4, 5% Na2SO4 and 5% NaCl. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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