Effects of Fly Ash/Slag Ratio and Liquid/Binder Ratio on Strength of Alkali-Activated Fly Ash/Slag Mortars

Abstract:

The purpose of this study is to investigate the effects of fly ash/slag ratio and liquid/binder ratio on strength of alkali-activated fly ash/slag (AAFS) mortars. Three liquid/binder ratios of 0.35, 0.5 and 0.65 and three fly ash/slag ratios of 100/0, 50/50, and 0/100 were selected as variables to design and produce mixes of AAFS mortars. The compressive strength and flexural strength of alkali-activated fly ash/slag mortars were discussed and compared with reference mortars produced using ordinary Portland cement (OPC) mortars. Based on the results, both fly ash/slag ratio and the liquid/binder ratio are significant factors influencing the strengths of AAFS mortars. The strength of AAFS mortars except alkali-activated fly ash mortars is higher than that of OPC mortars. When the fly ash/slag ratio reaches 50/50, the AAFS mortars possesses the highest strength compared with the other mortars.

• Periodical: Applied Mechanics and Materials (Volume 377)
• Pages: 50-54
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.377.50
• Online since: August 2013
• Authors: Mao Chieh Chi, Yen Chun Liu
• Keywords: Alkali-Activated Fly Ash/Slag Mortars, Fly Ash/Slag Ratio, Liquid/Binder Ratio, Strength

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