Effect of Alkali-Activators on the Strength Development and Drying Shrinkage of Alkali-Activated Binder

Abstract:

The purpose of this study is to investigate the effect of various contents and modulus ratios of alkali activators on strength development and drying shrinkage of alkali-activated slag pastes. Experimental results show that the alkali-modulus ratio is the key factor influencing pH value and drying shrinkage. The lower the alkali-modulus ratio is, the higher the pH value is, and the lower the drying shrinkage is. In addition, the increase of the amount of alkali-activators decreases the initial and final setting time. The compressive strength of alkali-activated slag pastes is higher than that of Portland cement paste at all ages.

• Periodical: Advanced Materials Research (Volumes 482-484)
• Pages: 1012-1016
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.482-484.1012
• Online since: February 2012
• Authors: Mao Chieh Chi, Jiang Jhy Chang, Ran Huang, Zai Long Weng
• Keywords: Activators, Alkali-Activated Slag, Drying Shrinkage, Strength Development

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