2019 CSCE Annual Conference - Laval (Greater Montreal)

2019 CSCE Annual Conference - Laval (Greater Montreal) Conference


Title
Effect of Sodium Oxide on the Properties of Alkali-Activated Slag Mortars

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Author(s)
Ms. Wala'a Almakhadmeh, Concordia University (Presenter)
Dr. Ahmed Soliman, Concordia University
Abstract

W. Almakhadmeh1 and A.M. Soliman2

1. PhD student, Department of Building, Civil and Environmental Engineering,

 Concordia University, Montreal Quebec Canada

2. Assistant Professor, Department of Building, Civil and Environmental Engineering,

 Concordia University, Montreal Quebec Canada

Despite the promising mechanical and eco-friendly performance of alkali activated slag (AAS), shrinkage of AAS is considered as the most significant challenges hindering its implementation. It seems that there is a clear gap between the measured performance inside the lab and actual performance in-situ of alkali-activated materials. Shrinkage cracking can dramatically reduce the durability of any concrete member. Hence, a comprehensive understanding of the mechanism of the shrinkage in AAS, and effectiveness of different mitigation techniques are essential to prevent these damages in future. In this paper, an overview is presented on the mitigation strategies and their effectiveness in reducing AAS shrinkage. This would allow engineers to select the suitable mitigation technique for different applications.

Key Words: Alkali activated slag; shrinkage, mitigation techniques