Sorptivity as a Measure of Salt Frost Scaling Resistance of Air-Entrained Concrete

Abstract:

Salt frost scaling is the progressive deterioration of the concrete surface associated with freezing and thawing in the presence of a salt solution. Its major mechanism has been confirmed to be cryogenic suction that promotes continuous ice growth in the surface region. In this paper, salt frost scaling of different air-entrained concretes is investigated, alone with the room-temperature sorptivity measurement. A clear correlation is found between the two properties, which is supported by a theoretical analysis on the sorptivity. These findings explain why HPC of low w/b ratio and associated low capillary porosity has much improved scaling resistance. Similar benefits are obtained for regular w/b ratio concrete containing high cementitious replacement level of slag cement.

• Periodical: Key Engineering Materials (Volumes 629-630)
• Pages: 195-200
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.629-630.195
• Online since: October 2014
• Authors: Zhi Chao Liu*, Will Hansen
• Keywords: Air-Entrained Concrete, Crogenic Suction, Salt Frost Scaling, Sorptivity

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