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

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 sca...

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Bibliographic Details
Published in:Key engineering materials 2014-10, Vol.629-630, p.195-200
Main Authors: Liu, Zhi Chao, Hansen, Will
Format: Article
Language:English
Subjects:
Capillarity
Cements
Concretes
Deterioration
Frost
Level (quantity)
Melting
Porosity
Slag cements
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Summary: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.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.629-630.195