Effects of Moisture, Temperature, and Freezing and Thawing on Alkali-Silica Reaction

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Title: Effects of Moisture, Temperature, and Freezing and Thawing on Alkali-Silica Reaction

Author(s): Richard A. Deschenes Jr., Eric R. Giannini, Thanos Drimalas, Benoit Fournier, and W. Micah Hale

Publication: Materials Journal

Volume: 115

Issue: 4

Appears on pages(s): 575-584

Keywords: alkali-silica reaction (ASR); freezing and thawing (F/T); mitigation; relative humidity (RH); silane; wetting and drying

Date: 7/1/2018

Abstract:
Alkali-silica reaction (ASR) and freezing and thawing (F/T) deterioration reduce the service life of concrete. The influence of relative humidity (RH), temperature, wetting-and-drying (W/D), and F/T on the development of ASR were evaluated herein. These factors exacerbate concrete deterioration, and understanding the relationship between moisture and deterioration is necessary for mitigation. The results of this study confirm a relationship between deleterious expansion and environmental conditions such as moisture and temperature. The results confirm the aggravating effect of F/T on ASR. The results indicate that sufficient drying may prevent both ASR and F/T deterioration in non-air-entrained concrete. Silane was evaluated as a mitigation measure for concrete exposed to a combination of ASR, F/T, and W/D and found to increase drying.