Alkali-Silica Reaction - 40 Years Later


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Title: Alkali-Silica Reaction - 40 Years Later

Author(s): Lewis H. Tuthill

Publication: Concrete International

Volume: 4

Issue: 4

Appears on pages(s): 32-36

Keywords: alkali-aggregate reactions; alkalies; cement-aggregate reactions; chemical attack; crack-ing (fracturing); failure; high-alkali cements; opal; quartz; silica gel; siliceous aggregates; weathering.

Date: 4/1/1982

Describes highlights of the discovery of and experience with alkali-slilica reaction (ASR) since its identification 40 years ago. Special cases involving unusual materials are noted. Termination of significant ASR in three southwest arch dams, without diminishing the serviceability of interior concrete, is reported. Avoiding the problem by use of an acceptable as well as economic aggregate is discussed.