IntroductionStanton studied in 1940 the Parker Davis dam in California, which showed cracking and expansion. As a result of his study, Stanton concluded that the damage was due to an interaction between aggregates (altered andesites and rhyolites) and the alkalis of the concrete pore solution (Poole, 1992).Since Stanton's discovery the knowledge of alkali-aggregate reaction (AAR) has progressed but still
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