Evidence in Washington of Deterioration of Concrete Through Reactions between Aggregates and High-Alkali Cements
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Deterioration of concrete in two areas in Washington described. Unsatisfactory results are connected definitely with combinations of certain aggregates and cements. The aggregates when used with other cements and the cements when used with other aggregates have produced concrete of satisfactory durability. Evidence indicates that, with these aggregates the cements that were used in durable concrete were low in alkali and those used in concrete which ha! deteriorated were high in alkali. Investigations have not been completed, however, and there is some evidence of a negative nature.