Abstract
The underwater casting of relatively thin lifts of concrete in water requires the proportioning of highly flowable concrete that can resist water dilution and segregation and spread readily into place. This paper describes an investigation conducted to examine the effects of anti-washout admixture concentration, water-cementitious materials ratio, and binder composition on the washout resistance of highly flowable concrete. The data presented is important given the increasing demand to secure quality repairs underwater and the higher environmental constraints to limit water pollution caused by such operations.
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