Abstract
Antiwashout underwater concrete needs large amount of unit water-content than that of conventional concrete, because of developing an appropriate fluidity according to the condition of a site. As the excessive water content in a concrete mixture is not desierable to control thermal cracks and to make economic concrete, superplastisizer are used in the antiwashout underwater concrete to reduce unit water content. In some case, mineral admixtures such as blastfurnace slag and fly ash are used too. However, lime stone powder is not used so far. This paper reports the fluidity, setting, strength development, permeability, chloride penetration effected by lime stone powder used in the antiwashout underwater concrete.
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