EXPANSIVE ADMIXTURE FOR RESIN-FINISHED FLOOR, AND ITS USE

摘要

PROBLEM TO BE SOLVED: To provide an expansive admixture used for concrete for a floor to be subjected to resin finishing, which does not cause fine blistering damaging the fine appearance of a rein-finished face even in the case the initial temperature in the curing of concrete is lower than 10°C, and to provide concrete for a floor including the expansive admixture. SOLUTION: The expansive admixture is used for concrete for a floor to be subjected to resin finishing, and the content of expansive substance with a particle diameter of >150μm is≤1 mass%. In the expansive substance, preferably, the Blaine specific surface area is≤5,700 cm2/g, and, the amount to be used is 10 to 100 kg/m3. More preferably, the Blaine specific surface area is≤4,000 cm2/g, the content of the expansive substance with a particle diameter of >150μm is≤0.5 mass%, and the content of the expansive substance with a particle diameter of >125μm is≤1 mass%. The concrete for a floor uses the same. COPYRIGHT: (C)2007,JPO&INPIT