ADDITIVE FOR CONCRETE

摘要

PROBLEM TO BE SOLVED: To provide a concrete additive which is easily handleable and produced by using a powdery inorganic admixture as a raw material. SOLUTION: The production process of this concrete additive comprises adding a dispersant to a powdery inorganic admixture such as fumed silica and granulating the resulting mixture, or preferably, comprises: adding a dispersant and a coarse-grained powdery inorganic admixture having a 1μm to 5 mm average grain size to a powdery inorganic admixture having a <=1μm average grain size; and granulating the resulting mixture to produce the objective concrete additive.