Cement dispersants and method of producing concrete by using same

摘要

A cement dispersant composed of water-soluble vinyl copolymers which include specified kinds of constituent units at specified ratios and of which the weight average molecular weight pullulan converted by GPC method is 15000-150000 and the ratio of weight average molecular weight to number average molecular weight is 2-7 is used together with cement, aggregates and water to produce concrete with the water-to-cement ratio of 20-45%.