CEMENT ADDITIVE AND CEMENT COMPOSITION

摘要

A cement additive which functions to inhibit an industrial waste and a hardened cementitious material from generating a monosulfate. It comprises calcium carbonate, plaster, and coal ash and/or blast furnace slag particles. This additive enables an industrial waste to be effectively utilized and can give a hardened cementitious material inhibited from generating a monosulfate therein. Thus, a hardened cementitious material having satisfactory durability (resistance to sulfates) can be produced.