Additive for Slag Cement, Slag Cement and Slag Concrete thereof

摘要

The present invention relates to a slag cement admixture for improving the early strength of slag cement mixed with Portland cement and blast furnace slag fine powder, and slag cement and slag concrete using the admixture for slag cement. The admixture for slag cement according to the present invention comprises: an alkali aluminate; Alkaline carbonates; Alkali sulfates; And calcium silicate. Such an admixture for slag cement comprises 3 to 15% by weight of an alkali aluminate; 5 to 18% by weight of an alkaline carbonate; 15 to 45% by weight of alkali sulfate; 35 to 77% by weight of calcium silicate. The slag cement according to the present invention usually comprises 17 to 65% by weight of Portland cement; 34.5 to 80% by weight of fine blast furnace slag powder; And 0.5 to 3.0% by weight of an admixture for slag cement; and the slag concrete according to the present invention comprises the slag cement as a binder in a concrete mix.