Slag cement based hydraulic binder using a ternary system for acceleration containing no chlorides, for the preparation of mortar and concrete

摘要

Slag cement based hydraulic binder contains an acceleration additive that is a ternary system made up of: (a) an alkali metal hydroxide which provides with the water in the binder a molar concentration of the hydroxide of 0.05N to 0.60N, preferably 0.20N to 0.40N; (b) an alkali metal sulphate to provide a concentration of 0.2 to 3 wt.% of the slag cement; (c) a source of calcium sulfate such that the sulfate (CaSO4) content in the slag cement is 2 to 7 wt.%. Independent claims are also included for: (i) a mortar or concrete containing granulates and this hydraulic binder; (ii) production of this hydraulic binder.