GLASS FOR CEMENTING MATERIAL

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The invention relates to a powder material including grains of an activating glass including : at least 20 wt % of SiO2; more than 20 wt % and less than 50 wt % of an alkaline oxide selected from among Na2O, Li2O or K2O; 0.1 to 60 wt % alkaline-earth oxide selected from among CaO or MgO; and at least one of the following two ingredients a) and b) : a) grains of a cement selected from among Portland cement, aluminous cement, sulfo-aluminous cement, and quick-setting cement; and b) grains of a solid inorganic compound, the sum of the silica, alumina, and alkaline-earth oxide contents of which is more than 50 wt % and which contains less than 20 wt % of an alkaline oxide. The activating glass enhances the developmental kinetics of the mechanical properties of the hardened hydrated material made from the hydraulic binder powder material.