Patent ID: 8043425
Filing Date: 2011-10-25
Classification: C04B,Y02W,Y10S

Abstract:
1. A mixture comprising in proportions by mass: from 0.4 to 4% of one or more materials in the ultrafine particle size range, constituted by particles with a D90 smaller than 1 μm and/or with a specific BET surface area greater than 6 m from 1 to 6% of Portland cement; from 8 to 25% of one or more materials in the fine particle size range, constituted by particles the D10 and the D90 of which are comprised between 1 μm and 100 μm and with a specific BET surface area of less than 5 m from 25 to 50% of one or more materials in the medium particle size range, constituted by particles the D10 and the D90 of which are comprised between 100 μm and 5 mm; and from 25 to 55% of one or more materials in the larger particle size range, constituted by particles the D10 of which is greater than 5 mm, wherein the ultrafine particle size range is constituted by one or more materials selected from the group consisting of silica fume, limestone powder, precipitated silica, precipitated carbonate, pyrogenated silica, natural pozzolan, pumice stone, ground fly ash, hydrated or carbonated siliceous hydraulic binder grind, and mixtures or co-grinds thereof, in dry form or aqueous suspension.