Patent ID: 8092590

Claim:
A mineral hydraulic binder for producing concretes, mortars, or cement suspensions, based on at least one cement, the binder comprising at least one finely divided SiO 2 component in the form of precipitated silica having agglomerate particles with particle diameters (d 95 ) in the range from 3 to 15 μm and from 94 to 99% SiO 2 by weight, pyrogenic silica having primary particles with particle diameters (d 95 ) in the range from 0.007 to 0.04 μm and from 96 to 100% SiO 2 by weight, or a mixture thereof; and at least one finely divided CaO component in the form of white fine lime or hydraulic calcined lime with particle diameters (d 95 ) in the range from 0.5 to 100 μm, white slake lime or hydraulic slake lime with particle diameters (d 95 ) in the range from 0.7 to 100 μm, or a mixture thereof; wherein the SiO 2 and CaO components react with make-up water added to the cement to form calcium silicate hydrate phases that cure as a result of a pozzolanic reaction and produce early strength; wherein the cement includes clinker phases selected as one from the group of C 3 S, C 2 S, C 3 A, and C 4 AF; and if appropriate, secondary constituents which on reaction with water form hydrate phases that cure to form hardened cement after the occurrence of a delay phase upon mixing with water, during which time no appreciable curing reaction takes place; wherein the SiO 2 and CaO components react with the make-up water during said delay phase.