Patent ID: 7041167

Claim:
A method of forming a cementitious material, comprising: preparing a formulation comprising a cementitious binder and aggregate; adding to the formulation a quantity of low density calcium silicate hydrate sufficient to reduce the curing time of the formulation as compared to an equivalent formulation without calcium silicate hydrate, wherein the low bulk density calcium silicate hydrate is added as a powder and comprises from about 0.5% to about 50% by weight of the formulation; and curing the formulation for a time sufficient to cause the material to set; wherein the formulation sets in a period of time that is at least 10% less than the time it would take an equivalent formulation without calcium silicate hydrate to set, and wherein the bulk density of the low bulk density calcium silicate hydrate is between about 0.015 g/cm 3 and about 1.5 g/cm 3 .