Patent ID: 8895487

Claim:
A cement composition comprising: cement; water; and an additive, wherein the additive is a pozzolan and a strength-retrogression inhibitor, wherein the additive is a red brick powder and comprises at least the compounds silicon dioxide (SiO 2 ), iron III oxide (Fe 2 O 3 ), and aluminum oxide (Al 2 O 3 ), wherein the SiO 2 is in a concentration in the range of about 40% to about 60% of the total chemical composition of the additive; the Fe 2 O 3 is in a concentration in the range of about 15% to about 25% of the total chemical composition of the additive; and the Al 2 O 3 is in a concentration in the range of about 5% to about 15% of the total chemical composition of the additive, and wherein a mixture consisting essentially of: the additive; water; and a source of calcium develops a compressive strength of at least 500 psi (3.4 MPa) at a time of 24 hours, a temperature of 190° F. (88° C.), and a pressure of 3,000 psi (20.7 MPa).