Patent ID: 11912927
Assignee: BROOKHAVEN SCIENCE ASSOCIATES, LLC
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  Y | IPC C

Claim 10:
11. A method of making a well cement composite comprising:
mixing polymethylhydrosiloxane (PMHS) with an aqueous solution of sodium metasilicate (SMS) to form an emulsion;
mixing fly ash cenospheres (CS) into the emulsion to release hydrogen gas and form a paste;
adding calcium aluminate cement (CAC) and water to the paste and mixing to form the well cement composite,
wherein the well cement composite comprises calcium aluminate cement (CAC) and fly ash cenospheres (CS) in a weight ratio of from 30:70 to 80:20 CAC to CS, sodium metasilicate (SMS) in an amount of from 1 to 10% of the total weight of CAC and CS, polymethylhydrosiloxane (PMHS) in an amount of from 0.5 to 6.0% of the total weight of CAC and CS, and water in a weight ratio of from 0.5:1.0 to 1.2:1.0 of water to CAC and CS.