Admixture for hydraulic cement

  • US RE35,194 E
  • Filed: 01/12/1994
  • Issued: 04/02/1996
  • Est. Priority Date: 04/11/1983
  • Status: Expired due to Term
First Claim
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1. A hydraulic cement mix comprising hydraulic cement, aggregate, sufficient water to effect hydraulic setting of the cement, and an admixture comprising a composition or a mixture of compositions selected from the group consisting of alkali, ammonium and alkaline earth salts of thiocyanic acid, and water soluble thiosulfates;

  • a composition or a mixture of compositions selected from the group . .comprising.!. .Iadd.consisting of .Iaddend.alkanolamine; and

    . .related water soluble alkanolamines and.!. alkanolamino acids; and

    a composition or a mixture of compositions selected from the group . .comprising.!. .Iadd.consisting of .Iaddend.alkali and alkaline earth salts of nitric acid;

    said additive being present in an amount sufficient to accelerate the rate of hardening of said hydraulic cement mix and to increase its compressive strength after hardening.

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