Abstract: The present invention is directed to a defoaming agent for use with polycarboxylate based admixtures for concrete. The defoaming agent is comprised of tributyl phosphate, an alkylaryl sulfonic acid metallic salt and a modified alkylpolyalcoxy ester. Tributyl phosphate is a phosphate ester based defoamer and the modified alkylpolyalcoxy ester is an air detraining agent. The alkylaryl sulfonic acid metallic salt is used as a hydrotrope to ensure that the tributyl phosphate and the modified alkylpolyalcoxy ester react and do not separate.

Abstract: An admixture which delays the setting of concrete within a ready-mix truck is disclosed. The admixture is comprised of a mixture of glucono delta lactone and cornstarch and produces exceptional retarding results at a reasonable cost. The corn starch is relatively inexpensive and is used as a filler material to reduce the overall cost of the admixture.

Abstract: The present invention is directed to a defoaming agent for use with polycarboxylate based admixtures for concrete. The defoaming agent is comprised of tributyl phosphate, an alkylaryl sulfonic acid metallic salt and a modified alkylpolyalcoxyester. Tributyl phosphate is a phosphate ester based defoamer and the modified alkylpolyalcoxyester is an air detraining agent. The alkylaryl sulfonic acid metallic salt is used as a hydrotrope to ensure that the tributyl phosphate and the modified alkylpolyalcoxyester react and do not separate.

Abstract: A corrosion inhibiting admixture for concrete is disclosed comprising a combination of organic (amines) and inorganic (nitrites) fractions that provide a synergistic effect when present at a specific ratio. Such a synergistic effect occurs when the amine:nitrite ratio (% by weight) is between 1.5 to 2.5 resulting in the admixture providing excellent corrosion inhibiting capabilities.

Abstract: The thixotropic reaction that takes place in an aqueous dispersion of micro silica is delayed by the addition of a pre-determined amount of at least one chemical additive selected from the group consisting of amides, such as carbamide, or polyols, such as glycerol and propylene glycol.

Abstract: A hydraulic cement mix comprising a hydraulic cement, aggregate in an amount of up to 80% by weight based upon the total weight of said cement mix, sufficient water to effect hydraulic setting of the cement, and an air-entraining additive consisting essentially of a coconut fatty acid diethanolamine produced by reacting alkyl ester of coconut acid with diethanolamine, a capramide diethanolamide and ricinoleic acid, said additive being in an effective amount whereby air will be entrained in said mix in an amount of 3% to 9% by volume of said mix.

Abstract: A hydraulic cement mix comprising a hydraulic cement, aggregate in an amount of up to 80% by weight based upon the total weight of said cement mix, sufficient water to effect hydraulic setting of the cement, and an air-entraining additive consisting essentially of a coconut fatty acid diethanolamine produced by reacting alkyl ester of coconut acid with diethanolamine and a capramide diethanolamide, said additive being in an effective amount whereby air will be entrained in said mix in an amount of 3% to 9% by volume of said mix.

Abstract: A hydraulic cement mix comprising a hydraulic cement, aggregate in an amount of up to 80% by weight based upon the total weight of said cement mix, sufficient water to effect hydraulic setting of the cement, and an air-entraining additive consisting essentially of a coconut fatty acid diethanolamide produced by reacting alkyl ester of coconut acid with diethanolamine, said additive being in an effective amount whereby air will be entrained in said mix in an amount of 3% to 9% by volume of said mix.