Concrete mixtures having aqueous foam admixtures
First Claim
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1. A concrete mixture, comprising:
- (i) a hydraulic cement;
(ii) a hydration stabilizer that inhibits hydration of the hydraulic cement;
(iii) water;
(iv) a foam comprising water, a foaming agent, and a surfactant, wherein the foam is stabilized in the presence of the hydraulic cement by the hydration stabilizer.
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Abstract
Flowable concrete mixtures have an aqueous foam admixture mixed therein to give the concrete mixture desired strength, flowability, and density. The concrete mixtures include a hydration stabilizer to stabilize the aqueous foam. The hydration stabilizer inhibits the reaction between the hydraulic cement and the water in the aqueous foam. The aqueous foam can be further stabilized using a fluorochemical surfactant. Preferred fluorochemical surfactants comprise an oligomer having at least one hydrophilic nonionic monomer and at least one hydrophilic anionic monomer.
52 Citations
42 Claims
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1. A concrete mixture, comprising:
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(i) a hydraulic cement;
(ii) a hydration stabilizer that inhibits hydration of the hydraulic cement;
(iii) water;
(iv) a foam comprising water, a foaming agent, and a surfactant, wherein the foam is stabilized in the presence of the hydraulic cement by the hydration stabilizer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A concrete mixture, comprising:
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(i) a hydraulic cement;
(ii) a hydration stabilizer that inhibits hydration of the hydraulic cement;
(iii) water;
(iv) a dispersant;
(v) aggregate; and
(vi) a foam comprising water, a foaming agent, and a fluorochemical surfactant, wherein the foam comprises a plurality of air bubbles that are stabilized by the fluorochemical surfactant, the fluorochemical surfactant comprising an oligomer having at least one hydrophilic nonionic monomer or at least one hydrophilic anionic monomer. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for stabilizing a foam in a concrete mixture, comprising:
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(i) providing an aqueous foam admixture comprising a plurality of air bubbles;
(ii) providing a cementitious mixture comprising hydraulic cement, water, and aggregate; and
(iii) mixing together the cementitious mixture, the aqueous foam admixture and a hydration stabilizer, wherein the hydration stabilizer inhibits the destruction of the air bubbles by the hydraulic cement. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification