Patent ID: 8603241

Claim:
A liquid admixture composition for enhancing water repellency in a cementitious material, comprising: a solute portion of said liquid admixture composition having at least one hydrophobic material selected from butyl stearate, butyl oleate, or mixture thereof, which is operative to enhance water repellency in cementitious material; and a non-aqueous solvent portion of said liquid admixture composition having at least one glycol ether selected from the group consisting of di(oxypropylene)glycol-t-butyl ether, di(oxypropylene)glycol-n-butyl ether, or mixture thereof, which non-aqueous solvent portion inhibits drying shrinkage in cementitious material; said solute and solvent portions being present in said liquid admixture composition in a ratio of 95:5 to 5:95; said solute and solvent portions being mixed uniformly together by dissolving said at least one hydrophobic material in said solvent before combining with a hydratable cementitious material, said solute and solvent portions of said liquid admixture composition thereby forming a non-aqueous solution or an emulsion wherein water, if present, is present as a non-continuous phase; said uniformly-mixed-together solute/solvent liquid admixture composition being effective, when combined with a hydratable cementitious material, to provide water repellency in a structure formed when the hydratable cementitious binder is combined with water and allowed to harden; and said liquid admixture composition comprising water in an amount of 0%-5% based on total weight of said liquid admixture composition.