Patent ID: 8759423

Claim:
A stable additive in aqueous carrier composition for modifying cementitious compositions, comprising: water and a) at least one water-dispersible defoamer comprising polyalkylene oxide, said at least one water-dispersible defoamer having a turbidity value greater than 50 NTU when measured by turbidimeter at 20° C at concentration level of 0.2% based on total weight of the aqueous carrier; b) at least one polycarboxylate cement dispersant having polyethylene oxide groups, polypropylene oxide groups, or mixture thereof; and c) colloidal nano-particles having a Z-average size of 8-150 nanometers and being selected from the group consisting of silica, alumina, zinc oxide, tin oxide, cerium oxide, zirconia, and mixtures thereof; said collidal nano-particles being effect to stabilize the at least one water-dispersible defoamer and the at least one polycarboxylate cement dispersant when combined within the aqueous carrier composition.