Patent ID: 8747550
Filing Date: 2014-06-10
Classification: C04B

Abstract:
1. A pre-blended dry mortar mix consisting essentially of a cementitious material, an aggregate, and a dry water-repellent admixture, wherein said water-repellent admixture contains (i) at least one stearate selected from the group consisting of calcium stearate, aluminum stearate, zinc stearate, sodium stearate, and magnesium stearate; and (ii) at least one oleate selected from the group consisting of sodium oleate, potassium oleate, magnesium oleate, and calcium oleate, wherein said water-repellent admixture has a stearate/oleate mass ratio of from 2 to 10; wherein said water-repellent admixture is present in said dry mortar mix in a dosage from about 0.10% to about 0.50% by weight of said dry mortar mix; wherein said dry mortar mix is combinable with water to form a masonry mortar, which is curable to form a hardened mortar; and wherein said dry mortar mix is characterized by the following properties: (a) water demand of said dry mortar mix, to form said masonry mortar, is within 5% of water demand of a dry mortar mix that does not contain said water-repellent admixture; (b) air content of said masonry mortar is within about 3 percentage points (on a volume basis) of air content of a masonry mortar that does not contain said water-repellent admixture; (c) said hardened mortar has water uptake of about 50% or less of water uptake of a blank mortar that does not contain said water-repellent admixture, when tested in accordance with ASTM C1403; and (d) said hardened mortar has compressive strength within about 15% of compressive strength of a blank mortar that does not contain said water-repellent admixture.