COMPLEX ADDITIVE FOR CONCRETE AND MORTARS Russian patent published in 2006 - IPC C04B22/12 C04B24/02 C04B103/14 

FIELD: construction engineering; manufacture of building materials.

SUBSTANCE: proposed complex additive includes calcium chloride and polyalcohols; it additionally includes sodium nitrite and water at the following ratio of components, mass-%: calcium chloride, 25-30; polyalcohols, 0.3-1.0; sodium nitrite, 12-16; the remainder being water. Proposed additive may additionally contain ligno-sulfonate in the amount of 0.2-1 mass-% or antacidin at mass ratio of antacidin to calcium chloride of 0.001-0.0015:1; glycerin is used as polyalcohol. The following ratio of components is preferable, mass-%: calcium chloride, 30; sodium nitrite, 15; glycerin, 0.35; ligno-sulfonate, 0.25; the remainder being water. As a result, gain in strength is obtained both in early and later hardening terms.

EFFECT: enhanced plasticity of concrete mix; possibility of operating at negative ambient temperatures.

5 cl, 4 tbl