RAW MIX FOR PROTECTIVE COATING Russian patent published in 2017 - IPC C04B28/04 C04B41/65 C04B22/06 C04B22/08 C04B111/20 

FIELD: construction.

SUBSTANCE: raw mix for the protective coating consisting of Portland cement, a filler, fine limestone, additives and water, contains sand with a fraction of 0.315 mm as a filler, fine limestone with a specific surface area of 260 m²/Kg, an additive with a density of 1.027 g/cm³ and a pH value of 8.5, consisting of aluminium hydroxide sol, aluminium sulfate and water in the following ratio, wt %: aluminium hydroxide sol 50-55, aluminium sulfate 30-33, water 15-17. Wherein the raw mix has the following ratio, wt %: Portland cement 36.5-37.9, specified sand 36.0-36.5, specified limestone 7.75-8.12, specified additive 0.15-0.18 and water 18.2-18.7.

EFFECT: increased bending tensile strength.

1 tbl