RAW MIX FOR PROTECTIVE COATING Russian patent published in 2017 - IPC C04B28/04 C04B22/06 C04B14/26 C04B111/34 

FIELD: construction.

SUBSTANCE: raw mix for protective coating containing portland cement, a filler, fine limestone, additives and water, consists of sand with a fraction of 0.315 mm as a filler, of fine limestone with a specific surface area of 260 m²/kg, additive with a density of 1.032 g/cm³ and a pH value of 6.0 which includes aluminium hydroxide sol, silicic acid sol and water in the following mass ratio, wt %: aluminium hydroxide sol 30-38; silicic acid sol 40-50; water 17-20. The raw mix has the following mass ratio, wt %: portland cement 31.4-36.0; specified sand 40.0-40.6; specified limestone 6.0-6.5; specified additive 1.0-1.1 and water 17.0-17.7.

EFFECT: improved crack resistance and increased adhesive strength of the protective coating to the surface of the rock.

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