RAW MIXTURE FOR PROTECTIVE COATING Russian patent published in 2018 - IPC C04B41/50 C04B28/04 

FIELD: construction materials.

SUBSTANCE: invention relates to construction materials and can be used for protection of various surfaces. Raw mixture for a protective coating contains, wt %: portland cement 34.1–36.4; sand of fraction 0.30 mm 35.2–36.2; magnesia limestone with a specific surface of 250 m²/kg 7.8–8.2; a complex additive 2.6–2.8; water 18.0–18.7. Complex additive contains, wt %: a redispersible powder based on styrene acrylate copolymer Acronal 430 38.0–42.0; iron hydroxide sol with a density of ρ = 1.107 g/cm³ and pH = 9 39.0–40.0; natural shungite with silica particle size SiO₂ of 10 nm 3.0–5.0; sodium nitrite 16.0–17.0.

EFFECT: technical result is an increase in compressive strength and chemical resistance.

1 cl, 1 ex, 1 tbl