RAW MATERIAL MIX FOR PROTECTIVE COAT OF CONCRETE SURFACE Russian patent published in 2007 - IPC C04B41/65 

FIELD: manufacture of building materials; protection of concrete surfaces in industrial and civil construction engineering.

SUBSTANCE: proposed raw material mix contains cement, sand, complex additive and water; it additionally contains montmorillonite clay at specific surface S_sp. no less than 150 m²/kg; complex additive contains at specific surface S_sp. equal to 2000 m²/kg, additive TSMID-4; 20-% solution of ortho-silicic acid sol at pH of 3-4 at the following ratio of components, mass-%: cement, 23.00-28.81; sand, 59.00-64.00; montmorillonite clay at specific surface of S_sp. no less than 150 m²/kg, 0.69-0.83; micro-silica at specific surface S_sp. equal to 2000 m²/kg, 1.16-1.30; additive TSMID-4, 0.19-0.22; 20-% solution of ortho-silicic acid sol at pH of 3-4, 0.14-0.17; water, 10.01-10.48.

EFFECT: enhanced compressive strength, adhesion strength and water-tightness.

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