WATERPROOF COMPOUND USED FOR CONCRETE SURFACE TREATMENT Russian patent published in 2009 - IPC C04B41/65 

FIELD: construction industry.

SUBSTANCE: waterproof compound used for concrete surface treatment and consisting of portland cement, quartz sand, sodium nitrate, and sodium sulphate, contains quartz sand with specific surface area of 3500-4500 cm²/g and additional sodium silicate block with specific surface area of 4000-5000 cm²/g, sodium chloride, calcium nitrate, sodium carbonate, microsilica, and superplasticising agent C-3 at the following component ratio, wt %: portland cement - 55.0-70.0, the above quartz sand - 10.0-15.0, sodium nitrate - 1.7-3.0, sodium sulphate - 1.7- 3.0, sodium chloride - 0.2-0.5, the above silicate block - 7.0-10.0, microsilica - 4.0-12.0, superplasticising agent C-3 - 0.5-0.8, calcium nitrate - 2.0-2.2, and sodium carbonate - 1.7-2.5.

EFFECT: improving cold-resistance and waterproofness of concrete coated with waterproof compound.

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