CEMENT-POLYMER MIXTURE FOR ANTICORROSION AND ABRASIVE PROTECTION OF INNER SURFACES OF STEEL PIPES OF HEAT AND WATER SUPPLY SYSTEMS Russian patent published in 2014 - IPC F16L58/06 C04B28/02 C04B111/72 

FIELD: chemistry.

SUBSTANCE: invention relates to cement mixtures with additives, used for anticorrosion protection of inner surfaces of steel pipes of heat and water supply systems. The composition contains the following (wt %): mineral binder 37-50, sand 32-40, polymer additive 1.5-4.5, complex mobility regulator 0.18-0.42 and water (the balance).

EFFECT: use of the disclosed composition guarantees high crack-resistance and adhesion strength of the coating of the metal surface with longevity of not less than 10 years; the invention enables to obtain coatings with the highest possible dense packing with average density of not less than 2200 kg/m³, which enables to achieve relatively high physical-mechanical characteristics of the protective layer on all disclosed quality parameters.

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