FIELD: machine building.
SUBSTANCE: pipeline sanation method involves cleaning of inside surfaces of a pipeline, formation of high-elasticity polymer coating on the cleaned surface and application of a concrete coating to it. High-elasticity polymer coating is formed by application to the pipeline inside surface of the composition that contains emulsion and is further cured. Oligomers with end isocyanate groups are disperse medium in the emulsion, and a solution or a dispersion that has been obtained as a result of mixing lime solution with content of calcium hydrate 10-70 wt %, and glycerin in the amount of 1-250 parts by weight per 100 parts by weight of calcium hydrate is a disperse phase.
EFFECT: enhancing adhesion to wet metal or concrete surfaces, reducing the thickness and improving the strength of concrete coating.
7 cl, 2 dwg
