Rehabilitation of Concrete Surfaces of Hydropower Engineering Structures Deteriorated by Soft Corrosion and Cavitation

摘要

This paper covers the results of study of the reasons explaining why soft corrosion and cavitation-induced erosion take place on the surfaces of the hydropower engineering structures made from concrete. The study suggested defining basic characteristics related to a proper choice of mix design of the alkaline aluminosilicate coatings in terms of high adhesion, strength and resistance of the protective coating to exposure of water flow. The results of study showed that during a period under review (6 months) the developed coatings had a coefficient of resistance from 1.03 to 1.09 and could provide a reliable protection of the concrete from being leached.