Determination of Corrosion Resistance of Shotcrete as a Protective Coating of Concrete and Reinforced Concrete Structures
The analy sis of scientific, technical and normativ e literature on the use of shotcrete shows that f ocusing on high strength and water tightness, theauthors state that the shotcrete hashigh corrosion resistance. The presented test results do not alway s conf irm this position. Insuf f icient study of the corrosion properties of shotcrete limits the scope of its application notonly f or concreting new structures, but also f or repair work. For the use of shotcrete as a protection of reinf orced concrete structures against aggressiv e impacts of the env ironment,data on its sulf ate resistance and dif f usion permeability f or chlorides as the most aggressiv e media are required. On the basis of the perf ormed studies of shotcrete in sulf ate and chloridemedia, the normalized parameters of shotcrete of increased corrosion resistance were determined. The data obtained make it possible to consider shotcrete as an ef f ective protectionof concrete and reinf orced concrete structures against corrosion in sulf ate and chloride media.