The dissertation is devoted to the development of electrically conductive silicate
composition and improvement of screen protection against electrocorrosion of reinforced concrete and concrete structures, in particular, high passenger platforms, overpasses, bridges operated on sections of railways electrified by direct current. As a result of a theoretical research author developed the view about electrocorrosion of reinforced concrete and concrete structures. Author cpecified a scheme and a mechanism of leakage current transmission through high passenger platforms structures, author defined 4 types of structures zones, in which electrocorrosion process reactions happen. Silicate composition, that was proposed, is сonsisted of sodium silicate andsodium silicon fluoride, its conductivity is provided by graphite filler, and its water resistance is provided by adding a main blast furnace granular slag. Author defined, that the main product of a hydration is a silicic acid gel, and a water resistance of this acid can raise at the expense of alkaline and alkaline earth hydroaluminosilicates, calcium hydroaluminates and calcium fluoride origination, that create water resistant electroheterogeneous contacts, when it reacts with silica gel particles. Cathode and anode electrochemical reactions, which were defined, occur on a distribution boundary between a graphite and a silicate component of the composition. Author showed, that the synthetic stone durability by an electrical conductivity will be conditioned by a quantity of an electric current, that can pass through graphite particles. As a result of an experimental research, author determined, that electrophysical characteristics of silicate compositions, which contains graphite, are in an antagonism with hydrophysical and physical and mechanical qualities. So, development of these compositions needs usage of compromise optimization methods.Author defined, that electrophysical, hydrophysical and physical and mechanical qualities of compositions depend on content of sodium silicate, graphite and slag. Author experimentally researched efficiency indicators of grounded screens, which are made of electrically conductive silicate composition. Author defined, that these screens can drain leakage currents and reduce power of current, that goes through a concrete and an armature by 70 %. Author developed conductive compositions, that were patented. Creator improved constructive and technological solution to protect supports of a high passenger platform with a grounded screen. The research results were implemented in experimental order during capital repair of the high passenger platform at the railway station of Komarivka belonging to the regional branch “The South Railway” of the JSC “Ukrainian railways”.
