Prospects for the use of steel reinforcement with protective coatings in reinforced concrete structures

Abstract

Introduction. Corrosion of steel reinforcement is one of the main factors of destruction of reinforced concrete structures exposed to aggressive environment. The use of steel reinforcement with protective coatings applied to its surface in factory conditions is one of the important directions in the creation of durable reinforced concrete structures.Aim. To show possible prospects for the use of various reinforcement protective coatings in Russia to increase the durability of reinforced concrete structures under the influence of aggressive environment. To develop proposals on the need to carry out research work to create a regulatory base and introduce into practice the construction of reinforcement with a protective coating.Materials and methods. The determination of the prospects for the use of protective coatings of reinforcement in reinforced concrete structures was carried out by analyzing scientific and technical literature, articles, regulatory and technical documents and information from open sources on the problem under study.Results. The experience of using steel reinforcement with protective coatings in Russia and abroad is given. The most widely used technologies for applying protective coatings to reinforcement in factory conditions are highlighted. The main advantages and disadvantages of reinforcement with a protective coating are shown on the example of studies, both in terms of the durability of the coating itself and in terms of working together with concrete. The state of the domestic and foreign regulatory base differs significantly from each other. In contrast to Russia, an extensive regulatory base has been created abroad that allows the design of reinforced concrete structures with reinforcement with protective coatings. Using the example of foreign experience, the most economically feasible types of protective coatings have been identified. With a certain increase in the cost of reinforcement with protective coatings compared to black reinforcement, economic efficiency is generally achieved by increasing the service life of the reinforced concrete structure.Conclusions. Modern design and construction practice shows that for a number of reinforced concrete structures operating under the influence of aggressive environment, it is necessary to use reinforcement with protective coatings. There are great prospects for the use of reinforcement with protective coatings in Russia, but it is necessary to develop а regulatory and technical base in this direction. Based on the results of the analysis of the issue, proposals are given on the need to carry out research and a list of necessary regulatory and technical documents for the introduction of reinforcement with a protective coating into the practice of construction.