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SOME FACTORS AFFECTING THE PERFORMANCE OF REINFORCED CONCRETE ENGINEERING STRUCTURES OPERATING IN A CORROSIVE ENVIRONMENT

Abstract

The paper presents a study of the performance of reinforced concrete engineering structures that operate in corrosive media and have some damages in concrete and main reinforcement. The major structural part of an engineering facility is formed by reinforced concrete structures with long service life. Insufficient financial support of maintenance activities has resulted in multiple defects that developed in concrete during operation time with wear rate over 30%. The operation of reinforced concrete structures in engineering facilities in corrosive media results in an increase in repair works. Synergetic impact of different media causes notable changes in stress-related properties and mechanical characteristics of concrete in the affected area of reinforced concrete structures of an engineering facility. The main objectives of the presented research was to identify the types of corrosive media, and to determine their influence upon the structure and strength characteristics of concrete and reinforcement, to investigate the mechanisms of a corrosive medium penetration into cast stone. Time-related changes in the properties of a material have irreversible nature and depend on straining conditions and environment interaction pattern. Moreover, as a corrosive medium is penetrating into the body of a structure the protective ability of concrete deteriorates and reinforcement begins to corrode. An examination of reinforcement corrosion in a reinforced concrete engineering structure and diagnosis of corrosion damage can often be complicated because the reinforcement is insulated by concrete. Protective performance of concrete depends on its density, protective layer thickness and chemical composition of the matrix. Corrosion decreases cross-section area of reinforcement and affects its cohesion with concrete., which has a negative effect on the performance of a reinforced concrete structure of an engineering facility.

About the Authors

E. G. Pakhomova
Southwest State University
Russian Federation


V. G. Semerinov
Southwest State University
Russian Federation


E. I. Guteneva
Southwest State University
Russian Federation


References

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Review

For citations:


Pakhomova E.G., Semerinov V.G., Guteneva E.I. SOME FACTORS AFFECTING THE PERFORMANCE OF REINFORCED CONCRETE ENGINEERING STRUCTURES OPERATING IN A CORROSIVE ENVIRONMENT. Proceedings of the Southwest State University. 2016;(6):81-88. (In Russ.)

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ISSN 2223-1560 (Print)
ISSN 2686-6757 (Online)