About the Mechanism of Destruction of the Protective Layer of Concrete Due to Reinforcement Corrosion

The purpose of the presented study was to draw attention to a serious defect in reinforced concrete structures operating under aggressive environment conditions – to the destruction of the protective layer of concrete due to corrosion of reinforcing rods. The protective layer of concrete with a thickness of 10-30 mm is designed to ensure the safety of steel reinforcement from aggressive environmental factors, however, over time, under the impact of various aggressive factors, its ability to protect the reinforcement from corrosion is noticeably reduced. Steel reinforcement, being covered with a layer of corrosion, exerts significant pressure on the protective layer of concrete, as a result, cracks of various orientations form between the reinforcement and concrete, this contributes to the rapid penetration of aggressive factors to the reinforcement, to an increase in the intensity of corrosion and further to the separation of the protective layer of concrete. Corrosion of the reinforcement in the open air occurs even more intensively, which leads to a rapid decrease in the area of the working section of the reinforcement and premature collapse of structures from the operating load. To eliminate this drawback, it is proposed to install fiberglass nets in the protective layer of concrete that can increase the crack resistance of concrete under aggressive external impacts and prevent the separation of the protective layer of concrete from the reinforced concrete structure (RF patent No. 2744905 of December 26, 2018). This measure will make it possible to create reinforced concrete structures of increased reliability and durability.

A.V. KURSHPEL, Candidate of Sciences (Engineering), (This email address is being protected from spambots. You need JavaScript enabled to view it.),
V. Kh. KURSHPEL, Candidate of Sciences (Engineering), (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Ural Federal University named after the first President of Russia B.N. Yeltsin, Institute of Civil Engineering and Architecture (17, Mira Street, Ekaterinburg, 620002, Russian Federation)

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