Impact of corrosion of steel reinforcement bars in concrete lining on GPR signals

Corrosion data of different-type steel components of reinforced concrete lining for mine openings are studied for the corrosion stability classification. Different degrees of corrosion of steel reinforcement bars are modeled, and samples of reinforced concrete lining are made on this basis. Using the nondestructive GPR method, a series of model experiments is carried out, which allows taking into account the influence exerted by corrosion of a material on GPR signals (there other parameters of the model being unchanged). An algorithm is proposed to estimate quantitatively the amplitudes of spectral components of GPR signals, and the effect of corrosion of steel bars on the amplitudes is investigated. It is shown that the decreased amplitudes of spectral components of GPR signals because of corrosion of the bar-mat reinforcement can enable detection of corroded bars in concrete lining using GPR in actual practice. The most pronounced decrease (by 13–90%) in the amplitudes of GPR signals is obtained on the frequencies 1.5–2 times higher than the spectrum center frequency. The implemented research can help shape a scientific framework for the analysis of the effect exerted by corrosion of steel reinforcement on GPR signals, and can promote safety of operation of reinforced concrete lining in mine openings owing to the use of GPR in the lining inspection. 

Khmelinin A. P., Denisova E. V., Konurin A. I., Sokolov K. O., Voitenko A. A. Impact of corrosion of steel reinforcement bars in concrete lining on GPR signals. MIAB. Mining Inf. Anal. Bull. 2026;(2):62-80. [In Russ]. DOI: 10.25018/0236_1493_2026_2_0_62.

The work was carried out within the framework of the FNI projects (state registration number 126021217128-9, code FWNZ-2026-0009).

A.P. Khmelinin¹, Cand. Sci. (Eng.), Director, e-mail: hmelinin@misd.ru, ORCID ID: 0009-0001-8790-8374,
E.V. Denisova¹, Cand. Sci. (Eng.), Assistant Professor, Senior Researcher, e-mail: slimthing@mail.ru, ORCID ID: 0009-0008-4349-3470,
A.I. Konurin¹, Cand. Sci. (Eng.), Senior Researcher, e-mail: akonurin@yandex.ru, ORCID ID: 0000-0003-3373-2382,
K.O. Sokolov, Cand. Sci. (Eng.), Senior Researcher, Institute of Mining of the North of Siberian Branch of Russian Academy of Sciences, 677980, Yakutsk, Russia, e-mail: k.sokolov@ro.ru, ORCID ID: 0000-0002-4179-9619,
A.A. Voitenko¹, Graduate Student, e-mail: voitenkoalex00@gmail.com, ORCID ID: 0009-0006-3964-0234,
¹ N.A. Chinakal Institute of Mining of Siberian Branch of Russian Academy of Sciences, 630091, Novosibirsk, Russia.

E.V. Denisova, e-mail: slimthing@mail.ru.

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