PSI - Issue 64

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ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 64 (2024) 48–55

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Development for Corrosion Protection Method of Reinforcement in RC Structures by Electromagnetic Induction Hideki Oshita* Chuo University, 1-13-27, kasuga, Bunkyo-ku, Tokyo 112-8551, Japan Abstract This study focuses on the development of a method for preventing corrosion in RC structures by inducing current non-destructively and non-contactly into the internal reinforcing bars using the principles of electromagnetic induction. In this paper, firstly we conduct fundamental investigations into the characteristics of induced current on the reinforcing bar surface using experimental and analytical methods. Based on the results, we establish corrosion prevention conditions for this method (induced current density and power consumption). Next, we examine the corrosion prevention effect quantitatively for both macrocell and microcell corrosion in test specimens with multiple reinforcing bars. The findings demonstrate the effectiveness of this method against microcell corrosion © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Development for Corrosion Protection Method of Reinforcement in RC Structures by Electromagnetic Induction Hideki Oshita* Chuo University, 1-13-27, kasuga, Bunkyo-ku, Tokyo 112-8551, Japan Abstract This study focuses on the development of a method for preventing corrosion in RC structures by inducing current non-destructively and non-contactly into the internal reinforcing bars using the principles of electromagnetic induction. In this paper, firstly we conduct fundamental investigations into the characteristics of induced current on the reinforcing bar surface using experimental and analytical methods. Based on the results, we establish corrosion prevention conditions for this method (induced current density and power consumption). Next, we examine the corrosion prevention effect quantitatively for both macrocell and microcell corrosion in test specimens with multiple reinforcing bars. The findings demonstrate the effectiveness of this method against microcell corrosion © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: corrosion protection, electromagnetic induction, coil 1. Introduction Among the various deterioration phenomena in RC structures, corrosion of reinforcing bar is particularly significant. When rebar corrosion occurs, the cross-sectional loss leads to excessive stress in the rebar compared to the design specifications, resulting in a decrease in structural performance. Additionally, rebar corrosion expansion causes concrete cracking, deterioration of rebar-concrete bond, and spalling of cover concrete, significantly compromising © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Peer-review under responsibility of SMAR 2024 Organizers Keywords: corrosion protection, electromagnetic induction, coil 1. Introduction Among the various deterioration phenomena in RC structures, corrosion of reinforcing bar is particularly significant. When rebar corrosion occurs, the cross-sectional loss leads to excessive stress in the rebar compared to the design specifications, resulting in a decrease in structural performance. Additionally, rebar corrosion expansion causes concrete cracking, deterioration of rebar-concrete bond, and spalling of cover concrete, significantly compromising

* Corresponding author. Tel.: +81-3-3817-1801; fax: +81-3-3817-1801. E-mail address: oshita@civil.chuo-u.ac.jp * Corresponding author. Tel.: +81-3-3817-1801; fax: +81-3-3817-1801. E-mail address: oshita@civil.chuo-u.ac.jp

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

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