Rebar corrosion monitoring in concrete structure under salt water enviroment using fiber Bragg grating

Yuheng Pan; Tiegen Liu; Junfeng Jiang; Kun Liu; Shuang Wang; Pan He; Jinlin Yan

doi:10.1117/12.2193226

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10 August 2015 Rebar corrosion monitoring in concrete structure under salt water enviroment using fiber Bragg grating

Yuheng Pan, Tiegen Liu, Junfeng Jiang, Kun Liu, Shuang Wang, Pan He, Jinlin Yan

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Proceedings Volume 9620, 2015 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 962012 (2015) https://doi.org/10.1117/12.2193226
Event: International Conference on Optical Instruments and Technology 2015, 2015, Beijing, China

Abstract

Monitoring corrosion of steel reinforcing bars is critical for the durability and safety of reinforced concrete structures. Corrosion sensors based on fiber optic have proved to exhibit meaningful benefits compared with the conventional electric ones. In recent years, Fiber Bragg Grating (FBG) has been used as a new kind of sensing element in an attempt to directly monitor the corrosion in concrete structure due to its remarkable advantages. In this paper, we present a novel kind of FBG based rebar corrosion monitoring sensor. The rebar corrosion is detected by volume expansion of the corroded rebar by transferring it to the axial strain of FBG when concrete structure is soaked in salt water. An accelerated salt water corrosion test was performed. The experiment results showed the corrosion can be monitored effectively and the corrosion rate is obtained by volume loss rate of rebar.

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Yuheng Pan, Tiegen Liu, Junfeng Jiang, Kun Liu, Shuang Wang, Pan He, and Jinlin Yan "Rebar corrosion monitoring in concrete structure under salt water enviroment using fiber Bragg grating", Proc. SPIE 9620, 2015 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 962012 (10 August 2015); https://doi.org/10.1117/12.2193226

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