CORROSION DETECTION OF BRIDGE REINFORCED CONCRETE WITH INDUCTION HEATING AND INFRARED THERMOGRAPHY

Lu Liu, Dan Zheng, Jianting Zhou, Jun He, Jingzhou Xin, and Yupeng Cao

Keywords

Corrosion detection, induction heating, infrared thermography,bridge

Abstract

In this paper, a novel method for non-destructive detection of steel corrosion in bridge reinforced concrete is proposed with induction heating and infrared thermography. Steel rebar and reinforced concrete specimens were fabricated with different corrosion levels through an accelerated corrosion process. Corroded and noncorroded steel rebar and reinforced concrete specimen were heated by an indirect contacted inductive heater, and an infrared camera was applied to measure temperature distribution and change at the concrete surface. The experimental results show that the temperature rise in the corroded rebar is higher than that in the non-corroded rebar, and the difference is greater when the corrosion degree is greater. This study provided a new possible way for non-destructive detection of corrosion in reinforced concrete bridges.

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