Corrosion Monitoring in Concrete Structure using Fiber Optic Sensor
Corrosion in concrete structures is a major problem which seriously affects the service life of the structures. In order to detect rebar corrosion, a fiber optic corrosion sensor (FOCS) being made of one Fiber Bragg Grating (FBG) sensor and twin steel rebar elements was designed, and subsequently a series of experiments were carried out to verify its feasibility. Initial test was performed on one exposed fiber optic corrosion sensor in a simulated Corrosive atmosphere, and the average corrosion rate 32.4pm/day in original 40 days was obtained. Furthermore, a constant current accelerated corrosion test was carried out for six fiber optic corrosion sensors embedded in six concrete specimens respectively. In original 90 days, an average corrosion rate was estimated to be 17.6pm/day for FOCS B. The experimental results show that the fiber optic corrosion sensor can measure rebar corrosion level and has a wide spectrum of applications.
Fiber optic corrosion sensor Corrosion monitoring FBG Constant current Accelerated corrosion test Rebar
Junqi Gaoa Jin Wub Xinming Zhao Jun Li Li Yang Jiang Geng Wencao Wu
Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
国际会议
南京
英文
497-501
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）