Optical-based sensors for monitoring corrosion of reinforcement rebar via an etched cladding Bragg grating

• Main Authors: Adikan, Faisal Rafiq Mahamd, Abu Hassan, M.R., Abu Bakar, M.H., Dambul, K.D.
• Format: Article
• Language: English
• Published: MDPI 2012
• Subjects: TA Engineering (General). Civil engineering (General)
• Online Access: http://eprints.um.edu.my/10061/1/Optical-Based_Sensors_for_Monitoring_Corrosion_of.pdf; http://eprints.um.edu.my/10061/; http://www.mdpi.com/1424-8220/12/11/15820
• Institution: Universiti Malaya

In this paper, we present the development and testing of an optical-based sensor for monitoring the corrosion of reinforcement rebar. The testing was carried out using an 80% etched-cladding Fibre Bragg grating sensor to monitor the production of corrosion waste in a localized region of the rebar. Progression of corrosion can be sensed by observing the reflected wavelength shift of the FBG sensor. With the presence of corrosion,the etched-FBG reflected spectrum was shifted by 1.0 nm. In addition, with an increase in fringe pattern and continuously, step-like drop in power of the Bragg reflected spectrum was also displayed.