Detection of multiple corrosion thresholds in reinforced concrete structures using passive sensors

Ali E. Abu-Yosef; Praveen Pasupathy; Sharon L. Wood; Dean P. Neikirk

doi:10.1117/12.915164

4 April 2012 Detection of multiple corrosion thresholds in reinforced concrete structures using passive sensors

Ali E. Abu-Yosef, Praveen Pasupathy, Sharon L. Wood, Dean P. Neikirk

Proceedings Volume 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012; 83470J (2012) https://doi.org/10.1117/12.915164
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

This paper describes the ongoing research efforts to develop a novel class of low-cost, unpowered, wireless sensors for detecting corrosion of reinforcement in concrete structures. The sensors are powered through magnetic coupling between an external reader coil and an embedded sensor. Measured AC impedance is used to interpret the state of the embedded sensor. The sensors are envisioned to be placed during construction and interrogated as part of routine inspections. The sensor prototype incorporates a sacrificial corroding element that is placed entirely outside the sensor components and interacts with the resonant circuit by inductive coupling and shielding of the magnetic fields. As the resistance of the sacrificial element increases due to corrosion, the measured frequency response changes gradually indicating corrosion initiation within concrete. In this paper the potential for detecting multiple levels of corrosion damage is demonstrated.

Citation Download Citation

Ali E. Abu-Yosef, Praveen Pasupathy, Sharon L. Wood, and Dean P. Neikirk "Detection of multiple corrosion thresholds in reinforced concrete structures using passive sensors", Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012, 83470J (4 April 2012); https://doi.org/10.1117/12.915164

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