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Proceedings Paper

Detection of multiple corrosion thresholds in reinforced concrete structures using passive sensors
Author(s): Ali E. Abu-Yosef; Praveen Pasupathy; Sharon L. Wood; Dean P. Neikirk
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Paper 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.

Paper Details

Date Published: 4 April 2012
PDF: 7 pages
Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012, 83470J (4 April 2012); doi: 10.1117/12.915164
Show Author Affiliations
Ali E. Abu-Yosef, The Univ. of Texas at Austin (United States)
Praveen Pasupathy, The Univ. of Texas at Austin (United States)
Sharon L. Wood, The Univ. of Texas at Austin (United States)
Dean P. Neikirk, The Univ. of Texas at Austin (United States)


Published in SPIE Proceedings Vol. 8347:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012
Andrew L. Gyekenyesi, Editor(s)

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