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Proceedings Paper

Magnetostrictive sensors for the characterization of corrosion in rebars and prestressing strands
Author(s): Keith A. Bartels; Hegeon Kwun; John J. Hanley
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Paper Abstract

The feasibility of characterizing the severity of corrosion in reinforcing bars and prestressing strands was investigated using the magnetostrictive sensor (MsS) technique and time-frequency analysis. Relatively high bandwidth elastic waves were generated and detected in these steel members using the MsS technique. The detected signals wee then analyzed for their dispersion characteristics and attenuation with time-frequency analysis. In both rebars and strands, the wave attenuation was found to increase with an increased degree of corrosion. Wave attenuation was found to increase significantly when strands and rebar were cast in concrete. Initial studies showed that low frequencies will be needed to operate over a significant distance in concrete.

Paper Details

Date Published: 13 November 1996
PDF: 11 pages
Proc. SPIE 2946, Nondestructive Evaluation of Bridges and Highways, (13 November 1996); doi: 10.1117/12.259151
Show Author Affiliations
Keith A. Bartels, Southwest Research Institute (United States)
Hegeon Kwun, Southwest Research Institute (United States)
John J. Hanley, Southwest Research Institute (United States)

Published in SPIE Proceedings Vol. 2946:
Nondestructive Evaluation of Bridges and Highways
Steven B. Chase, Editor(s)

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