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Proceedings Paper

Characterization of corrosion damage in prestressed concrete using acoustic emission
Author(s): Jesé Mangual; Mohamed K. ElBatanouny; William Vélez; Paul Ziehl; Fabio Matta; Miguel González
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Paper Abstract

The corrosion of reinforced concrete structures is a major issue from both a structural safety and maintenance management point of view. Early detection of the internal degradation process provides the owner with sufficient options to develop a plan of action. An accelerated corrosion test was conducted in a small scale concrete specimen reinforced with a 0.5 inch (13 mm) diameter prestressing strand to investigate the correlation between corrosion rate and acoustic emission (AE). Corrosion was accelerated in the laboratory by supplying anodic current via a rectifier while continuously monitoring acoustic emission activity. Results were correlated with traditional electrochemical techniques such as half-cell potential and linear polarization. The location of the active corrosion activity was found through a location algorithm based on time of flight of the stress waves. Intensity analysis was used to plot the relative significance of the damage states present in the specimen and a preliminary grading chart is presented. Results indicate that AE may be a useful non-intrusive technique for the detection and quantification of corrosion damage.

Paper Details

Date Published: 6 April 2012
PDF: 10 pages
Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 834543 (6 April 2012); doi: 10.1117/12.915390
Show Author Affiliations
Jesé Mangual, Univ. of South Carolina (United States)
Mohamed K. ElBatanouny, Univ. of South Carolina (United States)
William Vélez, Univ. of South Carolina (United States)
Paul Ziehl, Univ. of South Carolina (United States)
Fabio Matta, Univ. of South Carolina (United States)
Miguel González, MISTRAS Group, Inc. (United States)

Published in SPIE Proceedings Vol. 8345:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012
Masayoshi Tomizuka; Chung-Bang Yun; Jerome P. Lynch, Editor(s)

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