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Proceedings Paper

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

Acoustic Emission (AE) sensing was employed to assess the rate of corrosion of steel strands in small scale concrete block specimens. The corrosion process was accelerated in a laboratory environment using a potentiostat to supply a constant potential difference with a 3% NaCl solution as the electrolyte. The embedded prestressing steel strand served as the anode, and a copper plate served as the cathode. Corrosion rate, half-cell potential measurements, and AE activity were recorded continuously throughout each test and examined to assess the development of corrosion and its rate. At the end of each test the steel strands were cleaned and re-weighed to determine the mass loss and evaluate it vis-á-vis the AE data. The initiation and propagation phases of corrosion were correlated with the percentage mass loss of steel and the acquired AE signals. Results indicate that AE monitoring may be a useful aid in the detection and differentiation of the steel deterioration phases, and estimation of the locations of corroded areas.

Paper Details

Date Published: 14 April 2011
PDF: 12 pages
Proc. SPIE 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, 79811K (14 April 2011); doi: 10.1117/12.880169
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. 7981:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
Masayoshi Tomizuka, Editor(s)

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