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Proceedings Paper

Monitoring uniform and localized corrosion in reinforced mortar using high-frequency guided longitudinal wages
Author(s): Benjamin L. Ervin; Henrique Reis; Jennifer T. Bernhard; Daniel A. Kuchma
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Paper Abstract

High-frequency guided longitudinal waves have been used in a through-transmission arrangement to monitor reinforced mortar specimens undergoing both accelerated uniform and localized corrosion. High-frequency guided longitudinal waves were chosen because they have the fastest propagation velocity and lowest theoretical attenuation for the rebar/mortar system. This makes the modes easily discernible and gives them the ability to travel over long distances. The energy of the high-frequency longitudinal waves is located primarily in the center of the rebar, leading to less leakage into the surrounding mortar. The results indicate that the guided mechanical waves are sensitive to both forms of corrosion attack in the form of attenuation, with less sensitivity at higher frequencies. Also promising is the ability to discern uniform corrosion from localized corrosion in a through-transmission arrangement by examination of the frequency domain.

Paper Details

Date Published: 8 April 2008
PDF: 12 pages
Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 69321F (8 April 2008); doi: 10.1117/12.768011
Show Author Affiliations
Benjamin L. Ervin, Univ. of Illinois at Urbana-Champaign (United States)
Henrique Reis, Univ. of Illinois at Urbana-Champaign (United States)
Jennifer T. Bernhard, Univ. of Illinois at Urbana-Champaign (United States)
Daniel A. Kuchma, Univ. of Illinois at Urbana-Champaign (United States)


Published in SPIE Proceedings Vol. 6932:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008
Masayoshi Tomizuka, Editor(s)

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