Share Email Print
cover

Proceedings Paper

Nondestructive corrosion detection in concrete through integrated heat induction and IR thermography
Author(s): Seung-Jun Kwon; Henry Xue; Maria Q. Feng; Seunghoon Baek
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Steel corrosion in concrete is a main cause of deterioration and early failure of concrete structures. A novel integration of electromagnetic heat induction and infrared (IR) thermography is proposed for nondestructive detection of steel corrosion in concrete, by taking advantage of the difference in thermal characteristics of corroded and non-corroded steel. This paper focuses on experimental investigation of the concept. An inductive heater is developed to remotely heat the steel rebar from concrete surface, which is integrated with an IR camera. Bare rebar and concrete samples with different cover depths are prepared. Each concrete sample is embedded with a single steel rebar in the middle, resulting an identical cover depth from the front and the back surfaces, which enables heat induction from one surface and IR thermogrphay from the other simultaneously. The impressed current method is adopted to induce accelerated corrosion on the rebar. IR video images are recorded during both heating and cooling periods. The test results demonstrate a clear difference in thermal characteristics between corroded and non-corroded samples. The corroded samples show higher rates of heating and cooling as well as a higher peak IR intensity than those of the non-corroded samples. This study demonstrates a potential for nondestructive detection of rebar corrosion in concrete.

Paper Details

Date Published: 19 April 2011
PDF: 11 pages
Proc. SPIE 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011, 79831R (19 April 2011); doi: 10.1117/12.881121
Show Author Affiliations
Seung-Jun Kwon, Korea Conformity Labs. (Korea, Republic of)
Henry Xue, California State Polytechnic Univ. (United States)
Maria Q. Feng, Univ. of California, Irvine (United States)
Seunghoon Baek, Univ. of California, Irvine (United States)


Published in SPIE Proceedings Vol. 7983:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011
H. Felix Wu, Editor(s)

© SPIE. Terms of Use
Back to Top