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Advances in Materials Science and Engineering
Volume 2016, Article ID 1053856, 12 pages
http://dx.doi.org/10.1155/2016/1053856
Research Article

Experimental Study on Detection of Deterioration in Concrete Using Infrared Thermography Technique

1Department of Ocean Civil Engineering, Chonnam National University, Yeosu 59626, Republic of Korea
2Department of Civil Engineering, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea
3Department of Civil Engineering, Gyeongnam National University of Science and Technology, Jinju, Gyeongnam 52725, Republic of Korea
4Department of Civil & Construction Engineering, Oregon State University, Corvallis, OR 97331, USA

Received 4 March 2016; Accepted 30 March 2016

Academic Editor: Velu Saraswathy

Copyright © 2016 Jungwon Huh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Concrete is certainly prone to internal deteriorations or defects during the construction and operating periods. Compared with other nondestructive techniques, infrared thermography can easily detect the subsurface delamination in a very short period of time, but accurately identifying its size and depth in concrete is a very challenging task. In this study, experimental testing was carried out on a concrete specimen having internal delaminations of various sizes and at varying depths. Delaminations at 1 and 2 cm deep showed a good temperature contrast after only 5-minute heating, but delaminations at 3 cm practically identified the value of the temperature contrast from heating of 15 minutes. In addition, the size of the delamination at 3 cm deep could be estimated with a difference of 10% to 28% for 20 minutes of heating. The depth of the delamination was linearly correlated with the increase in its size.