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Advances in Materials Science and Engineering
Volume 2017, Article ID 3829340, 8 pages
https://doi.org/10.1155/2017/3829340
Research Article

Concrete Pavement Service Condition Assessment Using Infrared Thermography

Boise State University, 1910 University Drive, Boise, ID 83725-2060, USA

Correspondence should be addressed to Yang Lu; ude.etatsesiob@knarfulgnay

Received 15 April 2017; Accepted 21 June 2017; Published 26 July 2017

Academic Editor: Hainian Wang

Copyright © 2017 Yang Lu 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

Infrared thermography (IRT), an effective nondestructive testing method, is used to obtain an initial evaluation of the concrete pavement surface and near surface in a time effective manner. In this paper, the effect of the depth of delamination inside concrete pavement on infrared thermography technique is studied for bridge decks inspection. To be able to mimic the delamination in subsurface, two Styrofoam cubes have been inserted in different depth near the surface of the concrete cylinder. After heating up the specimen, thermal images were taken from the surface using an infrared thermal camera to evaluate the effect of subsurface defects on detection sensitivity and accuracy. We also investigated the precision to which the shape and the size of the subsurface anomalies can be perceived using an uncooled thermal camera. To achieve this goal, we used image processing technique to accurately compute the size of delamination in order to compare it with the actual size. In addition, distance/thermal graph is used to detect the presence of the defect underneath the concrete surface. Furthermore, thermal transfer modeling was adopted in this paper to assist the setup of this experiment and the results are compared with laboratory findings.