Determination of the applicability and limits of void and delamination detection in concrete structures using infrared thermography

摘要

Based on the results of the infrared thermography of 51 artificially created defects - voids and delaminations - in concrete, it was shown that it is possible to detect defects at depths that are equal or less than the defect size D using the thermal contrast method. By applying the phase contrast method, an increase of 50% in the maximum depth for a given defect size D was achieved. Delaminations containing thin air gaps were detected with the same success as much larger voids of the same cross section. (C) 2015 Elsevier Ltd. All rights reserved.