The purpose of this paper is to find an limitation to detect the defect of damaged asphalt pavement structures for improved infrared thermography. We use heat source of a natural light to detect the defect efficiently. The heat source was applied to the asphalt specimens containing maximum depth of 3cm internal timber. It was found that the depth of 3cm internal timber could be detected by this method. In addition, we used the improved image processing to make the damage zone displayed clear in the image obtained from the thermographic operation.

• 심준기(한국건설기술연구원 구조융합연구소 박사후연구원, 공학박사) | Sim, Jun Gi 교신저자
• 박기태(한국건설기술연구원 구조융합연구소 연구위원, 공학박사) | Park, Ki Tae
• 신현섭(한국건설기술연구원 구조융합연구소 수석연구원, 공학박사) | Sin, Hyun Seop
• 김태헌(한국건설기술연구원 구조융합연구소 석사후연구원, 공학석사) | Kim, Tae Heon
• 김지영(한국건설기술연구원 구조융합연구소 석사후연구원, 공학석사) | Kim, Ji Young