Bridge concrete deteriorating diagnosis by infrared thermography

Hiroki Shibata; Nobuhiro Fukuyama; Joji Sakuma; Jun Mochizuki; Yukinori Kimura

doi:10.1117/12.665441

18 April 2006 Bridge concrete deteriorating diagnosis by infrared thermography

Hiroki Shibata, Nobuhiro Fukuyama, Joji Sakuma, Jun Mochizuki, Yukinori Kimura

Proceedings Volume 6205, Thermosense XXVIII; 62051K (2006) https://doi.org/10.1117/12.665441
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

Bridge is indispensable as social overhead capital. In the past, concrete construction was believed to be semi-permanent. Actually, however, concrete is deteriorated by various factors including seawater damage, annual temperature change, etc. Therefore, it is now obvious that maintenance and management are essential to keep performance of the bridge. In Japan, we had many reports of using infrared thermography for diagnosis of building, mainly for delamination of tile and mortar used for surface of the building for more than 10 years. In recent years, infrared thermogrephy is more actively used for delamination of surface of the bridge. Passive method is usually used for open-air concrete structure diagnosis, which utilizes intraday environmental temperature change and/or radiation energy emitted from the sun which create delta-T of delamination portion of the concrete structure. It is very important to take thermal image at right conditions. Otherwise, you may easily fall onto false diagnosis. In our presentation, many case examples and study of thermal data will be shown, which are taken at the right condition.

Citation Download Citation

Hiroki Shibata, Nobuhiro Fukuyama, Joji Sakuma, Jun Mochizuki, and Yukinori Kimura "Bridge concrete deteriorating diagnosis by infrared thermography", Proc. SPIE 6205, Thermosense XXVIII, 62051K (18 April 2006); https://doi.org/10.1117/12.665441

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