INFRARED FLASH THERMOGRAPHY (FT) FOR BUILDING DIAGNOSIS

This is my MPhil thesis on the topic of using infrared flash thermography (FT) for detecting surface crackssubsurface defects and water-paths in building structures.Infrared thermography was started to apply on building diagnosis in the early 19th century.In the beginningvideo-recording is used for storing the infrared images and for visual analysis. Towards the 22 centurywith the rapid improvements on technologyinfrared signals are digitized and stored in computer for future analysis. Besidesthe acheivements on developing infrared camera with higher sensivity and higher capturing frequencysmall deviation on the temperature field of an object can be recorded and analyzed. Thereforein this studyinfrared flash thermography (FT) has been used to detect the three major building defects in concrete structures:surface crackssubsurface defects and water-paths.The high capturing frequencies enabled and enhanced the detection of surface cracks.Moreoverthe increase in sensitivity and digitization of infrared signals enbale post-processing.In this studyfirst and second deviations are applied which enhanced the detection of small temperature change on defected area.