Reliability of Thermal Images and Numerical Modelling on Passive Infrared Thermography for Concrete Structures
- Concrete deterioration,
- non destructive testing,
- Infrared Thermography,
- Numerical modelling,
- Defect quantification
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Copyright (c) 2023 Journal of Non-Destructive Testing and Evaluation (JNDE)
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Premature deterioration of reinforced concrete (RC) structures resulting from exposure to aggressive environments is a serious challenge faced by civil engineers. Highway bridges, marine structures, and industrial power plants are typical examples of structures facing premature deterioration. Evaluation of concrete quality and deterioration in concrete structural elements using non-destructive testing methods such as Infrared Thermography (IRT) plays a vital role. Defects such as honeycombs, delamination etc can be identified based on the temperature variation on the thermograms. But, the depth of delamination cannot be determined. In this paper, experimental studies were carried with different depths of delamination & numerical studies based on heat transfer were performed. The depth of delamination obtained from the numerical model was found to be matching with the experimental studies and the numerical model was validated.
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