In this study, an experimental test is conducted on a concrete specimen using passive thermography (IRT) which is an effective and modern non-destructive test (NDT) method in detecting delaminations. The present work evaluates the detectability of delaminations with different sizes during the daytime by the absolute contrast technique. In addition, the most suitable time for delamination inspection of concrete structures is also proposed.

Abstract
 1. Introduction
 2. Experimental test
 3. Detectability of delaminations with different sizes
 4. Conclusion
 References

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