Abstract
This article introduces the commonly used detection methods for internal defects in concrete; A review was conducted on the research progress of impact echo method and infrared thermal imaging method. The principles of impact echo method and infrared thermal imaging method were studied, and the problems existing in existing methods were pointed out. The results indicate that the detection methods for internal defects in concrete have made certain progress in both theoretical research and engineering applications. However, further improvement and refinement are still needed. The most important step in the improvement plan is to determine the damage situation of reinforced concrete components. From multiple perspectives, non-destructive testing is undoubtedly the main development object for detecting concrete damage in the future.
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