ABSTRACT
In this paper, the effectiveness of CNNs trained on the spectrograms of impact echo is examined for micro cracks in concrete caused by corrosion expansion of reinforcing bars. As results of the study, this method is confirmed to be able to detect internal cracks caused by corrosion of reinforcing bars with cover concrete. In addition, the possibility of recognizing the slight change in impact echo by the development of internal cracks and evaluating the progress of deterioration is found.
