A Study on the Wave Modes in Measurements of the Crack Depth of Concrete by Ultrasonic Waves

초음파에 의한 콘크리트의 균열깊이 측정에 있어서 음파모드에 관한 연구

As the necessity of the safety diagnosis of the concrete structure, more reliable ultrasonic technique to qualify the concrete is required. In this study, the artificial surface crack depth is measured using several types of the ultrasonic probes. As results, the horizontal shear wave probe is most useful to determine the crack depth compared to the other probes. For the surface wave probe, the ultrasonic wave path is changed with the surface crack depth.