Publications / 2000 Proceedings of the 17th ISARC, Taipei, Taiwan

The Behavior of Ultrasonic Waves Propagating in Concrete Using the Ultrasonic-Pulse Methods to Measure the Depths of Cracks in Concrete

Chi-Hsing Wu, Jiung-Yuan Wang
Pages 1-6 (2000 Proceedings of the 17th ISARC, Taipei, Taiwan, ISBN 9789570266986, ISSN 2413-5844)
Abstract:

With a system of two sensitive accelerometers connected to a high-resolution of oscilloscope, the paper proposed an arrangement of accelerometers to monitor the pulse waves generated by an ultrasonic transducer when performing a surface measurement on concrete. The velocities of the logitudinal wave (the P-wave) and the Rayleigh wave (the Rwave) were estimated by reading the responses of the wave in time domain. The results were in a good agreement with the estimated P-wave velocity by a direct measurement using the ultrasonic apparatus. A similar arrangement was performed on concrete cracks to predicted the depths. The results were very close to the actual depths with errors well within ±1 cm.

Keywords: Ultrasonic, Nondestructive, Cracks, Elastic Wave, Rayleigh Wave