Study on the Methods of Ultrasonic Testing for the Cracks in Concrete

摘要

The cracks existing in the concrete components have a strong impact on the safety of their structures. Ultrasonic testing is an effective non-destructive testing method for fast excluding surface and internal defects of concrete in construction engineering. The concrete specimens were tested by the calculation methods of ultrasonic single plane testing (CMSPT) and first wave reversed phase testing (FWRPT), and the test data were processed and analyzed. The results show that the depth of the tested cracks is close to that of the set defects. The average detection error of CMSPT is 4.35%, while the average detection error of FWRPT is 1.94%. Therefore, FWRPT has a better stability, higher testing accuracy and easier actual operation, but the lower roughness of the concrete surface is needed in the testing process.