The impact elastic wave and ultrasonic wave were used to test the grouting fullness of the connection node of prefabricated shear wall structure, and the test results of the vertical plum blossom shape and double row symmetric sleeve joints under different working conditions were compared and analyzed. The results show that the ultrasonic wave can judge the grouting fullness of the joint of the sleeve by the change of the sound velocity value, and the impact elastic wave can determine the grouting quality of the joint of the sleeve through the excellent frequency in the spectrogram, the thickness of the reflection in the survey area and the reflection time. For the double-row symmetrical sleeve connection node, it is difficult for ultrasonic waves to determine which sleeve has a void defect on the front and back sides, but the impact elastic wave can discriminate the specific grouting fullness of each sleeve on both sides of the front and back by the change of the excellent frequency.
China Concrete and Cement Products
Prefabricated concrete structure
Impact elastic wave