APPLICATION OF THE REBOUND METHOD AND THE ULTRASONIC-REBOUND METHOD IN THE HIGH-STRENGTH CONCRETE NON-DESTRUCTIVE TEST―RESEARCH AND FORMULATE THE STRENGTH TEST CURVE IN KUNMING

摘要

The codes of the rebound method and the ultrasonic-rebound method have been applied to test concrete strength extensively in engineering. But now there is no general admitted non-destructive test technology of the rebound method and the ultrasonic rebound method in the high-strength concrete in excess of 50MPa except the little damaged core-drilling method. In this paper, based on the experimental study of the high-strength concrete by using the large energy rebound instrument and the common ultrasonic in Kunming, we found the strength test curve is in agreement with national standard, set up our enterprise standard and can test the high-strength concrete with streyth from 50MPa to 80MPa.