Ultrasonic Techniques for the Bonding of Rebar in Concrete Structures

摘要

A through ultrasonic technique was used to evaluate the bonding and a semi-through ultrasonic technique was used to find the location of unbonded metal reinforcement rods in a concrete specimen by measuring and comparing the maximum amplitude response of received signals. In addition, a practical system for implementing the semi-through ultrasonic technique using a rotary sender transducer was developed and tested to reduce measurement times.