Initial Laboratory Studies of the Nondestructive Evaluation of ConcreteConsolidation Using a Pulsed Ultrasonic Interferometer

摘要

The objectives of the study were (1) to study the feasibility of using a pulsed,swept-frequency ultrasonic interferometer in the nondestructive evaluation of the degree of concrete consolidation and (2) to find a correlation between the degree of consolidation and the ultrasonic velocity calculated from the phase slope. The system developed incorporated a pulsed ultrasonic interferometer, an oscilloscope, and a PC for automatic data logging and processing. Typical results from the ulstrasonic monitoring of consolidation in fresh concrete at an early age are presented, and correlation between the degree of consolidation and the ultrasonic velocity calculated from the phase slope is shown.