Ultrasonic Through Transmission Technique for Evaluation of Structural Integrity of Concrete in Nuclear Facilities

摘要

The repeatability of ultrasonic pulse velocity is expected to be much better than other methods of inplace strength evaluation of concrete. Fifteen cube speciments (150mm, M20 rade) were tested and ultrasonic through transmission measurements were made at different stress levels by indigenously developed PC based system. Onset of macrocracign in crushing model is indicated by about 10