The Influence of Reinforcement on Ultrasonic Pulse Velocity Testing


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Title: The Influence of Reinforcement on Ultrasonic Pulse Velocity Testing

Author(s): J.H. Bungey

Publication: Special Publication

Volume: 82


Appears on pages(s): 229-246

Keywords: measurement; nondestructive tests; reinforced concrete; reinforcing steels; ultrasonic tests.

Date: 9/1/1984

Embedded reinforcement may have a significant effect on ultrasonic pulse velocity measurements taken through structural concrete members. Reliable corrections are essential if test locations cannot avoid the influence of the steel. Extensive laboratory experimental work demonstrates major shortcomings in all currently accepted allowance procedures and confirms that bar diameter is an essential variable to be incorporated. The effect of bars passing across the pulse path is shown to be less than for bars of similar size running along the path. A correction procedure is proposed which can meet many practical combinations of bar size, bar orientation and concrete properties with significantly greater accuracy than possible by established methods.