Diagnosing in Situ Concrete by ultrasonic Pulse Technique

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Title: Diagnosing in Situ Concrete by ultrasonic Pulse Technique

Author(s): H. W. Chung and K. S. Law

Publication: Concrete International

Volume: 5

Issue: 10

Appears on pages(s): 42-49

Keywords: compressive strength; damage; field tests; fires; nondestructive tests; reinforced concrete; statistical analysis; ultrasonic tests; voids.

Date: 10/1/1983

Abstract:
Describes field applications of the ultrasonic pulse velocity technique in testing concrete, using the portable V-meter. Effects of mix proportions, reinforcing bars, and voids are examined. Methods of assessing the uniformity of concrete and detecting voids or honeycombs are discussed. A semiempirical approach is proposed for estimating concrete strength from pulse velocity measurement. A process is also suggested to approximately assess the fire damage of concrete.*