MECHANICAL BEHAVIOR OF CONCRETE EXAMINED BY ULTRASONIC MEASUREMENTS

SP SHAH SP*, S CHANDRA S

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

The velocity and attenuation of ultrasonic pulses transmitted across concrete and paste specimens subjected to various mechanical loads were measured and compared with surface strains and internal microcracking. Pulse velocity decreased with increasing length of cracks. Increasing the resonant frequency of the piezoelectric crystals increased the pulse velocity and the sensitivity of the ultrasonic measurements to crack growth. For monotonically increasing loading of concrete specimens, it was observe%d that prior to failure pulse vel%ocity and mplitude started to continuously decrease and volume to dilate, indicating internal crack growth. It was inferred from ultrasonic measurements and substantiated by microscopic examination that the cyclic and sustained loading of concrete results in two stages of crack growth.

Original languageEnglish (US)
Pages (from-to)550-563
Number of pages14
JournalJ Mater
Volume5
Issue number3
StatePublished - 1970
Externally publishedYes

ASJC Scopus subject areas

  • General Engineering

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