Journal Published Online: 01 November 1977
Volume 5, Issue 6

Acoustic Emission of Plain Concrete

CODEN: JTEVAB

Abstract

When a specimen of engineering material is subjected to external loads, stress waves known as acoustic emissions are induced. A unique characteristic of many engineering materials that emit acoustical energy is that upon reloading the specimen does not emit acoustical energy until the magnitude of loading exceeds the prior maximum loading. This investigation was undertaken to determine if this characteristic could be used to disclose the loading history of plain portland cement concrete. The test results show that the unique characteristic is very temporary and therefore cannot be used to determine the prior maximum loading on a concrete specimen. Within a matter of hours concrete subjected to loading within its elastic limit recovers, and acoustical energy may again be released by reloading.

Author Information

Nielsen, J
Soils and Pavements Division, Civil Engineering Research Facility, University of New Mexico, Campus Post Office, Albuquerque, N. Mex.
Griffin, DF
Civil Engineering Research Facility, Ventura, Calif.
Pages: 8
Price: $25.00
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Stock #: JTE10561J
ISSN: 0090-3973
DOI: 10.1520/JTE10561J