Acoustic Emission Behavior of Concrete

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Title: Acoustic Emission Behavior of Concrete

Author(s): P.F. Mlakar, R.E. Walker, B.R. Sullivan, and V.P. Chiarito

Publication: Special Publication

Volume: 82

Issue:

Appears on pages(s): 619-638

Keywords: acoustic emission; nondestructive tests; pipes (tubes); reinforced concrete; stresses; vibration.

Date: 9/1/1984

Abstract:
The acoustic emissions of various concrete specimens under different loadings are studied. First, six monotonic and six cyclic load compression tests on 6- by 12-in. cylindrical concrete specimens were monitored for acoustic emission. Fundamental data were collected and analyzed and the Kaiser effect was observed. The data are presented as counts versus events to aid in the identification of source characteristics. Next, one multiaxial load (compression and tension) test was monitored. The slope of the counts- versus-events curve for this primarily tension test differed from those of the curves for the compression test. This difference suggests that the source characteristics of concrete acoustic emissions can be empirically separated and identified. Finally, the emissions detected in a model of a reinforced concrete circular conduit