Damage characterization in concrete using diffuse ultrasound

Parisa Shokouhi, Ernst Niederleithinger

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Diffuse ultrasonic measurements were used to characterize the state of stress-induced damage (volumetric microcracking) in concrete specimens. The test specimens were subjected to cycles of stepwise uniaxial compression. At each step, the loading (stress- or strain-controlled) was held constant and a series of ultrasonic measurements parallel and perpendicular to the loading were obtained. Unusually long signals were recorded, so that the diffuse ultrasonic regime tailing the coherent field could be studied. In the diffuse regime, the measured ultrasonic response is a superposition of reflections from scatters within concrete and thus, very sensitive to the changes in concrete microstructure. Using Coda Wave Interferometry (CWI), the evolution of diffuse velocity with the increasing load was monitored. The rate of change in the diffusion velocities was shown to be a good indication of the state of (low to medium intensity) damage in concrete.

Original languageEnglish (US)
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
Pages1477-1484
Number of pages8
Volume1430
Edition31
DOIs
StatePublished - Jul 13 2012
Event38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE - Burlington, VT, United States
Duration: Jul 17 2011Jul 22 2011

Other

Other38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE
CountryUnited States
CityBurlington, VT
Period7/17/117/22/11

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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