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 language | English (US) |
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Title of host publication | Review of Progress in Quantitative Nondestructive Evaluation |
Pages | 1477-1484 |
Number of pages | 8 |
Volume | 1430 |
Edition | 31 |
DOIs | |
State | Published - Jul 13 2012 |
Event | 38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE - Burlington, VT, United States Duration: Jul 17 2011 → Jul 22 2011 |
Other
Other | 38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE |
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Country/Territory | United States |
City | Burlington, VT |
Period | 7/17/11 → 7/22/11 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy