Paper Title:
Evaluating Damage of Concrete with Nonlinear Ultrasonic and Acoustic Emission Techniques
  Abstract

In this research, the non-linear ultrasonic and acoustic emission techniques were used to evaluating damages induced in concrete under compression loading. Cubic concrete specimens were produced with three different w/c. The nonlinear ultrasonic evaluation was based upon measuring the change in fundamental amplitude with increasing damage and output power level. In acoustic emission testing technique 4 sensors were used to record the AE events under various loading and unloading cycles. An increase in AE hits was observed with increasing damage. Since concrete contains microcracks even under initial loading stages, none of the test specimens exhibited clear signs of the occurrence of Kaiser Effect. Normalized values of Felicity Ratio were plotted and compared with the nonlinear ultrasonic test data. A correlation between acoustic emission and nonlinear ultrasonic techniques in assessing damage growth in concrete was investigated.

  Info
Periodical
Key Engineering Materials (Volumes 452-453)
Edited by
A. Saimoto and M.H. Aliabadi
Pages
553-556
DOI
10.4028/www.scientific.net/KEM.452-453.553
Citation
A. A. Shah, Y. A. Al-Salloumrs, S. H. Al-Syed, "Evaluating Damage of Concrete with Nonlinear Ultrasonic and Acoustic Emission Techniques", Key Engineering Materials, Vols. 452-453, pp. 553-556, 2011
Online since
November 2010
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Price
$32.00
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