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Acoustic emission monitoring of concrete structures



Title: Acoustic emission monitoring of concrete structures
Author(s): R.J. Lark, R. Pullin, K.M. Holford
Paper category : conference
Book title: RILEM Symposium on On Site Assessment of Concrete, Masonry and Timber Structures - SACoMaTiS 2008
Editor(s): L. Binda, M. di Prisco, R. Felicetti
Print-ISBN: 978-2-35158-061-5
e-ISBN: 978-2-35158-075-2
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 201 - 210
Total Pages: 10
Nb references: 10
Language: English


Abstract: Great interest has been shown in the application of acoustic emission [AE] testing for monitoring and assessing the health of concrete structures. However, a number of difficulties have been experienced in the interpretation of such data due to the attenuation of signals; the apparent dependency of signal wave velocities on the composition of the concrete and source to sensor distances; the complex mechanics of crack propagation in cementitious composites and the noise generated by effects such as the fretting and rubbing of existing crack surfaces.
This paper reviews a range of experimental studies that have been undertaken at Cardiff over the last five years aimed at addressing the above issues. It is shown that sensor type, location, and threshold level are critical for the reliable identification of deterioration.
Likewise, it is demonstrated that source location and classification techniques are highly dependent on the objectives of the study and the configuration of the test set-up. It is suggested that probabilistic based techniques offer a more realistic approach to the interpretation of such data and the application of such techniques is discussed.


Online publication: 2009-05-26
Publication type : full_text
Public price (Euros): 0.00


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