The University of Southampton
University of Southampton Institutional Repository

NDE of two-layered mortar samples using high-frequency Rayleigh waves

Goueygou, M., Piwakowski, B., Fnine, A., Kaczmarek, M. and Buyle-Bodin, F. (2004) NDE of two-layered mortar samples using high-frequency Rayleigh waves Ultrasonics, 42, (1-9), pp. 889-895. (doi:10.1016/j.ultras.2004.01.075).

Record type: Article

Abstract

The Spectral Analysis of Surface Waves (SASW) is a popular technique in seismics for imaging the ground subsurface. It uses the dispersive properties of Rayleigh waves in a transversely homogeneous, multilayered medium. The SASW approach is being transposed into the civil engineering domain to characterize subsurface damage in concrete structures. Such a damage consists in a few millimeters thick surface layer with porosity slightly higher than in the sound material. It is induced by contact with moisture or chemicals at the surface of the structure and may facilitate penetration of aggressive agents. In this study, two-layered mortar samples are made to mimic concrete cover damage in real structures. The dispersive behavior of Rayleigh waves arises when the wavelength is comparable to the thickness of the first layer. Given the small thickness of this layer, it requires increasing the frequency up to several hundreds of kHz, which means high attenuation and low signal-to-noise ratio. Rayleigh waves with 0.5 MHz central frequency are generated into the samples by the wedge method. Phase velocity dispersion curves are obtained by broadband phase spectroscopy from signals received at various distances from the source. The signal processing is first validated on simulated signals with known dispersion law. Then, the measured dispersion curves are compared with the theoretical curve for a two-layered medium, following Haskell's approach. The measured curve displays the general behavior expected from theory. However, a three-layered, visco-elastic model would be necessary to get a better fit and to estimate more accurately the parameters of each layer.

Full text not available from this repository.

More information

Published date: April 2004

Identifiers

Local EPrints ID: 57290
URI: http://eprints.soton.ac.uk/id/eprint/57290
ISSN: 0041-624X
PURE UUID: 2318313c-a63c-42ae-b5b9-3752d99adeeb

Catalogue record

Date deposited: 13 Aug 2008
Last modified: 17 Jul 2017 14:29

Export record

Altmetrics

Contributors

Author: M. Goueygou
Author: B. Piwakowski
Author: A. Fnine
Author: M. Kaczmarek
Author: F. Buyle-Bodin

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×