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Diffusion of ultrasound in concrete

✍ Scribed by Phanidhar Anugonda; Joshua S. Wiehn; Joseph A. Turner

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
172 KB
Volume
39
Category
Article
ISSN
0041-624X

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✦ Synopsis

The propagation and scattering of ultrasound in concrete is discussed. The heterogeneous composition of concrete causes the ultrasound to scatter considerably. In the limit of many scattering events, the ultrasonic energy density in circular cylinders of concrete is shown to evolve in accordance with a one-dimensional diusion equation. The ultrasonic diusivity and dissipation are measured experimentally over the frequency range of 100Β±900 kHz. Theoretical descriptions of the diusivity are in accord with the experimental values. Such frequencies are well above typical frequencies used for concrete inspection. Thus, it is anticipated that the use of these higher frequencies will result in new techniques for characterizing material properties and damage in concrete structures.

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