Please read:
Cement-based Materials' Characterization using Ultrasonic Attenuation
By: Punurai, Wonsiri
Please read:
Cement-based Materials' Characterization using Ultrasonic Attenuation
By: Punurai, Wonsiri
Dear Nabil:
Please see the following references.
P. Anugonda, J. S. Wiehn and J. A. Turner (2001). Diffusion of ultrasound in concrete. Ultrasonics. 39(6): 429-435. https://doi.org/10.1016/S0041-624X(01)00077-4.
S.K. Ramamoorthy, Y. Kane, and J. A. Turner (2004). Ultrasound diffusion for crack depth determination in concrete. The Journal of the Acoustical Society of America. 115(2): 523. https://doi.org/10.1121/1.1642625.
T.P. Philippidis and D.G. Aggelis (2005). Experimental study of wave dispersion and attenuation in concrete. Ultrasonics. 43(7): 584-595. https://doi.org/10.1016/j.ultras.2004.12.001.
M. Chekroun, L. Le Marrec, O. Abraham, O. Durand and G. Villaina (2009). Analysis of coherent surface wave dispersion and attenuation for non-destructive testing of concrete. Ultrasonics. 49(8): 743-751. https://doi.org/10.1016/j.ultras.2009.05.006.
I hope that this helps you.
Arturo
Dear Nabil,
It depends on the frequency of the emitted signal. The microstructure of concrete is responsible for absorption, and to affect the microstructure a very high frequency signal is needed. A study by Nakahata et al. shows that even for a 400 kHz signal attenuation due to absorption is insignificant. While the attenuation due scattering by aggregates and air voids becomes considerable when the frequency is higher than 150 kHz. You can check our new paper for scattering attenuation curves in the 20-150 kHz frequency range.
Aziz
Nakahata, K., Kawamura, G., Yano, T., & Hirose, S. (2015). Three-dimensional numerical modeling of ultrasonic wave propagation in concrete and its experimental validation. Construction and Building Materials, 78, 217-223.
You can find it here:
https://pdfs.semanticscholar.org/fece/fdd4c7a7ccab836452f7181712e78b03ada8.pdf
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