@inproceedings{d553d8c84cd54abf8ff5522fd808ec28,
title = "Damage detection in concrete using diffuse ultrasound measurements",
abstract = "Heterogeneities in concrete caused by the random distribution of aggregate in the cement-paste matrix lead to strong scattering of ultrasonic waves at wavelengths on the order of the aggregate. Use of these high frequencies is necessary to detect damage at an early stage, something that is not possible with conventional ultrasonic methods. The ultrasound energy density in that regime can be described by the diffusion equation. The objective of this research is to develop a quantitative understanding of the effects of additional scattering sources, such as small cracks in the cement-paste matrix, on the parameters of the diffusion equation; these parameters are the diffusion and the dissipation coefficients. Applying diffusion theory, the diffusivity and dissipation coefficients are experimentally determined as functions of frequency using ultrasonic waves. The cuboid shaped samples employed are made of a Portland cement-paste matrix and regular aggregate, such as gravel and sand. The results provide a basic understanding of repeatability and consistency of diffusion measurements, with an emphasis on the nondestructive evaluation of concrete.",
keywords = "ASR, Concrete, Diffuse, Ultrasonic waves",
author = "Frederik Deroo and Jacobs, {Laurence J.} and Kim, {Jin Yeon} and Jianmin Qu and Karim Sabra",
year = "2010",
doi = "10.1063/1.3362247",
language = "English",
isbn = "9780735407480",
series = "AIP Conference Proceedings",
pages = "1509--1516",
booktitle = "Review of Progress in Quantitative Nondestructive Evaluation",
note = "36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE ; Conference date: 26-07-2009 Through 31-07-2009",
}