Deroo Frederik, Kim Jin-Yeon, Qu Jianmin, Sabra Karim, Jacobs Laurence J
School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0355, USA.
J Acoust Soc Am. 2010 Jun;127(6):3315-8. doi: 10.1121/1.3409480.
This letter demonstrates the potential for using diffuse ultrasound measurements to detect damage in concrete. Two different solutions to the diffusion equation, an infinite three-dimensional (3D) volume model that neglects geometric boundaries and a finite 3D cuboid model, are used for the required curve fitting procedure to determine the influence of geometric boundaries on the solution. The measurements consider two types of microcrack damage in concrete, alkali-silica reaction and thermal damage, and show that the measured diffusivity parameter is related to the amount of damage in each specimen.
