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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Concrete Subsurface Crack Characterization by Means of Surface Rayleigh Wave Method
Author(s): Foo Wei Lee, Hwa Kian Chai, Kok Sing Lim, and See Hung Lau
Publication: Materials Journal
Appears on pages(s): 113-123
Keywords: amplitude; excitation frequency; Rayleigh wave; reinforced concrete; subsurface crack; velocity
Abstract:A multichannel linear array Rayleigh wave (R-wave) methodology is studied for evaluating subsurface cracks on concrete. Numerical simulations were first conducted to understand the propagation of R-waves in steel-reinforced concrete comprising subsurface cracks with different depths and lengths followed by a series of experimental measurements on concrete samples with induced artificial subsurface cracks. The changes in R-wave amplitude and velocity were analyzed to obtain correlations with the crack depth-to-wavelength/length-to-wavelength ratio. Results revealed that the difference between the estimated and actual characteristics of subsurface cracks (crack length and depth) was less than ±20%, showing a possibility for using R-wave methodology to assess subsurface cracks in reinforced concrete with the proposed acquisition, extraction, and analysis methodology.
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