Abstract
A promising nondestructive concrete surface-breaking crack depth inspection technique is the self-calibrating surface wave transmission method. In part due to measurement data variability, however, there is difficulty in using the transmission function cut-off frequency to determine crack depth. In this paper, the proposed method for concrete structure crack-depth estimation is the spectral wave-energy transmission method employing the self-calibrating configuration. The authors report of experimental study results concerning concrete slab with varying crack (notch) depths. Validation of the proposed method's effectiveness is performed through conventional time-of-flight and cut-off frequency-based methods comparison. That, for concrete structure in-place depth estimation, there is excellent potential for spectral energy transmission to be a practical and reliable in-lace nondestructive method is shown in the results.
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