Determination of surface crack depth and repair effectiveness using Rayleigh waves

Determination of surface crack depth and assessment of repair effectiveness are two non trivial tasks. In the present work, certain correlations between energy related characteristics and crack depth are observed, leading to a multivariate estimation approach. After repair, the same wave parameters are used to characterize the efficiency of repair, since propagation is restored after successful epoxy injection. As for in-situ application, wave inspection is described on a cracked concrete bridge deck, where the cracks were repaired with epoxy agent. It is concluded that the investigation demonstrated the efficiency of the injection, since wave energy and velocity were restored.