| Currently, the quality of pavement is evaluated by examining the surfacedeformation and deflection, either visually, or by an automated pavement surface measuringdevice. However, these methods evaluate only the pavement surface or estimate the quality ofeach layer. In this study, we developed a technique for three-dimensionally diagnosing thecauses and degrees of pavement damage. A 3-D crack analysis of each sample was conductedusing a CT scanner and a 3-D void analysis program. 3-D images of in-situ specimens showedthat longitudinal cracking occurred not from the surface or bottom, but from within thepavement. The technique can thus be used to directly identify the 3-D pavement damage ofeach layer; it can easily and precisely diagnosis the position and level of damage in asphaltconcrete pavement. |
