In assessing the existing condition of a pavement structure, locations of past maintenance activities are often overlooked, or concealed by rehabilitation activities such as mill and overlays. Potential problem areas may not be evident at the time of evaluation, and if ignored could increase the rate of deterioration of the pavement structure. Ground penetrating radar (GPR) can be used as a tool for assessing the condition of the pavement structure at locations of surface distress, as well as identifying locations of previous subsurface maintenance activities that are not visible at the surface of the pavement. This paper presents and discusses the subsurface imagery obtained from a GPR survey, identifies several potential subsurface problem areas, and describes the benefits of applying this technology as an assessment tool for the rehabilitation of roadways. For the covering abstract of the conference see ITRD number E211521.
Samenvatting