Development and Challenge of the Overlay Design for Old Cement Concrete Pavement

With the development of sensor, signal acquiring and processing technologies, amounts of overlay design methods for old cement concrete pavement have been proposed. However, there are difficulties in applying these methods to the real pavement under the long-term operational environments. In this study, the research achievements for resisting the generation and extension of reflection cracks of the old cement concrete pavement, developed over the last couple of decades and their applications, were summarized firstly, and then the primary challenge in applying these methods was discussed.