Speaker
Description
Abstract. Early rehabilitation is considered an ideal strategy for managing road pavements, as it is expected to ensure longer durability to minimize the life-cycle cost. However, such a practice has not much been adopted, so its effectiveness is even difficult to understand. As a step toward imple-mentation, how many years rehabilitated pavement have so far sustained was investigated, using NEXCO-PMS, which collects not just road surface monitoring data but also all segments of pavement repair projects for dec-ades. In categorizing the projects into groups that have the same rehabilita-tion history on a Japanese toll roadway, a tendency that earlier dates of re-habilitation give longer durability in problematic sections was confirmed, with the assumption that bearing capacity of porous pavement deteriorates fast. It was also revealed that control of road surface indices such as rutting and crack ratio at a lower level is essential. Moreover, in sections where re-habilitation is forced to be done repeatedly, it is important to keep crack ra-tio at a lower level to achieve earlier rehabilitation.
