Construction and pavement properties after seven years in porous asphalt with long life

•Pavement properties after seven years.•Construction by Kyoto Specifications.•Factors of long life in porous asphalt.•Relation between rut depth and temperature. This paper describes the construction and pavement properties after seven years in porous asphalt with long life in Kyoto Jukan Expressway, comparing with conventional methods. It was constructed in 1998 in accordance with various kinds of specifications (Kyoto Specifications), regarding modified binder, aggregate, asphalt mixture, asphalt plant, construction machine and construction method. It consists of four different sections in pavement and they were constructed in order to aim the long life and to evaluate their effects on the life in porous asphalt. In this study, it was described construction and pavement properties including with effects of water content of materials on temperature in porous asphalt in Kyoto Jukan Expressway and relation between local rut depth and local cooling on surface after finishing in dense type mixture. It was concluded that the long life in porous asphalt related to the quality of materials, uniformity of surface temperature after finishing, cubic stone in porous asphalt, and local temperature on pavement surface after finishing connected with local rut depth in dense type mixture.