Effect of Geosynthetics in Asphalt Pavement Base Course on Bearing Reinforcement

It is an important issue to reduce the life cycle cost of Asphalt (As) pavement, which has a huge stock of more than 1.2 million km in Japan, in order to maintain and manage it. In this research, geosynthetics are installed in the base course to propose measures to extend the service life of As pavements by reinforcing the base course. In this paper, each material property was determined from friction property tests of geosynthetics and triaxial compression tests of silica sand. In addition, the effect of reinforcing the bearing capacity of the base course by laying geosynthetics was examined from both model experiments and analysis using loading tests in a small soil tank and FEM analysis. As a result, it was confirmed that the bearing capacity was increased by placing geosynthetics in the soil.