Abstract
Durability of pavement is a fundamental technical issue. The Chuo Expressway Fuchu Pavement Section has been in service and in good condition for more than 20 years without any repair work. The reason for high durability of this pavement was investigated analytically and experimentally. It is concluded that the key is the proportion of asphalt mixture of the surface course. Our calculation formula for appropriate voids in mineral aggregate proposed in another paper was introduced to the asphalt mixture design. This procedure is also applicable to a variety of pavement mixtures, and universality of the calculation fomula is further demonstrated.
