0引言在世界各国已建成的公路中,水泥混凝土路面被沥青路面取代,所占比例逐渐缩小。沥青路面对于行车具有油耗低、噪音小、抗滑性好、车辆磨损小等优点,在高速公路、机场跑道、桥面铺装、城市干道等主要道路中得到广泛应用。自从1988年沪嘉高速通车以来,中国高速公路长期处于飞速扩建状态, 0 Introduction In all the countries in the world have been built in the road, the cement concrete pavement replaced by asphalt pavement, the proportion gradually reduced. Asphalt pavement has the advantages of low fuel consumption, low noise, good skid resistance and low wear of vehicles. It is widely used in the main roads such as expressways, airport runways, bridge deck pavement and urban trunk roads. Since the opening of Shanghai-Jiaxing Expressway in 1988, China’s expressway has been in a state of rapid expansion for a long time.