高速交通条件对沥青路面疲劳性能的影响

Effect of High Speed on the Fatigue Performance of Asphalt Pavement

在 MTS8 1 0材料试验系统上进行大量的疲劳试验 ,综合考虑高速行车时 ,车辆荷载的增大和作用时间的减小对沥青混合料疲劳性能的影响 ,探求车辆行驶速度与沥青混合料疲劳性能的关系 ,以及在高速交通条件下提高沥青混合料疲劳性能的主要措施。研究表明 ,高速行驶的车辆对路面的疲劳破坏比低速行驶时更加严重。高速交通条件下 ,轻载车辆对路面的疲劳破坏也不容忽视。为了提高沥青混合料的疲劳性能应该选用粘度较大的沥青和合适的矿料级配 。

Fatigue tests of control stress mode using MTS810 were done on the asphalt mixture to analyze the relationship between vehicle velocity and fatigue performance of asphalt pavement and seek better methods to improve the fatigue performance of asphalt mixture under the condition of high speed. It is shown that high-speed vehicles make heavier damage to the asphalt pavement than that low-speed and the damage of light car to the pavement fatigue shouldn't be neglected. Stiffer asphalt and appropriate aggregate gradation with asphalt should be used to improve the fatigue performance of asphalt mixture.