沥青混合料加速加载试验车辙隆起变形的研究

Research on Hump of Asphalt Mixture Pavement by Accelerating Loading Facility

通过对AC型沥青混合料进行加速加载试验,探究混合料公称最大粒径、温度、荷载条件的变化对沥青混合料路面隆起变形的影响以及隆起变形占总车辙变形的比例。结果表明,用车辙变形面积来评价车辙隆起变形与采用车辙深度来评价车辙隆起变形具有较好的一致性;不同大小的荷载作用下隆起变形的程度受温度的影响显著,高温会导致车辙隆起变形迅速变大;隆起比例只与最终车辙变形总量有关,隆起比例最终值为0.6。

To research humps of asphalt mixtures and proportions of hump under the conditions of different types of mixtures, temperatures and loads, we carried out Accelerated Loading Test on AC-Type asphalt mixture pavement. The results shows that it has little difference to evaluate humps between depth and area of rut deformation; high temperature will lead to a rapid expanding of humps; deformation of hump is affected by temperature remarkably with different loads; hump proportion only depends on total deformation of rut and the ultimate value of is 0.6.