以压实参数和间接拉伸强度评价沥青混合料抗车辙性能  

Using Compaction Parameters and Indirect Tensile Strength to Evaluate Asphalt Concrete Rutting Potential

作　　者：张华[1] 李宇峙[1] 李映萍[1] 

机构地区：[1]长沙理工大学公路工程学院,湖南长沙410076

出　　处：《公路工程》2008年第2期54-57,63,共5页Highway Engineering

摘　　要：车辙,又可称为永久变形,是沥青路面的主要破坏形式之一。沥青混合料的破坏过程可由莫尔—库仑破坏理论分析。这种理论认为材料的剪切强度是由粘聚力和内摩阻力共同提供的。间接拉伸试验测出的间接拉伸强度IDT可以较好的表征混合料的粘聚力,但它却无法提供集料内摩擦角的信息。从旋转压实仪(SGC)获得的压实参数可以提供集料内摩擦角的信息,但却无法表征粘聚力。因此,同时利用压实参数和IDT强度来评价沥青混合料的抗车辙性能是可能的。研究表明:从APA车辙试验评估的沥青混合料的抗车辙性能,可以回归为从SGC得到的压实参数、混合料的体积参数以及用马歇尔稳定度仪进行间接拉伸试验获得的IDT强度的函数。Rutting, or permanent deformation, is one of the main failure mechanisms for asphalt concrete pavements. The behavior of asphalt concrete can be analyzed by the Mohr-Coulomb failure theory. This theory predicts that the strength of a material such as asphalt concrete depends upon both cohesion and internal friction. The indirect tensile strength （IDT strength） test is a measure of tensile strength and a good indicator of mixture cohesion. The compaction parameters, which is derived from SGC, would provide information on the angle of internal friction, Ф, but not on cohesion, c. Thus the use of compaction parameters, along with IDT strength can provide an indicator of rutting resistance of an asphalt mixture. The sturdy of this paper verified the rutting resistance of an asphalt mixture, as determined from the asphalt pavement analyzer （APA） , is a function of the compaction parameters as derived from the SGC, volumetric properties and the IDT strength of the mix, as evaluated from Marshall Stabilometer.

关 键 词：沥青混合料 车辙 间接拉伸强度 压实参数 

分 类 号：U418.68[交通运输工程—道路与铁道工程]