矿料级配对沥青混合料低温性能的影响  

Effect of aggregate gradation on performance of asphalt mix at low temperature

作　　者：张争奇[1] 赵战利[1] 张卫平[2] 

机构地区：[1]长安大学特殊地区公路工程教育部重点试验室,陕西西安710064 [2]陕西省公路局,陕西西安710068

出　　处：《长安大学学报（自然科学版）》2005年第2期1-5,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：陕西省自然科学基金项目(2003E229)

摘　　要：为了研究级配对沥青混合料低温性能的影响,探讨沥青混合料低温性能评价方法,借鉴SHRP和贝雷法级配初拟几种级配,对其低温性能进行了试验研究和比较,并推荐了低温性能好的级配。在分析沥青路面低温开裂机理和分析试验结果的基础上,提出了沥青混合料低温性能的合理评价方法,认为沥青混合料低温收缩性和低温柔性是反映沥青路面低温抗裂性能的2个方面,小的收缩性和高的低温柔性使沥青混合料具有较高的抗低温开裂的潜能;应综合收缩系数和低温破坏应变2个指标评价沥青混合料低温性能。The effect of aggregate gradation on the performance of asphalt mix at low temperature is ignored longtime, and its evaluation methods are also in controversy. The effect of aggregate gradations on the property of asphalt mix was studied and the test methods evaluating the performance of asphalt mix at low temperature was probed. Several gradations were tested and evaluated, based on test results, the proper gradation of anti-cracking mixture was put forward. Through analyzing the mechanism of asphalt pavement cracking and test results, the shrinking character and flexibility of asphalt mix were thought as two main factor related to pavement cracking, the shrinking parameters and low-temperature stress were recommended to evaluate the performance of mix at low temperature.

关 键 词：道路工程 沥青混合料 矿料级配 低温性能 评价方法 

分 类 号：U414.3[交通运输工程—道路与铁道工程]