【摘要】 为了明确沥青路面低温性能研究现状,对沥青路面低温开裂研究进行了概述,总结了沥青低温性能评价指标,从预估沥青混合料开裂温度、沥青混合料应力应变及能量指标三个角度综述了沥青混合料低温评价指标,分析了测试方法和适用性。结果表明:临界开裂温度及劲度模量更适合评价沥青低温性能,基于断裂力学提出的断裂能指标改变了以往从单一应力或应变角度进行评价的状况,评价效果更好;半圆弯曲试验及圆盘紧凑拉伸试验由于操作简单、试件易制,具有更好的实际应用价值。更多还原

【Abstract】 In order to clarify the research status of asphalt pavement low temperature performance,this paper summarizes the research on low-temperature cracking of asphalt pavement,summarizes the evaluation indexes of asphalt low-temperature performance,summarizes the evaluation indexes of asphalt mixture lowtemperature performance from three aspects of predicting cracking temperature,stress-strain and energy indexes of asphalt mixture,and analyzes the test methods and applicability.The results show that the critical cracking temperature and stiffness modulus are more suitable for evaluating the low temperature performance of asphalt,and the fracture energy indexes based on fracture mechanics change the previous situation of evaluating asphalt from a single stress or strain angle,and evaluation effect is better.Semicircle bending test and disc compact tensile test have better practical application value because of their simple operation and easy preparation of specimens.更多还原