摘要
沥青混合料的低温缩裂是沥青路面的主要病害,因此提出合理的研究和评价沥青混合料低温性能的方法和指标,以控制或消除沥青路面的低温收缩裂缝是一个重要研究课题。分析表明,低温约束冻断试验(约束试件温度应力试验TSRST)能够准确模拟沥青路面在降温过程中的开裂过程,文章介绍了该试验方法,提出了相应的低温开裂评价指标,并利用该试验方法对AC-13、AC-16、AC-20沥青混合料的低温抗裂性能进行了评价分析。
Low temperature cracking is one of the main distress of asphalt pavement and as a result the development of its evaluation test method and indexes is the key for relevant research projects.It is concluded that TSRST test is a test method which can simulate the low temperature cracking process of asphalt in pavement well according to the analysis.Therefore,the method is used in this study.The relevant evaluation index for low temperature cracking is developed and a number of asphalt mixes such as AC-13,AC-16 and AC-20 are evaluated accordingly.
基金
北京市自然科学基金资助项目(3073016)
北京市强教计划项目(JE10016200621)
关键词
沥青混合料
低温开裂
约束冻断试验
评价指标
性能分析
asphalt mixture
low-temperature cracking
TSRST test
evaluation index
comparison test and analysis
