摘要
为研究RA,PR.M和BRA 3种高黏剂对沥青混合料路用性能的影响,对水-温耦合作用下的工程上常用的AC-13C和AC-20C两种密级配沥青混合料展开了研究。从矿料级配类型、高黏剂、含水率、试验温度等方面对高模量沥青路面的高温抗车辙性能、抗疲劳性能进行了研究。结果表明:当级配类型相同时,高黏剂的种类及掺量对沥青混合料最佳油石比的影响不大。在相同条件下,AC-20C沥青混合料的吸水率及高温抗车辙能力明显大于AC-13C沥青混合料的,且掺入RA高黏剂的沥青混合料的高温抗车辙能力整体最优。随着试验温度的升高、加载应力及吸水率的增大,沥青混合料AC-13C和AC-20C的疲劳寿命均有所缩短;在低温、低应力条件下,AC-13C沥青混合料的疲劳寿命长于AC-20C沥青混合料的。
In order to study the influence of three kinds of high viscosity agents RA,PR.M and BRA on the road performance of asphalt mixture,two kinds of dense-graded asphalt mixtures AC-13C and AC-20C,which were commonly used in engineering,were researched under the action of water-temperature coupling.The performance of high temperature anti-rutting and anti-fatigue of high modulus asphalt pavement was studied from the aspects of gradation type of mineral aggregate,high viscosity agent,moisture content,test temperature,etc.The research results show that when the gradation type is the same,the type and content of high viscosity agent have little effect on the optimal oil-stone ratio of asphalt mixture.Under the same conditions,the water absorption and high temperature anti-rutting of AC-20C asphalt mixture are significantly greater than that of AC-13C asphalt mixture,and the high temperature anti-rutting performance of asphalt mixture adding RA high viscosity agent is the best as a whole.With the increase of test temperature,loading stress and water absorption,the fatigue lives of AC-13C and AC-20C asphalt mixtures are shortened.The fatigue life of AC-13C asphalt mixture is longer than that of AC-20C asphalt mixture under low temperature and low stress.
作者
宁毅
李文凯
刘向杰
NING Yi;LI Wen-kai;LIU Xiang-jie(Henan Zhongzhou Road and Bridge Construction Co.,Ltd.,Zhoukou 466000,China;Henan Jiaoyuan Engineering Technology Group Co.,Ltd.,Zhengzhou 450003,China;Henan College of Transportation,Zhengzhou 450000,China)
出处
《长沙理工大学学报（自然科学版）》
CAS
2021年第2期17-25,共9页
Journal of Changsha University of Science and Technology:Natural Science
基金
国家自然科学基金资助项目(51408553)
河南省重点科技攻关计划项目(152102210033)。
关键词
矿料级配
油石比
高模量沥青混合料
水-温耦合
路用性能
mineral aggregate gradation
oil-stone ratio
high modulus asphalt mixture
water-temperature coupling
road performance
