超高模量沥青混凝土的制备与路用性能研究  

Study on preparation and pavement performance of ultra-high modulus asphalt concrete

作　　者：李九苏[1] 保安青 姜舜君 LI Jiusu;BAO Anqing;JIANG Shunjun(School of Traffic&Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114

出　　处：《交通科学与工程》2023年第2期8-15,共8页Journal of Transport Science and Engineering

基　　金：国家自然科学基金资助项目(52178411);长沙市自然科学基金资助项目(2021cskj007)。

摘　　要：针对高模量沥青混凝土(HMAC)在重复重载作用下出现的车辙及低温开裂等问题,用两种沥青胶结料(高黏度沥青、30#硬质沥青)和两种细集料(石英砂、金刚砂)制作3种级配(EME-14、AC-13、SMA-10)的超高模量沥青混凝土(UHMAC)进行试验,研究不同沥青胶结料和细集料及掺量对UHMAC的影响。试验结果表明:高黏度沥青胶结料可进一步提高UHMAC的高温抗车辙性能,且其低温抗开裂性较30#硬质沥青胶结料的更好;以金刚砂为细集料的UHMAC耐高温性好,金刚砂对UHMAC动态模量的良性影响大于石英砂的;最优配比的UHMAC的动态模量可达28956 MPa,为规范要求的2.07倍,且其高温性能、低温性能和抗水损性能均较优异。Aiming at the problems of rutting and low temperature cracking of high modulus asphalt concrete(HMAC)induced by the repeated heavy load,the influence of the asphalt binder,fine aggregate type and content on the pavement performance of the UHMAC was studied.To prepare three gradation types(EME-14,AC-13,SMA-10)of ultra-high modulus asphalt concrete specimens,two kinds of asphalt binders(high viscosity asphalt and 30#original asphalt)and two kinds of fine aggregates(quartz sand and carborundum)are designed.The test results show that,the hightemperature rutting resistance performance of the UHMAC can be improved further by high viscosity asphalt,and the low-temperature cracking resistance performance is better than that of 30#original asphalt concrete.The HMAC with carborundum sand has good high-temperature resistance performance,and the positive effect on the dynamic modulus of the UHMAC is greater than that of quartz sand.The dynamic modulus of the UHMAC with optimal proportion can reach 28956 MPa,that is about 2.07 times of the specification requirement.Furthermore,the high temperature performance,low temperature performance and anti-water damage property are also excellent.

关 键 词：动态模量 车辙 高温性能 路用性能 

分 类 号：TU528.42[建筑科学—建筑技术科学]