欧洲岩沥青改性沥青混合料使用性能试验研究  

Experimental Study on Performance of European Rock Asphalt Modified Asphalt Mixture

作　　者：曾梦澜[1] 朱艳贵 田伟[1] 谢学成 ZENG Menglan ZHU Yangui TIAN Wei XIE Xuecheng(College of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2017年第7期156-161,共6页Journal of Hunan University:Natural Sciences

基　　金：湖南省交通运输厅科技进步与创新计划项目(201110)~~

摘　　要：为研究欧洲岩沥青改性沥青混合料的使用性能,制备了最大掺量达20%的欧洲岩沥青改性沥青,进行了AC-20C不同掺量改性沥青混合料的配合比设计,根据各掺量最佳油石比制作试件并进行了混合料使用性能试验.根据试验结果分析了不同掺量改性沥青混合料的动稳定度、马歇尔稳定度、流值、马歇尔模数、浸水残留稳定度、冻融劈裂残留强度比、弯曲破坏应变、15℃和20℃抗压回弹模量和15℃劈裂强度等技术参数.试验结果表明,随着欧洲岩沥青掺量的增加,改性沥青混合料的高温稳定性、水稳定性逐渐得到提高,刚度和强度逐渐增大.随着欧洲岩沥青掺量的增加,改性沥青混合料的低温抗裂性先提高至一峰值后略有回落.考虑综合性能,推荐的欧洲岩沥青最佳掺量为10%~20%.In order to investigate the performance of European rock asphalt modified asphalt mixture, modified asphalt binder containing up to 20% of European rock asphalt was prepared. Design of AC-20C modified asphalt mixture with different percentages of rock asphalt was conducted.Performance tests were carried out on the specimens with optimum asphalt contents of respective percentages of rock asphalt.Based on the test results, the properties such as dynamic stability, Marshall stability, flow value, Marshall quo- tient,retained Marshall stability,indirect tensile strength ratio, flexural tensile strain, compression moduli at 15 ~C and 20 ~C ,and indirect tensile strength at 15 ~C were analyzed.The analyses indicate that with the increasing percentage of rock asphalt, the high temperature stability and the moisture susceptibility of the modified asphalt mixture wer improved,and the stiffness and strength of the modified asphalt mixture in- creased.With the increasing percentage of rock asphalt, the low-temperature cracking resistance of the modified asphalt mixture increased to the peak value, and then fell down slightly.Considering the overall performance, the recommended optimum use of European rock asphalt in the modified asphalt binder ranged from 10% to 20%.

关 键 词：欧洲岩沥青 改性沥青混合料 使用性能 试验研究 

分 类 号：U416.217[交通运输工程—道路与铁道工程]