沥青胶结料与级配对超薄罩面混凝土高温性能的影响  

Effect of Asphalt Cementitious Material and Gradation Type on the High Temperature Performance of Ultra-thin Overlay Concrete

作　　者：蔡长峰 周德宝 孔古平 CAI Changfeng;ZHOU Debao;KONG Guping(Nanjing South Road and Bridge Construction Group Co.,Ltd.,Nanjing,Jiangsu 211314,China)

机构地区：[1]南京南部路桥建设(集团)有限公司,江苏南京211314

出　　处：《黑龙江交通科技》2024年第3期34-38,共5页Communications Science and Technology Heilongjiang

摘　　要：为探究胶结料与级配类型对设计厚度≤2.5 cm的超薄罩面的高温性能影响,设计AC-10C、SAC-10、ECA-10三种级配,分别采用70^(#)基质沥青和SBS改性沥青作为胶结料,形成六种沥青混合料组合进行车辙试验和动态蠕变试验研究。结果表明:胶结料的改变对混合料高温性能的影响要大于级配类型的改变;相比70^(#)基质沥青,SBS改性沥青能够较大程度提升混合料的高温性能;级配越粗、骨架密实结构更完善,高温性能更优。建议应用超薄罩面技术时,尽可能用高温性能优良的沥青,级配采用骨架密实结构。In order to explore the effect of asphalt and gradation type on the high temperature performance of ultra-thin overlays with a design thickness of≤2.5 cm.Based on the rutting test and dynamic creep test,70^(#) base asphalt and SBS modified asphalt were used as binders.And designed three gradations:AC-10C,SAC-10,ECA-10,and formed six kinds of asphalt mixture combinations for research.The results show that the change of the asphalt type has a greater effect on the high temperature performance of the mixture than the change of the gradation type.Compared with 70^(#) matrix asphalt,SBS modified asphalt can greatly improve the high temperature performance of the mixture.The coarser the gradation,the more perfect the skeleton is,and the better the high temperature performance.It is recommended to use asphalt with excellent high temperature as much as possible when applying the ultra-thin overlay technology,and use a dense skeleton structure for grading.

关 键 词：道路工程 超薄罩面 沥青胶结料 级配类型 高温性能 

分 类 号：U418.6[交通运输工程—道路与铁道工程]