超薄磨耗层用开级配小粒径透水沥青混合料的研制  

Development of Open Graded Permeable Bituminous Mixture with Small Aggregate Size for Ultra-thin Friction Course

作　　者：吴忠青 WU Zhongqing

机构地区：[1]上海公路桥梁(集团)有限公司,上海200433 [2]上海绿色路面材料工程技术研究中心,上海201901

出　　处：《上海公路》2022年第2期120-124,M0008,共6页Shanghai Highways

基　　金：上海市科委科研计划项目(19DZ1204205)。

摘　　要：超薄磨耗层是一种有效的道路预防性养护方法。现研发了一种用于超薄磨耗层用开级配、公称最大粒径为4.75 mm的透水沥青混合料,并对其力学性能、空隙率和连通空隙率以及渗水系数试验结果作了系统评价。此外,为得到准确的空隙率计算结果,提出了小粒径沥青混合料的矿料合成毛体积相对密度和沥青混合料理论最大相对密度计算方法,有利于细粒径透水沥青混合料在超薄磨耗层中的推广应用。The ultra-thin friction course(UTFC)is an effective method for the pavement preventive maintenance.An open graded permeable bituminous mixture with nominal maximum aggregate size(NMAS)of 4.75 mm used for UTFC has been designed.Its mechanical properties,air voids and connected air voids,as well as permeability coefficient are investigated.In addition,in order to obtain accurate experimental result of air voids,calculation methods for the combined bulk specific gravity of aggregates and the theoretical maximum specific gravity of bituminous mixture with small aggregate size are proposed.

关 键 词：超薄磨耗层 开级配 小粒径 透水沥青混合料 高黏度改性沥青 

分 类 号：U414[交通运输工程—道路与铁道工程]