特立尼达湖沥青(TLA)改性沥青高温车辙因子修正系数  

Correction Coefficient of High Temperature Rutting Factor for TLA Modified Asphalt

作　　者：孔令云[1] 罗雅丹[1] 莫石秀 代笠[1] 

机构地区：[1]重庆交通大学交通土建工程材料国家地方联合工程实验室,重庆400074 [2]广东省路桥建设发展有限公司,广东广州510635

出　　处：《建筑材料学报》2017年第3期475-480,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51508062);交通土建工程材料国家地方联合工程实验室开放基金项目(LHSYS-2014-001)

摘　　要：通过对矿粉、特立尼达湖沥青(TLA)中灰分比表面积、沥青胶浆比黏附功及其高温车辙因子进行测试,研究了TLA改性沥青中灰分、地沥青对TLA改性沥青高温车辙因子的影响,进而提出了TLA改性沥青高温车辙因子修正系数.结果表明:TLA对基质沥青的改性作用中,15.08%来自于其内部灰分与基质沥青的胶结作用,84.92%来自于TLA自身对基质沥青的改性作用.此外,将TLA中的灰分和地沥青对基质沥青的改性效果进行了量化分析,得出在各温度条件下,灰分掺量或地沥青掺量对沥青胶浆车辙因子的影响情况.最后得出TLA改性沥青高温车辙因子应除以系数0.925 3以扣除灰分作为填料的影响.The ash specific surface area, specific adhesion work of asphalt mortar and the rutting factor at high temperature in mineral powders and Trinidad Lake asphalt（TLA） were tested. Thus the impact of the ash content and earth asphalt in TLA modified asphalt on the rutting factor at high temperature of TLA modified asphalt was studied and the correction coefficient for the high temperature rutting factor of TLA modified as- phalt was obtained. Furthermore, it is found that the base asphalt is modified 15.08% by the adhesion be- tween the ash in TLA and the base asphalt and 84.92 % by TLA itself. From the quantitative analysis of the modification of the base asphalt by ash content and earth asphalt in TLA, impact of ash content and earth as- phalt of different amounts at different temperature on the rutting factor of asphalt mortar was clarified. Final- ly, it is concluded that, in order to eliminate the impact of the ash content as the asphalt filler, the high tem- perature rutting factor of TLA modified asphalt should be divided by a coefficient of 0. 925 3.

关 键 词：道路工程 沥青路面 特立尼达湖沥青(TLA)改性沥青 灰分 地沥青 比黏附功 车辙因子 

分 类 号：U414.7[交通运输工程—道路与铁道工程]