摘要
为了制备高黏度改性沥青,以70号A级石油沥青、TLA、SBS、芳烃油和稳定剂为原材料制备了TS (TLA+SBS)复合改性沥青,采用正交试验设计方法对TS复合改性沥青进行正交试验设计,研究了TLA掺量、SBS掺量和芳烃油掺量对TS复合改性沥青黏度、针入度、延度、软化点、黏韧性和韧性的影响规律,确定了TS高黏度改性沥青的最佳掺配比例。对TS高黏度改性沥青、6%SBS改性沥青和国产高黏度改性沥青进行了技术性能对比研究,并评价了3种高黏度改性沥青OGFC-13混合料的路用性能。结果表明:当TLA掺量为25%,SBS掺量为5%,芳烃油掺量为4%时,TS高黏度改性沥青的综合性能最佳;与6%SBS改性沥青和国产高黏度改性沥青相比,TS高黏度改性沥青具有更好的抗老化性、施工和易性和热储存稳定性; TS高黏度改性沥青的高温抗车辙性能远高于6%SBS改性沥青,但略低于国产高黏度改性沥青;与6%SBS改性沥青OGFC-13混合料和国产高黏度改性沥青OGFC-13混合料相比,TS高黏度改性沥青OGFC-13混合料具有优良的高温稳定性、水稳定性和排水性,但在低温抗裂性方面略微不足,可应用于我国南方湿热地区的沥青路面工程中。
In order to prepare high viscosity modified asphalt,TS( TLA + SBS) composite modified asphalt is prepared from A-70 road asphalt,TLA,SBS,aromatic oil and stabilizer,and orthogonal experimental design method is used in orthogonal experimental design of TS composite modified asphalt,the influences of contents of TLA,SBS and aromatic oil on viscosity,penetration,ductility,softening point,tenacity and toughness of TS composite modified asphalt are studied,and the optimum blend ratio of TS high viscosity modified asphalt is determined. The technical performance of TS high viscosity modified asphalt,6% SBS modified asphalt and domestic high viscosity modified asphalt is compared,and the pavement performance of 3 kinds of high viscosity modified asphalt OGFC-13 mixture are evaluated. The result shows that( 1) when TLA content is 25%,SBS content is 5% and aromatic oil content is 4%,the comprehensive property of TShigh viscosity modified asphalt is optimal;( 2) compared with 6% SBS modified asphalt and domestic high viscosity modified asphalt,TS high viscosity modified asphalt has better anti-aging property,workability and heat storage stability;( 3) the rutting resistance of TS high viscosity modified asphalt is much higher than that of 6% SBS modified asphalt,but slightly lower than that of domestic high viscosity modified asphalt;( 4)compared with 6% SBS modified asphalt OGFC-13 mixture and domestic high viscosity modified asphalt OGFC-13 mixture,TS high viscosity modified asphalt OGFC-13 mixture has excellent high temperature stability,water stability and drainage performance, but slightly insufficient in low temperature crack resistance,so it can be applied to asphalt pavement engineering in hot and humid areas in southern China.
作者
冯新军
解明卫
陈安迪
FENG Xin-jun;XIE Ming-wei;CHEN An-di(Key Laboratory of Road Structure and Material of Ministry of Transport,Changsha University of Science & Technology, Changsha Hunan 410114,China;School of Traffic and Transportation Engineering,Changsha University of Science & Technology,Changsha Hunan 410114,China)
出处
《公路交通科技》
CAS
CSCD
北大核心
2019年第1期8-15,共8页
Journal of Highway and Transportation Research and Development
基金
长沙理工大学道路结构与材料交通行业重点实验室开放基金资助项目(kfj160301)
关键词
道路工程
高黏度改性沥青
正交试验
TLA
SBS
路用性能
OGFC
road engineering
high viscosity modified asphalt
orthogonal experiment
TLA
SBS
pavement performance
open graded friction course (OGFC)
