SBS改性沥青光老化性能试验研究  

SBS Modified Asphalt Performance Test of Sunlight-aging

作　　者：何燕 周维[2] 

机构地区：[1]重庆市渝通公路工程总公司,重庆400074 [2]重庆交通大学土木建筑学院,重庆400074

出　　处：《现代交通技术》2010年第5期1-3,共3页Modern Transportation Technology

摘　　要：沥青在高温、光氧作用下会发生一系列物理及化学变化,通过常规试验、动态剪切试验、BBR试验并结合FTIR试验来研究老化后的性能,结果表明,SBS改性沥青老化后出现了羧基和亚砜基;其软化点增加,针入度减小,低温延度降低,缩短了路面使用寿命。The asphalt took place the volatility,oxidation,decomposition,aggregation and other physical chemical changes in high temperature and the oxygen effecttion.Using convention instrumentation,dynamic shear rheometer,bending beam rheometer,FTIR and other detection methods,this papers study the aging performance.After the aging,SBS modified asphalt appeare carbonyl and sub-sulfone functional groups.Softening point is increased and penetration and low-temperature ductility is decreased,which Shorten the service life of pavement.

关 键 词：SBS改性沥青 常规试验 红外光谱 光老化 老化机理 

分 类 号：U414[交通运输工程—道路与铁道工程]