摘要
采用光热耦合老化和热氧老化的方法研究了紫外光与热耦合对SBS改性沥青的影响。结果表明,光热耦合老化和热氧老化加速了SBS改性沥青的老化速率,并改变SBS在沥青中的分散相形貌,使其向一相化转变。同时,延长老化时间、提高老化温度和增大紫外光辐照强度均能使得SBS改性沥青的老化程度增加。光和热具有明显耦合效应,使得SBS改性沥青的老化程度比单独的热氧老化程度更为严重。
The effects of ultraviolet and thermal coupling on performance of SBS modified bitumen were investigated by methods of photo-thermal coupling aging and thermo-oxidative aging.The re-sults show that photo-thermal coupling aging and thermo-oxidative aging accelerate the aging rate of SBS modified bitumen and change the morphology of SBS dispersed in bitumen phase,leading to transforming to homogeneous one phase.Meanwhile,increasing in aging,temperature and ultraviolet irradiation intensity can aggravate the aging of SBS modified bitumen.Ultraviolet and heat exhibit sig-nificant coupling effect,resulting in more severe aging of SBS modified bitumen in comparison with single thermo-oxidative aging.
出处
《交通科技》
2014年第6期105-108,共4页
Transportation Science & Technology
基金
国家"863"高技术研究发展计划(2013AA031602)
国家科技部科技支撑计划项目(2011BAE28B03)
国家重大科学仪器设备开发专项(2013YQ160501)
国家"973"项目(2014CB932104)资助
关键词
改性沥青
热氧老化
光热耦合老化
SBS
SBS modified bitumen
photo-thermal coupling aging
thermo-oxidative agin g
