CAJ | 학술논문

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。
채용광열우합노화화열양노화적방법연구료자외광여열우합대 SBS 개성력청적영향。결과표명，광열우합노화화열양노화가속료 SBS 개성력청적노화속솔，병개변 SBS 재력청중적분산상형모，사기향일상화전변。동시，연장노화시간、제고노화온도화증대자외광복조강도균능사득 SBS 개성력청적노화정도증가。광화열구유명현우합효응，사득 SBS 개성력청적노화정도비단독적열양노화정도경위엄중。
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.