南京理工大学学报（自然科学版）2019，Vol.43Issue(5)：660-666,7.DOI:10.14177/j.cnki.32-1397n.2019.43.05.017
星型SBS改性沥青热氧和紫外光老化特性研究
Thermo-oxidative and ultraviolet radiation aging effect on property of star-shaped SBS modified asphalt
摘要
Abstract
In order to evaluate effects of thermo-oxidative aging and ultraviolet radiation( UV) aging on the primary technical properties of star-shaped styrene-butadiene-styrene( SBS) modified asphalt, the penetration,ductility,softening point and apparent viscosity of binders after various aging times are studied by laboratory simulation tests. The aging kinetic models of star-shaped SBS modified asphalt are established in accordance with the apparent viscosity values. The results show that the aging affects of star-shaped SBS modified asphalt caused by UV aging are as well as those binders subjected to the thermo-oxidative aging. The penetration values and ductility values tend to decrease as aging times increase. The apparent viscosity values of 135℃ grow continually with extended aging time,while non-monotonic development trends of softening point values are observed for the binders with increasing aging times. There are differences in aging reaction rates between the SBS modified asphalt binders prepared by different matrix asphalts in the process of thermo-oxidative aging. However,the rates are almost the same for the two SBS modified asphalt binders in the UV aging process. The thermo-oxidative aging and the UV aging of the SBS modified asphalt can be character-ized by the first-order oxidation reaction equation,and the established aging models can estimate the apparent viscosity values of star-shaped SBS modified asphalt binders subjected to the coupled effects of the thermo-oxidative aging and the UV aging.关键词
苯乙烯-丁二烯-苯乙烯嵌段共聚物改性沥青/热氧老化/紫外光老化/表观黏度/动力学模型Key words
styrene-butadiene-styrene modified asphalt/thermo-oxidative aging/ultraviolet radiation aging/apparent viscosity/kinetic models分类
交通工程引用本文复制引用
徐鸥明,曹志飞,李明月,程贤鹏,韩森..星型SBS改性沥青热氧和紫外光老化特性研究[J].南京理工大学学报（自然科学版）,2019,43(5):660-666,7.基金项目
中国博士后科学基金(2016M600757) （2016M600757）
国家自然科学基金(51578076) （51578076）
陕西省交建集团科研项目(18-12) （18-12）
