道路沥青及SBS改性沥青的紫外老化研究

采用紫外辐射试验对道路沥青和SBS改性沥青进行加速老化试验研究.利用老化前后的软化点、针八度、延度和四组分变化。分析了道路沥青的紫外线老化机理。结果表明:随紫外线老化时间的延长,道路沥青和SBS改性沥青软化点呈上升趋势、针入度和延度呈降低变化趋势,其中又以延度变化最为明显。经紫外线老化后道路沥青和SBS改性沥青的四组分也有变化,其中沥青质略微上升、芳香分略微降低,而饱和分和胶质变化不大。

Study on ultraviolet radiation aging of road asphalt and SBS modified asphalt

Research on road asphalt and SBS modified asphalt acceleratingaging experiment by use of ultraviolet radiation test box,analysised the road asphalt' s ultraviolet aging mechanism based on the differences of the softening point,penetration,ductility,and four components around aging,the results show that:with the extension of ultraviolet aging time,the road asphalt and SBS modified as- phalt's softening point escalating,yet its penetration and ductility decreasing,especially for changing of ductility.After ultraviolet radiation aging,the road asphalt and SBS modified asphalt's four compo- nents also changed,of which the asphaltene content slightly rised,the aromatics content slightly dropped,but the saturates content and the resin content changed not much.