摘要
采用了3种基质沥青、3种SBS改性剂,制备了5种SBS改性沥青,通过BBR试验得到沥青的劲度模量S和劲度模量变化率m,计算得到其低温等级温度TLC,并与各沥青的延度值进行比较,结果表明用TLC评价SBS改性沥青的低温性能更加合理。并分析了基质沥青和SBS类型对TLC的影响规律,结果表明,基质沥青中胶质和芳香分含量越高SBS改性沥青低温性能越好,线型SBS改性沥青低温性能优于星型SBS改性沥青。
Five SIkS modified asphalts were prepared with three neat asphalts and three SBS modifiers. The creep stiffness S and the rate of change of creep stiffness m were obtained based on the BBR tests and the critical low temperatures were comput- ed. According to the comparison between and ductility, is more reasonably used as the evaluation index of low-temperature per- fomlance. And the neat asphalts and SBS types＇ influences on were discussed. The results show that the higher content of resin and aromatic, the better the low-temperature performance of SBS modified asphalt is; and the low-temperature performance of linear SBS modified asphalt is better than that of radial St3S modified asphalt.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第2期15-18,共4页
Journal of Wuhan University of Technology
基金
西部交通建设科研项目(200831881210)
