Abstract: The paper studied SBS polymer modified asphalt.It an alysed effect of blend time and temperature on SBS polymer modified asphalt prop erties,and the results show the effective blend time for Japanese asphalt,SLi as p halt and LAL asphalt modified with SBS polymer are espectively 3 hours,3 hours a nd 4 hours,based on temperature susceptibility?high temperature stability and l ow temperature stability of asphalt.With the increase of the blend temperature, the temperature susceptibility of SBS polymer modified asphalt is decreased,the soft point and ductility at low temperature are increased,and it shows that incr easing of blend temperature is beneficial to compatibility between SBS polymer a nd asphalt.

Key words: blend time, blend temperature, modified asphalt, performance

摘要： 通过对SBS改性沥青的研究,分析了搅拌时间和温度变化对改性沥青性能的影响,结果表明 :在综合考虑感温性、高温稳定性及低温抗裂性等指标时,搅拌温度在 180℃条件下,日本沥青、胜利沥青及兰炼沥青用SBS进行改性时其合理的搅拌时间分别为 2h,3h和 4h;随着搅拌温度的升高,改性沥青的感温性降低、软化点、低温延度增加;说明适当增加搅拌温度有利于聚合物与沥青的相容

关键词: 搅拌时间, 搅拌温度, 改性沥青, 力学性能