SBS与橡胶粉复合改性沥青性能研究

Research on the performance of SBS and rubber powder combined modified asphalt

以90号沥青作为基质沥青,分别以SBS、橡胶粉及其二者复合为改性剂对沥青进行改性,研究了剪切温度、剪切时间、掺量对改性沥青的针入度、软化点和延度的影响规律,确定合适的剪切温度、剪切时间和掺量。研究了SBS与橡胶粉不同掺加顺序、不同掺量组合对SBS与橡胶粉复合改性沥青的针入度、软化点和延度的影响规律,确定复合改性沥青中SBS与橡胶粉掺加顺序和适当掺量,并比较各种改性沥青的针入度、软化点和延度。

Base on the 90# asphalt,with the addition of SBS,rubber, aud SBS and rubber mixture respectively,the variation rule of different shearing temperature,time and mixing amount on the penetration degree,soft point and ductility of modified asphalt has been studied and the proper shear temperature, time and mixing amount are confirmed. The variation rule of penetration degree,soft point and ductility of modified asphalt on the condition of different SBS and rubber adding order and mixing amount is also studied and the proper adding order and mixing amount of SBS and rubber powder in composite modified asphalt are determined. The penetration degree,soft point and ductility of various kinds of modified asphalt are compared.