透水沥青路面复合改性沥青性能研究

Study on Properties of Composite Modified Asphalt for Permeable Asphalt Pavement

以透水沥青路面所用的改性沥青为研究对象,按照设计方案制备PAl、PA2两类改性沥青,并分别从针入度、软化度及延性等指标入手展开分析,将其与SBS改性沥青、橡胶沥青的实测指标进行比对。研究表明:(1) PAl、PA2改性沥青具有较高的软化点及低温延性,同时在高温稳定、低温抗裂方面也有较好表现;(2)沥青、改性剂之间的相容性较好,能够形成稳定的整体;(3) PAl、PA2改性沥青与石料之间的粘附性较好,可以很好地抵抗冲击荷载。

The modified asphalt used for permeable asphalt pavement as the research object, according to the design scheme to prepare PAl, PA2 modified asphalt, and from the needle penetration, softening and ductility of the indicators were analyzed, and compared with SBS modified asphalt, rubber asphalt measured indicators. The results show that :(1) PAl and PA2 modified asphalt have high softening point and low temperature ductility, and have good performance in high temperature stability and low temperature crack resistance.(2) the compatibility between asphalt and modifier is good, which can form a stable whole;(3) The adhesion between PAl and PA2 modified asphalt and stone is good, which can resist impact load well.