多聚磷酸与SBS复合改性沥青性能研究

Investigation on the Performance of Asphalt Binder Containing PPA and SBS Modifiers

采用多聚磷酸(PPA)和SBS改性剂对基质沥青进行复合改性,通过流变性能试验、老化试验和存储性试验对PPA&SBS复合改性沥青的性能进行研究,结果表明,添加PPA和SBS改性剂能改善沥青的高温性能,在PPA&SBS复合改性沥青的抗老化性能和存储稳定性试验中,SBS掺量越多,沥青抗老化性能越好,存储稳定性越差,PPA改性剂能够提高沥青的抗老化性能,对存储稳定性影响不大。

Polyphosphoric acid(PPA)and styreneic block copolymers(SBS)were used as modifiers for base bitumen.The rheological performance,ageing performance and storage performance of such modified asphalt were investigated.Test results indicated that the high temperature performance and ageing resistance of asphalt binders can be improved by the PPA and SBS modifiers.Storage performance of asphalt binders is decrease with the increasing dosage of SBS modifier,but the influence of PPA modifier is less.