交联SBR改性沥青的研究

研究了SBR用量和交联对SBR改性沥青的性能与结构的影响。结果表明，随着SBR用量的增大，改性沥青高温时的粘度、软化点和弹性恢复率均增大；SBR经交联后，SBR改性沥青的软化点、弹性恢复率和粘韧性均增大；SBR改性沥青低温时的延度接近SBS改性沥青的水平；交联后虽使改性沥青高温时的粘度增大，但不会对施工造成困难；化学交联并不影响SBR在沥青中的分散，不会使SBR在沥青中聚结。;The influence of the addition level and crosslink of SBR on the structure and properties of SBR-modified asphalt was investigated.The results showed that the viscosity，softening point and elastic recovery of modified asphalt at elevated temperature increased as the addition level of SBR increased；the softening point，elastic recovery and visco-toughness of SBR-modified asphalt at elevated temperature increased when SBR was crosslinked；the extendibility of SBR-modified asphalt at low temperature was similar to that of SBS-modified asphalt；although the crosslink of SBR made the viscosity of modified asphalt increase，it made no difficulty for construction；and the chemical crosslink didn't cause the aggregation of SBR in asphalt resulting in poor dispersion of SBR