短期老化作用下聚合物改性沥青重复蠕变恢复性能对比研究

Performance Contrast Research on Repeated Creep Recovery Property of Polymer-modified Asphalt after Short-term Aging

应用重复蠕变恢复试验对橡胶粉改性沥青和SBS改性沥青(CRMA)以及经过短期老化作用的橡胶粉改性沥青和SBS改性沥青的高温性能进行评价。结果表明:橡胶粉改性沥青相对SBS改性沥青具有较好的高温抗变形能力以及高温变形恢复能力;短期老化作用在高温时对SBS改性沥青的抗变形能力和变形恢复能力有较大影响;压强对改性沥青的蠕变劲度的粘性成分G_v影响较小,温度对改性沥青的蠕变劲度的粘性成分G_v指标影响较大。

A repeated creep recovery test is made to evaluate the high property of rubber powder modified asphalt, and SBS modified asphalt （CRMA） , and short-term aging rubber powder modified asphalt and SBS modified asphalt. The results show that compared with SBS modified asphalt, the rubber powder modified asphalt has a better high temperature deformation resistance and high temperature deformation recovery ability; after short-term aging, the high temperature has larger impact of the high temperature deformation resistance and high temperature deformation recovery ability of the SBS modified asphalt; the viscous element Gv of the creep stiffness of modified asphalt is less affected by intensity of pressure, but the temperature has large impact on the viscous element Gv of the creep stiffness of modified asphalt.