温拌剂和阻燃剂对SBS改性沥青流变性能的影响

对掺加EC130温拌剂和FRMAXTM阻燃剂的SBS改性沥青进行高低温流变性能和黏温性能测试,考察两种改性剂对SBS改性沥青性能的影响。结果表明:EC130温拌剂降温效果明显,可使施工温度降低25℃,但对SBS改性沥青低温流变性能有不利影响,低温PG分级由-18℃下降到-12℃;FRMAXTM阻燃剂可以提高SBS改性沥青的高温抗变形能力,高温PG分级由82℃上升到88℃,但对低温流变性能和黏温性能有一定影响,低温PG分级由-18℃下降到-12℃,沥青混合料施工温度上升5℃;两者共同加入SBS改性沥青时会提高其高温性能和黏温性能,高温PG分级由82℃上升到88℃,施工温度下降20℃,但会降低其低温性能,低温PG分级由-18℃下降到-12℃。

EFFECT OF WARM MIXTURE AGENT AND FLAME RETARDANT ON RHEOLOGICAL PROPERTIES OF SBS MODIFIED ASPHALT

The SBS modified asphalt blended with the EC130 warm mixture agent and the FRMAXTM flame retardant was tested by the dynamic shear rheometer (DSR), the curved beam rheometer (BBR) and the Brookfield to investigate the effects of two modifiers on the rheological properties of SBS modified asphalt. The results showed that the cooling effect of the EC130 warm mixture agent is obvious, which can effectively reduce the construction temperature of 25℃, however, it has an adverse effect on the low temperature rheological properties of the SBS modified asphalt, the low temperature PG classification drops to -12℃from -18℃; the FRMAXTM flame retardant can improve the high temperature deformation resistance of the SBS modified asphalt, the high temperature PG grade rises to 88℃ from 82℃, but has certain adverse influence on the low temperature rheological properties and the viscosity temperature performance, the low temperature PG grade drops to -12℃ from -18℃, the asphalt mixture construction temperature rises by 5℃. When the two added to the SBS modified asphalt together, the high temperature performance and the viscosity temperature performance are improved. The high temperature PG grade rises to 88℃ from 82℃, the construction temperature drops by 20℃, and the low temperature PG grade drops to -12℃ from -18℃.