温拌橡胶沥青性能对比研究

Comparative Study on Performance of Warm Mix Rubber Asphalt

采用Sasobit和Aspha-min两种温拌剂制备温拌橡胶沥青,通过Bookfield旋转粘度试验,DSR和旋转薄膜烘箱老化试验以及延度试验对比了两种温拌橡胶沥青的性能。结果显示：Sasobit能明显降低橡胶沥青的高温粘度,而Aspha-min却增加了橡胶沥青高温黏度,且黏度随着两种温拌剂反应时间的延长而增大;Sasobit与Aspha-min都可以增大橡胶沥青G＊/sinδ,且Sasobit增加幅度大于Aspha-min;Sasobit有利于橡胶沥青抗老化作用,而Aspha-min却略微有负面影响;Sasobit明显降低橡胶沥青5℃延度,而Aspha-min降低不明显。.

Two kinds of warm mix rubber asphalt were prepared with Sasobit and Aspha - min , and the performances were compared by Bookfield rotary viscometer test, DSR, rotating film oven aging test and duc- tility test. The results showed that： Sasobit could reduce the high temperature viscosity of the rubber asphalt obviously , while Aspharain actually increased the viscosity. The viscosity increased with the reaction time of warm mix asphalt additives. Sasobit and Aspha - min could increase the G ＊/sin δof the rubber asphalt , the increase range of Sasobit was more than Aspha - min. Sasobit was good for the anti - aging effect of the rubber asphalt , but Aspha -rain had slightly negative influence. For the ductility , Sasobit could obviously decrease the 5℃ ductility of the rubber asphalt , Aspha - min reduced unobviously.