高等级道路沥青延展性及调合组分的选择

RESEARCH ON DUCTILITY OF PAVING ASPHALT AND ITS SELECTION FOR BLENDING COMPONENT

通过对高等级道路沥青的基础沥青（溶剂脱油的软沥青及硬沥青）和调合组分（抽出油、中东减渣１及中东减渣２、油浆）进行物理性质、化学组成及ＧＰＣ分子量测定，质谱族组成分析，阐述了影响沥青薄膜烘箱（ＴＦＯＴ）后１５℃延度大小的因素。经过调合后的沥青物性指标表明，作为高等级道路沥青的调合组分，中东减渣１比中东减渣２具有更优越的调合性能；抽出油作为沥青调合组分，调合出的沥青ＴＦＯＴ后延度＞１５０ｃｍ；催化油浆经过改质也可以作为与抽出油相当的理想调合组分，但长期的沥青老化性能与路用性能是否理想仍有待于进一步研究。

The physico-chemical properties of the base asphalt of high grade paving asphlt(smaller penetration asphalt and higher penetration asphalt)and the blending components(extracted oil,Middle East vacuum residue,modified FCC slurry oil) were studied by MS composition analysis,GPC molecular weight distribution determination The specification and results of paving asphalt blending indicated that the 15℃ ductility after thin film oven test(TFOT)of paving asphalt were conrtolled by the propetries of blending componentsThe Middle East VR1 is better thanVR2 as the blending component for 15℃ ductility atfer TFOT,the 15℃ ductility usually exceeded 150cm for extraction oil as blending component added in the base asphaltModified FCC slurry oil can be a better blending component when blended with smaller penetration asphalt,the 15℃ ductility after TFOT higher than 100cm, but the paving properties of FCC slurry as the blending component should be deeply studied