蒙脱土改性沥青的制备与性能研究  

Preparation and Properties of Montmorillonite Modified Asphalt

作　　者：付玉[1] 余剑英[1] 冯鹏程[1] 周立平[2] 郭连杰[2] 

机构地区：[1]武汉理工大学材料科学与工程学院 [2]内蒙古通辽市交通工程局,通辽028000

出　　处：《武汉理工大学学报》2007年第9期51-54,共4页Journal of Wuhan University of Technology

基　　金：交通部西部交通建设科技项目(200631800076)

摘　　要：采用熔融插层法制备了蒙脱土改性沥青,利用XRD分析了蒙脱土在沥青中的分散结构,研究了不同蒙脱土(钠基蒙脱土、有机化蒙脱土)对不同产地沥青物理性能的影响。结果表明:钠基蒙脱土(Na-MMT)可与沥青形成插层型纳米复合结构,而有机化蒙脱土(OMMT)与沥青形成了剥离型纳米复合结构。Na-MMT和OMMT均可增大沥青的软化点和粘度,明显提高沥青的耐高温性能,但OMMT改善效果更为显著。蒙脱土对不同沥青(盘锦-90#沥青、SK-70#、TZ-70#)的改性效果有明显差异,对盘锦-90#沥青的改性效果最好。蒙脱土掺量在2%—3%之间时,沥青的性能变化最大。Montmorillonite （MMT） modified asphalts were prepared by melt intercalation. The dispersing states of MMT in the asphalt were characterized by X-ray diffraction （XRD）. The effect of montmorillonite type （Na-MMT,OMMT） on physi- cal properties of the asphalt from different area was researched. The result showed that Na-MMT modified asphalt form an in- tercalated structure, whereas the OMMT modified asphalt form an exfoliated structure. Both Na-MMT and OMMT can be able to increase the softening point and viscosity of asphalts, but OMMT had a better modification effect. Moreover, montmorillonite had an evident difference for asphalt from different area in modification effect. Especially for the PJ-90 asphalt, it＇s modification effect was the best. At the same time, it was proved that the properties of asphalt showed a largest change when the content of MMT is between 2 % and 3 %.

关 键 词：沥青 蒙脱土 改性 纳米复合材料 

分 类 号：U414.75[交通运输工程—道路与铁道工程]