导　　师： 郝培文

学科专业： H0502

授予学位： 硕士

作　　者： ;

机构地区： 长安大学

摘　　要： 随着中国公路交通的迅速发展,对高等级公路沥青路面材料的要求也越来越高,sbs聚合物改性沥青以其优良的技术性能得到了较为广泛的应用.但由于采用的改性方法各异,选用的改性剂又不同,sbs改性沥青产品的性能差别较大.该文在参考国内外研究的基础上,采用理论、试验相结合的方法,研究加工工艺参数以及改性剂种类等对sbs改性沥青性能的影响,并通过荧光显微镜、扫描电镜分析其微观形态,从而指导sbs改性沥青的生产;在此基础上,分析中国现行规范用来评价sbs改性沥青储存稳定性方面的不足,开发了新的试验仪,根据动态剪切流变试验结果和微观状态分析,提出一个新的指标——离析率r<,s>来评价sbs改性沥青的储存稳定性;最后,针对不稳定的改性沥青提出改善措施,研究证明掺加增容剂和稳定剂是行之有效的方法. With the rapid development of highway transportation in our country day by day , the material requirements to the super-highway bitumen pavement has become more and more strict , SBS polymer modified asphalt has been applied widely for its excellent pavement performance in the highway construction. But the properties of varied SBS modified asphalts diverge greatly because of their difference on producing methods and on SBS modifier sorts. On the backgrounds of researches inside and outside country , and cooperating experiments with theories analyses , the influence of different processing technology parameters and different SBS modifier sorts on the SBS modified asphalts' properties has been studied . At the same time, their microstructure are observed through Fluorescence optical microscopy and scanning electronic microscopy , thus to direct modified asphalt production. On the above conclusion's basement , analysing some disadvantages of the storage stability test of SBS modified asphalt in the current specification , a new storage stability test apparatus is developed . With the help of microscopic means , the Dynamic Shear Rheometer/(DSR/) test has been conducted using the new apparatus . A new index-Rs/(ratio of separation/) has been brought forward to evaluate the SBS modified asphalt's storage stability in this paper . Finally, aiming the unstable SBS modified asphalt , some improvement measures have been presented , and to add some specific compatilizer and stabilizer has been demonstrated to be valid measures by the studies.

关 键 词： 改性剂 聚合物改性沥青 技术性能 加工工艺 动态剪切流变 微观形态 储存稳定性 试验仪 离析率 增容剂 稳定剂

分 类 号： [U414.75]

领　　域： [交通运输工程]