| 摘要: |
| 通过螺杆高温挤出使胶粉预先脱硫降解，然后嵌入分散在苯乙烯丁二烯苯乙烯嵌段共聚物（SBS）改性沥青中，研究了胶粉的降解程度、种类、含量及交联稳定工艺对复合改性沥青结构与性能的影响.结果表明：降解胶粉易微细化嵌入SBS改性沥青中，明显提高了SBS改性沥青的低温延度和耐老化性能，且不明显增加复合改性沥青的施工黏度.嵌入式胶粉复合SBS改性沥青经过交联稳定后热贮存稳定性能良好. |
| 关键词: SBS改性沥青 微细化 胶粉 性能 结构 |
| DOI：103969/j.issn1007 9629201603020 |
| 分类号: |
| 基金项目:国际合作项目(2013DFR50550) |
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| Structure and Property of Asphalt Modified by SBS Embedded with Crumb Rubber |
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WANG Shifeng1, WU Xiaoyu1, YANG Siyuan2, YAO Hongru3
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1.Research Institute of Polymer Materials, Shanghai Jiao Tong University, Shanghai 200240, China;2.College of Transportation Engineering, Tongji University, Shanghai 201804, China;3.Shanghai Road and BridgeGroup Co., Ltd., Shanghai 200433, China
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| Abstract: |
| SBS embedded with micro dispersed crumb rubber modified asphalt was prepared by degraded crumb rubber by twin screw extrusion at high temperature. The effect of degradation degree, type of rubber source, content and crosslinking process on the structure and properties of SBS modified asphalt was investigated. The results show that the degraded rubber is easily dispersed into SBS modified asphalt in micro size. The incorporation of degraded rubber increases the ductility at low temperature and enhences the aging resistance. In the same time, the handling viscosity of SBS modified asphalt is not notably increased by the addition of degraded rubber. The hot storage stability of asphalt modified by SBS embedded with rubber can be realized by crosslinking technology. |
| Key words: SBS modified asphalt micro dispersion crumb rubber property structure |
