| 摘要: |
| 针对传统橡胶沥青混溶速度慢、黏度大、加工难度高和掺量低等问题，采用螺杆反应挤出法对橡胶粉进行深度降解（溶胶质量分数大于50%），使其能在低温下快速混溶于沥青改性.结合常规测试和动态流变学分析研究了橡胶粉来源、掺量对使用温度下沥青流变性能和加工流变性能的影响.结果表明：深度降解橡胶粉能较快分散于沥青中；橡胶粉来源、掺量可影响改性沥青的高低温流变性能及加工流变性能;在不显著增加改性沥青黏度的情况下，深度降解橡胶粉的掺量（质量分数）可达50%以上. |
| 关键词: 深度降解橡胶粉 解交联 改性沥青 高掺量 流变性能 |
| DOI：103969/j.issn1007 9629201605027 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51273110，51568064） |
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| Rheological Property of Highly Degraded Rubber Modified Asphalt |
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YE Fen1, YANG Siyuan2, WU Xiaoyu3, LI Shuo3, WANG Shifeng3
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1.College of Civil Engineering, Xinjiang University, Urumqi 830047, China;2.Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China;3.Research Institute of Polymer, Shanghai Jiao Tong University, Shanghai 200240, China
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| Abstract: |
| To solve the problems of slow swelling, high viscosity and high processing difficulty and high viscosity of traditional rubber asphalt, the crumb rubber was highly degraded(soluable content(by mass) >50%) by using twin screw extruder to break the cross link network in rubber and modify the asphalt. The effect of the types and content of additives on the processing properties and rheological properties of highly degraded rubber asphalt was investigated by conventional asphalt test and dynamic mechanical analysis. The results show that the highly degraded crumb rubber can be dissolved in asphalt efficiently meanwhile the processing and its rheological property are improved. The tire source and content influence the rheological properties of modified asphalt. The increased content of the additive strengthens the improving effect. The maximum content of reclaimed crumb rubber reaches 50% without great increase of the processing viscosity. |
| Key words: highly degraded crumb rubber devulcanization modified asphalt high content rheological property |
