| 摘要: |
| 通过室内模拟低空气浓度（或相对绝氧）环境下苯乙烯丁二烯苯乙烯嵌段共聚物（SBS）改性沥青的热降解过程，测试和分析了不同条件下SBS改性沥青的性能．结果表明：在热降解过程中，SBS改性沥青低温抗裂能力随时间的延长或温度的升高而逐渐降低；与低空气浓度下热降解对SBS改性沥青微观结构的影响相比，SBS改性沥青在高空气浓度下热降解过程中有更高的羰基和更低丁二烯含量．在生产、储存和运输SBS改性沥青时，需要充分考虑时间、温度以及空气浓度对其性能的影响. |
| 关键词: SBS改性沥青 热降解 储存性能 化学结构 |
| DOI：103969/j.issn1007 9629202002028 |
| 分类号: |
| 基金项目:陕西省重点研发项目（2017GY 161）;中央高校基本科研业务费专项资金资助项目（30010218201） |
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| Effects of Degradation of SBS Modified Asphalt Binders during Thermal Storage and Transportation |
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ZHOU Zhenjun, WANG Junyan, CONG Peiliang
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Engineering Research Center of Transportation Materials of Ministry of Education, Changan University, Xian 710064, China
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| Abstract: |
| Through indoor simulation of the thermal degradation process of styrene butadiene styrene block copolymer(SBS) modified asphalt binders under low air concentration(or relative condition without oxygen), the performance of SBS modified asphalt binders under different conditions was tested and analyzed. The results show that in the process of thermal degradation, the crack resistance of SBS modified asphalt binders at low temperature decreased with time or temperature increases; compared with the effects of thermal degradation under low air concentration on microstructure of SBS modified asphalt binders, SBS modified asphalt binders have higher carbonyl and lower butadiene contents during thermal degradation under high air concentration. It is necessary to fully consider the influences of time, temperature and air concentration on SBS modified asphalt binders performance in the production, storage and transportation of SBS modified asphalt binders. |
| Key words: SBS modified asphalt thermal degradation storage performance chemical structure |
