| 引用本文: | 周纯秀,王璐,张中丽,臧志远,吴腾飞.超硬质沥青改性结合料流变性能分析[J].哈尔滨工业大学学报,2020,52(9):144.DOI:10.11918/201905082 |
| ZHOU Chunxiu,WANG Lu,ZHANG Zhongli,ZANG Zhiyuan,WU Tengfei.Analysis of rheological properties of super hard asphalt modified binders[J].Journal of Harbin Institute of Technology,2020,52(9):144.DOI:10.11918/201905082 |
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| 摘要: |
| 为研究超硬质沥青(super hard asphalt,SHA)对超硬质沥青结合料的高、低温流变的影响效果,采用SHA作为改性剂对AH-90道路石油沥青进行改性,制备了不同质量分数（5%、6%、7%和8%）的SHA改性结合料,并进行动态剪切流变试验、多应力蠕变恢复试验及小梁弯曲蠕变试验. 试验结果表明:其适用于时温等效原理；SHA的掺入会有效提高沥青结合料的车辙因子G*/sin δ,沥青混合料的高温性能得到明显改善；随着SHA掺量的增加,沥青结合料的平均应变恢复率R逐渐升高,不可恢复蠕变柔量Jnr逐渐降低,掺加SHA有利于提高沥青结合料高温抗变形能力与变形恢复能力；随着SHA的掺入,沥青结合料的蠕变劲度S与蠕变劲度变化率m变化幅度不大,对沥青结合料的低温抗裂性能影响不大. SHA改性沥青结合料高温抗车辙性能优异,低温性能相对于基质沥青PG分级保持不变. |
| 关键词: 超硬质沥青 流变性能 Black曲线 动态剪切流变试验 弯曲蠕变 |
| DOI：10.11918/201905082 |
| 分类号:U414 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51308084)； 中央高校基本科研业务费专项资金(3132014326) |
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| Analysis of rheological properties of super hard asphalt modified binders |
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ZHOU Chunxiu1,WANG Lu1,ZHANG Zhongli1,ZANG Zhiyuan1,WU Tengfei2
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(1. College of Transportation Engineering, Dalian Maritime University, Dalian 116026, Liaoning, China; 2. Songyuan Sub-bureau, Jilin Provincial Expressway Administration, Songyuan 138001, Jilin, China)
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| Abstract: |
| To study the effect of super hard asphalt (SHA) on high and low temperature rheological properties of SHA modified binders, SHA was adopted as modifier to modify AH-90 pavement petroleum asphalt. Different proportions (5%, 6%, 7%, and 8%) of SHA binders were prepared, and dynamic shear rheology test, multiple stress creep-recovery test, and bending beam rheometer test were carried out. Results show that SHA modified binder conformed to time-temperature equivalence principle. The addition of SHA significantly improved the rutting factor of asphalt binder, indicating that the high temperature performance of asphalt binder was obviously improved. With the increase of SHA content, the average strain recovery rate of asphalt binder increased gradually, and the unrecoverable creep compliance decreased gradually, which means SHA is conducive to improving the high-temperature deformation resistance ability and elastic resilience ability of asphalt binder. With the incorporation of SHA, the variations of creep stiffness and creep stiffness change rate of asphalt binder were small, and the low-temperature anti-cracking performance of asphalt binder was little affected. Modified asphalt binder with SHA had excellent rutting resistance at high temperature, and its low-temperature performance remained unchanged with respect to PG classification of matrix asphalt. |
| Key words: super hard asphalt rheological properties Black curve dynamic shear rheology test bending beam rheometer |
