| 摘要: |
| 采用动态剪切流变仪（DSR）、弯曲梁流变仪(BBR)、红外光谱仪（IR）和扫描电子显微镜（SEM）等测试了原样沥青、RTFOT短期老化沥青、RTFOT+PAV（20h）长期老化沥青和YG 1再生沥青的流变参数及微观指标；利用灰关联分析法建立了流变参数与微观指标之间的关联度，结合Comsol数值分析结果，阐述了微波敏感型沥青再生剂的再生机理.结果表明：沥青储能模量、损耗模量、复数剪切模量与沥青组分以及官能团的关联度值均大于08，劲度模量变化率与胶质含量的关联度值为0743，关联度较好；微波敏感型沥青再生剂能够恢复老化沥青组分比例和官能团数量，使老化沥青再生，其乳液体系和微波发热材料加速了再生剂与老化沥青的融合. |
| 关键词: 道路工程 再生剂 沥青性能 再生机理 微波 |
| DOI：103969/j.issn.1007 9629202101022 |
| 分类号: |
| 基金项目:交通运输部企业技术创新项目（2014315490010）;内蒙古自治区交通运输厅建设科技项目（NJ 2020 13）；内蒙古自治区科技计划（2020GG0257） |
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| Regenerated Performance and Its Mechanism of Microwave Sensitive Asphalt Rejuvenate Agent |
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LI Yongxiang1, MI Shizhong2, LI Jun2
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1.College of Energy and Transportation Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China;2.Inner Mongolia Autonomous Region Road Materials Recycling and Maintenance Engineering Technology Research Center, Inner Mongolia Road and Bridge Group Co., Ltd., Hohehot 010010, China
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| Abstract: |
| The rheological parameters and microscopic indexes of the original, short term aging, long term aging and regenerated asphalts were tested by dynamic shear rheometer（DSR）, bending beam rheometer(BBR), infrared spectrometer(IR）and scanning electron microscope（SEM）. The relationship of rheological parameters and microscopic indexes was established by grey correlation analysis, combined with Comsol numerical analysis results, the regeneration mechanism of microwave sensitive asphalt rejuvenate agent was studied. The results show that the correlation degree between storage modulus, loss modulus, complex shear modulus and component and functional groups change of asphalt is greater than 08, and the correlation degree between m value and bitumen resin is 0743, the correlation degree is better. Microwave sensitive asphalt rejuvenate agent can restore the proportion of the aged asphalt component and the number of functional groups by component adjustment, and the microwave heating material and the emulsion system accelerate the fusion of the regeneration agent and the aged asphalt. |
| Key words: road engineering regeneration agent asphalt performance regeneration mechanism microwave |
