| 李宁利,王思宇,栗培龙.生物质油温拌石油沥青效果评价及机理分析[J].,2021,61(6):634-644 |
| 生物质油温拌石油沥青效果评价及机理分析 |
| Effect evaluation of warm mixing of biomass oil and petroleum asphalt and analysis of warm mixing mechanism |
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| DOI：10.7511/dllgxb202106011 |
| 中文关键词: 生物质油 石油沥青 温拌效果 最佳掺量 流变性能 作用机理 |
| 英文关键词: biomass oil petroleum asphalt warm mixing effect optimal content rheological properties mechanism of action |
| 基金项目:天津市企业科技特派员项目(18JCTPJC55800)；长安大学重点科研平台开放基金资助项目(300102210510). |
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| 中文摘要: |
| 以节约能源、保护环境、改进温拌技术水平为目的，采用价格低廉、绿色环保的生物质油为温拌剂，对70#京博、70#伦特、90#伦特石油沥青进行温拌，通过旋转黏度实验及针入度、软化点、10 ℃延度等指标确定温拌效果最佳的生物质油及其最佳掺量范围；通过动态剪切流变实验和弯曲梁流变实验，评价最佳生物质油温拌石油沥青的高、低温流变性能；通过红外光谱实验，研究3种生物质油对石油沥青的作用机理；通过四组分分析方法，研究生物质油A、B、C降黏效果差异的原因．黏度实验结果表明，3种生物质油中，4%掺量的生物质油A能够使70#京博、70#伦特、90#伦特石油沥青的135 ℃黏度降低30%以上，降黏效果最佳，生物质油B、C降黏幅度达不到温拌剂要求的30%，效果较差；三大指标实验结果表明，生物质油A对3种石油沥青最佳掺量范围为2%~5%；流变性能实验结果表明，生物质油A提高了3种石油沥青的低温抗裂性能，降低了高温抗车辙性能；红外光谱结果表明，掺加生物质油A、B、C后的70#京博、70#伦特、90#伦特石油沥青，光谱图均未出现新的特征峰，因此3种生物质油与石油沥青混合过程为物理变化；四组分分析结果表明，生物质油A具有较高含量的饱和分，削弱了沥青胶团体系的引力场，增加了沥青胶团的分散度，从而导致沥青黏度降低，而生物质油B、C饱和分含量较低，分散胶团的能力差，降黏效果较差． |
| 英文摘要: |
| To save energy, protect environment and improve the level of warm mixing technology, the low cost, green and environmentally friendly biomass oil is used as the warm mixing agent to warm 70# Jingbo, 70# Lunte, 90# Lunte petroleum asphalt. The biomass oil with the best warm mixing effect and optimal blending range is determined through rotational viscosity experiment, and indicators as penetration, softening point, ductility at 10 ℃, etc.. Through dynamic shear rheological experiment and bending beam rheological experiment, the high and low temperature rheological properties of the best biomass oil warm mixed petroleum asphalt are evaluated. Through infrared spectroscopy experiments, the mechanism of action of three biomass oils on petroleum asphalt is studied. Through four component analysis method, the reason for the difference in viscosity reduction effect of biomass oil A, B and C is researched. The results of the viscosity experiment show that among the three kinds of biomass oils, 4% of biomass oil A can reduce the 135 ℃ viscosity of 70# Jingbo, 70# Lunte and 90# Lunte petroleum asphalt by more than 30%, the viscosity reduction effect is the best, but the viscosity reduction range of biomass oils B and C does not reach 30% of the requirement of the warm mixing agent, the effect is poor. The experimental results of the three indicators show that the best content range of biomass oil A for the three petroleum asphalts is 2% 5%. The rheological performance test results show that biomass oil A improves the low temperature crack resistance of the three petroleum asphalts and reduces the high temperature rutting resistance. Infrared spectroscopy results show that there are no new characteristic peaks in the spectrum of 70# Jingbo, 70# Lunte and 90# Lunte petroleum asphalt mixed with biomass oils A, B and C. Therefore, the three kinds of biomass oils and petroleum asphalt mixing process is a physical change. The four component analysis results show that biomass oil A has a higher content of saturation, which weakens the gravitational field of the asphalt micelle system, increases the dispersion of the asphalt micelles, and reduces the viscosity of the asphalt. However, the contents of biomass oils B and C saturated components are low, the ability to disperse micelles is poor, and the viscosity reduction effect is poor. |
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