煤直接液化残渣改性沥青胶浆性能研究

Research on performance of direct coal liquefaction residue modified asphalt mortar

  • 摘要: 为了研究煤直接液化残渣(Direct Coal Liquefaction Residue,DCLR)改性沥青胶浆的性能,制备不同DCLR掺量和粉胶比(Filler-Asphalt ratio, FA)的DCLR改性沥青胶浆。采用动态剪切流变仪与弯曲梁流变仪对胶浆的性能进行测试,并利用方差分析法分析了单一因素(DCLR掺量、温度、FA)及因素间耦合作用对胶浆性能的影响。结果表明,DCLR和矿粉的加入均能显著提高胶浆的高温性能,但对其低温及疲劳性能会造成较大的损伤。平衡DCLR掺量和FA对胶浆性能的综合影响,得出最佳DCLR掺量为10%,最佳FA为1.0。除此之外,单一因素(DCLR掺量、温度、FA)及因素间耦合作用对胶浆的性能均有着显著的影响,相对来说,因素间耦合作用对胶浆性能的影响明显小于单一因素对胶浆性能造成的影响。

     

    Abstract: In order to study the performance of DCLR (direct coal liquefaction residue) modified asphalt mortar, different DCLR modified asphalt mortar with different DCLR contents and filler-asphalt ratios (FA) was prepared. The high-and-low temperature and fatigue performance of asphalt mortar was analyzed by a dynamic shear rheometer and a bending beam rheometer. Using the variance analysis method the influence of the single factor (temperature, DCLR content, FA) and the coupling between these factors on the performance of asphalt mortar was investigated. The results show that the addition of DCLR and filler can significantly improve the high-temperature performance of asphalt mortar, but damage the low-temperature performance and the fatigue performance of asphalt mortar. To comprehensively balance the effects of DCLR content and FA on the performance of the mortar, the DCLR content of 10% and the FA of 1.0 are recommended. Besides, the single factor (temperature, DCLR content, FA) and the coupling between these factors have significant effects on the performance of asphalt mortar, but the effect of the coupling is smaller than that of the single factor.

     

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