为保证煤基超硬质沥青（SHA）在沥青改性中的应用效果，利用X射线衍射、红外光谱、化学组分分析等方法检测了SHA的物相组成；利用沥青针入度、软化点、黏度和老化试验方法检测了SHA改性沥青的性能指标；并结合前期研究，将SHA与3种天然沥青进行对比，探讨SHA物相组成及其沥青质结构参数特点，分析了SHA作为沥青改性剂的优势与不足，总结SHA物质组成与改性沥青性能指标之间的关系。结果表明，SHA由与沥青、天然沥青相同的4组分组成，沥青质质量分数偏低（19.7%），胶质质量分数高（23.1%）。SHA分子结构上的不饱和度远高于石油沥青，极性大；其沥青质芳香化程度较高，是缩合度较高的芳香结构；沥青质的芳香层间距、饱和部分间距与石油沥青、天然沥青基本相同。SHA作为沥青改性剂时，与天然沥青改性沥青的性能变化规律较一致，均属于以调整沥青组分为途径的改性行为；随SHA改性剂的掺量提高，改性沥青的针入度降低、软化点提高、延度衰减，沥青的温度敏感性降低，但改性沥青的抗老化性能得到提高；其沥青改性效果与改性剂的4组分含量、不溶物含量紧密相关。

In order to ensure the application effect of coal based super hard bitumen (SHA) in asphalt modification, the phase composition of SHA was detected by means of X ray diffraction, infrared spectrum and chemical composition analysis. The performance indexes of SHA modified asphalt were tested by means of penetration test, softening point, viscosity and aging test method. Combined with the previous research, SHA was compared with 3 kinds of naturalasphalt, and the characteristics of SHA phase composition and asphaltene structure parameters were discussed. The advantages and disadvantages of SHA as asphalt modifier were analyzed, and the relationship between SHA material composition and performance index of modified asphalt was summarized. The results show that SHA has the same four components as asphalt and natural asphalt, and the asphaltene content is low (19.7%), and the content of gum is high (23.1%). The unsaturated degree of SHA molecular structure is much higher than that of petroleum pitch, and its polarity is large. Its asphaltene has high aromatization degree and is an aromatic structure with high condensation degree. The aromatic layer spacing and saturated part spacing of asphaltene are basically the same as those of petroleum asphalt and natural asphalt. When SHA is used as asphalt modifier, the performance of asphalt modified asphalt is more consistent with that of natural asphalt modified asphalt. With the increase of the amount of SHA modifier, the penetration rate of modified asphalt decreases, the softening point increases, the ductility decreases, the temperature sensitivity of asphalt decreases, but the aging resistance of modified asphalt is improved. The asphalt modification effect is closely related to the four component content and insoluble content of the modifier.

0 引言

1 试验

   1.1 材料和仪器

   1.2 样品的制备

   1.3 样品的测试

2 结果与讨论

   2.1 物相组成

   2.2 红外光谱特征

   2.3 沥青质结构参数

   2.4 沥青改性效果

   2.5 沥青改性效果与组成的关系

3 结果与建议