Abstract: According to the preparation method of melt intercalation composite, inorganic and organic bentonite pitch-based nanocomposites with different dosages were prepared respectively. Organic bentonite was selected through segregation test and routine index test, and the compatibility of organic bentonite and asphalt was characterized from the micro scale based on SEM, XRD and FTIR. Finally, its application properties were tested. The results show that organic bentonite can be uniformly dispersed in asphalt, and the organic bentonite with 4% content has the largest structural layer spacing in asphalt and has the strongest adsorption with asphalt, which can be used as the best content. The application performance indicates that the organic bentonite has a great improvement on the high temperature performance of the asphalt. But it has a negative impact on the low temperature performance, which provides a theoretical basis for further compounding other modifiers to make up for the single performance of the composite.

Key words: highway engineering; pavement material; organic bentonite; microscopic test; compatibility; application performance

摘要： 根据熔融插层复合的制备方法，分别制备几种不同掺量的无机和有机膨润土沥青基纳米复合材料，通过离析试验及常规指标试验筛选出有机膨润土，并基于SEM、XRD、FTIR从微观尺度表征了有机膨润土与沥青的相容性，最后检测了其应用性能。结果表明：有机膨润土可均匀的分散在沥青中，4%掺量的有机膨润土在沥青中的结构层间距最大且与沥青具有最强的吸附作用，可作为最佳掺量使用。应用性能表明：有机膨润土可以很大程度上改善沥青的高温性能，但对低温性能有负面影响，这为进一步复配其他改性剂来弥补复合材料的单项性能提供了理论依据。

关键词: 道路工程；路面材料；有机膨润土；微观结构；相容性；应用性能