摘要
介绍了沥青的老化机理。介绍通过室内模拟加速老化试验(短期热氧老化试验、长期热氧老化试验和长期光热老化试验)和对沥青的四组分分析,研究了沥青在拌和、铺筑和使用过程中光氧、热氧老化机理。以及沥青老化表征的一些方法。在老化过程中沥青的芳香分含量均显著减少,沥青质的含量均明显增加,饱和分只有少量的挥发衰减;在短期热氧老化和长期光氧老化试验中胶质含量均降低,但在长期热氧老化中胶质含量增加。
The mechanisms of aging of asphalt are described in this paper. This paper introduced the influence of heat, oxygen and UV-light on chemical component and physical properties of asphalt through thin film oven test （TFOT）, UV-irradiation test and long-time oxidation test. And some simple and feasible way to study the aging of road asphalt. The Changes of content of saturants, aromatics and asphaltenes were similar during the three kinds of aging test, i.e. the saturants content almost kept invariable, the aromatics content obviously decreased and the asphaltenes content remarkably increased. However, the change of resin content was different , it increased in long - time oxidation test but decreased in the other aging test.
出处
《建材世界》
2009年第2期159-162,共4页
The World of Building Materials
关键词
沥青
光氧老化
热氧老化
asphalt
UV-irradiation aging
long-time oxidation aging
