Behavior Characteristics of Asphalt Components during the Process of Nano-cracks Temperature Self-healing

Abstract

In order to investigate the behavior characteristics of asphalt components during the process of nano-cracks temperature self-healing (NTS), molecular simulation technology was used to simulate the temperature self-healing of asphalt. Based on the determination of asphalts (virgin asphalt and aged asphalt), the proportional changes of asphalt components were confirmed. The distribution characteristics of asphalt components were obtained by marking different components in the process of NTS. At the same time, the rationality of the micro simulation findings was confirmed by asphalt performance tests and infrared spectroscopy results. The results show that different asphalt components have different behavior characteristics in the process of NTS. The content of asphaltene and resin plays a key role in the process of NTS, while saturation and aromatics play an active role in the temperature self-healing before and after aging. The NTS is the result of the comprehensive action of different components, and the self-healing efficiency is proportional to the relative molecular mass. The effect of aging on the NTS is also realized by changing the proportion of asphalt components.

Keywords

asphalt components / behavior characteristics / nano-cracks / temperature self-healing / molecular simulation

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