沥青混合料自愈合技术研究进展

Research Progress on Self-healing Technology of Asphalt Mixture

由于车辆荷载和各种环境因素的影响,沥青路面不可避免地产生老化、硬化、疲劳破坏等现象,从而导致路面使用性能降低。因此,沥青混合料自愈合智能型路面受到中外学者的广泛关注。基于中外文献研究,系统梳理了沥青混合料自愈合行为理论,即表面分子扩散理论、表面能理论和毛细管流动理论的基本原理,深入分析了影响沥青混合料自愈合行为的内在因素与外在因素,归纳整理了沥青混合料自愈合行为的增强技术,指出现有研究的不足并展望今后在沥青混合料自愈合技术领域未来的发展方向,研究成果为高抗疲劳道路沥青混合料的研制奠定了基础。

Due to the influence of vehicle load and various environmental factors,asphalt pavement inevitably produces aging,hardening,fatigue damage,and other phenomena,which lead to the degradation of pavement performance.Therefore,in order to prolong the service life of asphalt pavement,the self-healing intelligent pavement of asphalt mixture has been widely concerned by Chinese and foreign scholars.Based on domestic and foreign literature research,the basic principles of asphalt mixture self-healing behavior theory were systematically reviewed.The internal and external factors affecting the self-healing behavior of asphalt mixtures were deeply analyzed,and the enhancement technologies for the self-healing behavior of asphalt mixtures were summarized.The deficiencies of the existing research were pointed out and the future development direction in the field of asphalt mixture self-healing technology was prospected.The research results lay a foundation for the development of high-fatigue road asphalt mixture.