沥青胶结料自愈合研究进展

Research Progress on Self-healing of Asphalt Binder

沥青自愈合是提高沥青路面使用寿命的有效手段之一,文章综合分析了近年来国内外沥青胶结料自愈合机理、实验方法、评价指标和自愈合技术等方面的研究,并指出现有机理模型难以解释温度、间歇时间和老化对沥青胶结料自愈合行为的影响,缺少科学有效的自愈合行为评价方法与指标,使得自愈合技术难以在工程中推广应用。建议综合现有自愈合机理宏微观模型理论,建立多尺度模型解释沥青胶结料的自愈合行为,提出具有普适性的实验方法和评价沥青胶结料自愈合行为的指标,并指出开发新型沥青自愈合增强剂是未来研究的热点。

The self-healing capacity of asphalt binder is an effective way to improve the service life of asphalt pavement.This paper not olny presents the recently developed mechanism,test method,evaluating indicator and self-healing technology of asphalt binder,but also points out the shortcomings of existing research,for example:the models are difficult to explain the influence of temperature,rest time and aging on the self-healing behavior of asphalt binder,lack of scientific and effective self-healing behavior to evaluate methods and indexes,self-healing technology is difficult in the engineering application.Comprehensive existing self-hea-ling mechanism of macro and micro model theory,a multiscale model is proposed to explain the asphalt self-healing behavior,the self-healing universal test method and index of evaluation of asphalt binder and behavior,exploitation novel asphalt self-healing agent will be the hot issue in the future.