热诱导自愈合沥青混凝土研究综述:一种可持续路面材料  

Research Progress on Heat-induced Self-healing Asphalt Concrete:a Kind of Sustainable Pavement Material

作　　者：董素芬[1] 宋泽轩 张文辉 黄智德 韩宝国[3] DONG Sufen;SONG Zexuan;ZHANG Wenhui;HUANG Zhide;HAN Baoguo(Department of Transportation and Logistics,Dalian University of Technology,Dalian 116024,Liaoning,China;School of Transportation and Civil Engineering,Shandong Jiaotong University,Jinan 250357,China;Department of Civil Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]大连理工大学交通运输系,辽宁大连116024 [2]山东交通学院交通土建工程学院,济南250357 [3]大连理工大学土木工程系,辽宁大连116024

出　　处：《材料导报》2024年第22期11-22,共12页Materials Reports

基　　金：国家自然科学基金面上项目(52178188,51978127);国家自然科学基金青年科学基金项目(51908103)。

摘　　要：热诱导技术可以提高沥青混凝土的自愈合效率,改善路面的抗疲劳性能,延长其服役寿命并降低其全寿命周期成本,进而减少沥青混凝土生产和使用所产生的环境足迹(特别是碳足迹)。基于此,对沥青混凝土的电磁感应、微波和射线热诱导自愈合性能及其机理研究进行综述,并对沥青混凝土热诱导自愈合面临的主要难题和应用前景进行概述,以期为发展低碳及可持续路面提供支持。综述分析表明,调控并利用沥青混凝土的温度敏感性,分阶段实现裂缝界面沥青的流动与扩散是实现热诱导自愈合的关键;纤维状功能填料可使沥青混凝土在短时间产生高的热诱导自愈合效率,粒料类功能填料在长时加热后可赋予沥青混凝土高效自愈合性能;高导电和导热性功能填料对于电磁感应热诱导自愈合是不可缺少的;微波热诱导对沥青混凝土中的矿料进行加热,加入高导热和吸波性能功能填料均可改善其微波吸收能力,从而提高加热及自愈合效率;射线热诱导自愈合冷却过程快,不利于发挥降温过程的自愈合效果。在满足行车舒适性和安全性的前提下,低成本、低碳、高效以及操作安全是热诱导的应用基础,基于热诱导技术开发出智能、可自动响应、可持续的沥青混凝土是未来的发展方向。Thermal induction technology can improve the self-healing efficiency of asphalt concrete,increase the fatigue resistance,extend the service life,and reduce the life cycle cost of asphalt concrete pavement,thereby reducing environmental footprint(especially carbon footprint)ge-nerated by the production and usage of asphalt concrete.Here reviews the thermal induced self-healing properties and mechanisms of asphalt concrete based on electromagnetic,microwave and ray induction,then envisions it’s main challenges and application prospects to provide support for the development of low-carbon and sustainable pavement.It shows that regulation and utilization of the temperature sensitivity to realize the flow and diffusion of asphalt at the crack interface is the key to achieve thermal induced self-healing.Fibrous functional fillers with high thermal/electrical properties can make asphalt concrete produce high thermal induced self-healing efficiency in a short time,while granular functional fillers endow asphalt concrete with efficient self-healing performance after prolonged heating.Electromagnetic induced self-healing performance of asphalt concrete mainly depends on functional fillers.The mineral materials in asphalt concrete are heated by microwave,leading to low heating rates and efficiency.The microwave absorption capacity and self-healing efficiency can be improved by incorporating functional fillers with high thermal conductivity and wave absorbing properties.The cooling process of ray induced self-healing is too fast to get the realization of self-healing in the cooling process.Based on these,on the premise of driving comfort and safety,low-cost,low-carbon,efficient,and safe operation are the application foundations of thermal induction technology,and developing intelligent,automatically responsive,and sustainable asphalt concrete based on thermal induction technology is the future development direction.

关 键 词：沥青混凝土 自愈合 电磁感应热诱导 微波热诱导 射线热诱导 功能填料 沥青老化 

分 类 号：U414[交通运输工程—道路与铁道工程]