道路沥青紫外老化及抗老化材料研究综述  

Review on Ultraviolet Aging and Anti-aging Materials of Road Asphalt

作　　者：孔令云[1,2] 席晗 KONG Lingyun;XI Han(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;National and Local Joint Engineering Laboratory of Transportation Civil Engineering Materials,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆交通大学交通土建工程材料国家地方联合工程实验室,重庆400074

出　　处：《材料导报》2024年第1期44-56,共13页Materials Reports

基　　金：国家自然科学基金(51508062)。

摘　　要：道路沥青材料在使用过程中由于长期受到太阳光紫外辐射作用会产生紫外老化现象,并且这种现象在紫外辐射强度高的地区更明显。紫外老化会使沥青的物理特性和化学组成发生改变,从而导致沥青黏塑性上升、低温和疲劳性能下降、使用裂缝增加,进而劣化路面的耐久性、影响沥青路面的运营品质和服役寿命。为了防止和延缓紫外老化的产生和发展,可在道路沥青中添加抗老化材料以增强其抵御紫外老化能力,同时延长沥青路面的使用寿命并降低其性能的衰变速率。本文阐述了基于自由基和胶体理论的紫外老化机理;从处理方式、光源与辐射强度选择等方面介绍了室内模拟老化试验条件;总结了紫外老化对沥青物理和流变性能、组分构成、微观形貌、特征峰和官能团等宏微观特性的影响;归纳了现行抗老化材料的优缺点和使用情况。分析表明后期可在老化机理深度、试验方法标准化、室外老化监测、微观数值模拟、抗紫外老化剂针对性和抑制紫外老化措施等方面开展进一步研究。The ultraviolet(UV)aging of asphalt pavement due to long-term exposure to sunlight radiation is among the reasons causing pavement in-service performance decaying,which frequently occurs in areas equipped with high UV radiation intensity.UV aging gives rise to the varying of physical properties and chemical composition of asphalt,further increases visco-plasticity,decreases low temperature performance and fatigue performance,results in the pavement’s cracking risk,thus undermines the durability of the asphalt pavements.To prolong the pavement’s ser-vice life,anti-aging materials is considered to reduce the asphalt pavement UV aging and lower its mechanical performance decaying rate by adding it into the asphalt mixture.This paper illustrates the UV aging mechanism based on the free radical and colloid theories.The indoor simulated aging test conditions are introduced in perspective of treatment,light source and radiation intensity selection.The effects of UV aging on the asphalt’s macro and micro properties are summarized in aspects of physical and rheological properties,component composition,micromorphology,characteristic peaks and functional groups.The advantages,disadvantages and usage of current anti-aging materials are revealed as well.This paper concludes that the asphalt materials aging mechanism,standardization of test methods,outdoor aging monitoring,microscopic nume-rical simulation,targeting of anti-UV aging agents and UV aging inhibition measures deserve further research.

关 键 词：道路沥青 紫外老化 老化机理 室内模拟老化 沥青特性影响 抗紫外老化材料 

分 类 号：U414[交通运输工程—道路与铁道工程] TB332[一般工业技术—材料科学与工程]