新疆严寒区UV老化下的沥青路面抗损劣性能研究  

Research on Anti-damage Performance of Asphalt Pavement Under UV Aging in Severe Cold Region of Xinjiang

作　　者：李文博 张双侠[1] 史倩倩 于明明[1] LI Wenbo;ZHANG Shuangxia;SHI Qianqian;YU Mingming(Xinjiang Agricultural Vocational Technical College,Changji 831100,Xinjiang,China;National Engineering Laboratory of Highway Maintenance Technology,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]新疆农业职业技术学院,新疆昌吉831100 [2]长沙理工大学公路养护技术国家工程实验室,长沙410114

出　　处：《材料导报》2022年第21期100-105,共6页Materials Reports

基　　金：新疆维吾尔自治区自然科学基金(2021D01B70);新疆高校科研计划项目(XJEDU2021Y056)。

摘　　要：为减缓新疆严酷环境下沥青面层结构性能劣化,在沥青混合料中同时掺加纳米TiO_(2)和玄武岩纤维,通过模拟紫外线辐射试验环境,开展UV老化后的纳米TiO_(2)沥青胶浆三大指标、红外光谱和扫描电镜试验,并对新疆两种典型面层沥青混合料AC-16和SMA-16进行UV老化下的冻融劈裂、高温车辙、半圆弯拉(SCB)和四点弯曲疲劳寿命试验,研究分析纳米TiO_(2)和玄武岩纤维复合增强的沥青混合料结构的抗损劣性能。研究结果表明:3.0%(占沥青质量分数)的纳米TiO_(2)可有效抗阻沥青胶浆老化带来的性能衰减;UV老化的损劣作用会严重削弱AC-16和SMA-16沥青混合料的路用性能和疲劳寿命;添加纳米TiO_(2)和玄武岩纤维能显著提高AC-16和SMA-16的路用性能,并能有效增强UV老化下的沥青混合料结构抗阻冻融损伤、高温变形、低温开裂和疲劳损伤的能力。To mitigate the structural performance deterioration of asphalt surface layers under the harsh environment in Xinjiang,by blending the nano-TiO_(2)and the basalt fibers into the asphalt mixture simultaneously,the experiment of the nano-TiO_(2)asphalt mastic after UV aging was conducted under a simulated UV-radiation test environment,including three major indicators,infrared spectra and scanning electron microscopy.In this study,four experiments were conducted,including freeze-thaw splitting test,high-temperature rutting test,semicircular bending and pulling(SCB)test,and four-point bending fatigue life test under UV aging on two typical surface asphalt mixtures AC-16 and SMA-16 in Xinjiang.Through these tests,this study aims to analyze the damage resistance of the asphalt mixture structure reinforced with nano-TiO_(2)and basalt fiber composite.The results show that 3.0%(mass fraction of asphalt)of nano-TiO_(2)can effectively resist the degradation of asphalt mastic due to aging.The deteriorating effect of UV aging can seriously weaken the road performance and fatigue life of AC-16 and SMA-16 asphalt mixtures.However,by adding nano-TiO_(2)and basalt fiber,the road performance of AC-16 and SMA-16 can be significantly improved,and also can effectively enhance the ability of asphalt mixture structure under UV aging to resist freeze-thaw damage,high-temperature deformation,low temperature cracking,and fatigue damage.

关 键 词：沥青路面 UV老化 纳米TiO_(2) 玄武岩纤维 路用性能 结构损伤 

分 类 号：U414[交通运输工程—道路与铁道工程]