1.上海理工大学 环境与建筑学院，上海 200093;2.上海力进铝制工程有限公司，上海 200030;3.浙江致欣检测技术有限公司，浙江 嘉兴 314000
李秀君（1976—），女，江苏江阴人，上海理工大学教授，硕士生导师，博士.E-mail： 363096289@qq.com
李秀君（1976—），女，江苏江阴人，上海理工大学教授，硕士生导师，博士.E-mail： 363096289@qq.com
U414
1.School of Environment and Architecture， University of Shanghai for Science and Technology， Shanghai 200093， China;2.Netfortune (Shanghai) Aluminum Works Co.，Ltd.， Shanghai 200030， China;3.Zhejiang Zhixin Testing Technology Co.， Ltd.， Jiaxing 314000， China
分别制备了热氧老化沥青和热氧-紫外老化沥青，构建了新、旧沥青双层扩散模型，并且通过相对浓度与扩散系数的模拟计算、拉拔试验与荧光显微镜试验研究了新、旧沥青扩散融合程度与温度、沥青四组分的关系. 结果表明：热氧-紫外老化沥青更不易与基质沥青扩散融合，与基质沥青的黏附性较差；在10~40 ℃内，新、旧沥青能够快速扩散融合，超过40 ℃后，升高温度对扩散融合的促进作用逐渐减小，且对热氧-紫外老化沥青与基质沥青的扩散融合促进作用的减小速率更大；沥青四组分扩散系数的大小顺序依次为：饱和分>芳香分≥胶质>沥青质，经紫外老化后，四组分的扩散系数均有所下降，沥青质的降幅最大.
Thermo-oxygen aging asphalt and thermal oxygen-ultraviolet aging asphalt were prepared. The double-layers diffusion model of virgin and aging asphalt was constructed. Through the simulation calculation of relative concentration and diffusion coefficient， verification of pull-off tensile test and fluorescence microscope test， the relationship of diffusion degree with temperature and four components was analyzed. The results show that the thermal oxygen-ultraviolet aging asphalt is more difficult to diffusion with the virgin asphalt， and the adhesion with the virgin asphalt is poor. In the range of 10 ℃ to 40 ℃， the virgin and aging asphalt can diffuse rapidly. When the temperature is over 40 ℃， the promoting effect of increasing temperature on diffusion gradually decreases. The decreasing rate of promoting effect is greater for the diffusion of thermal oxygen-ultraviolet asphalt and virgin asphalt. The diffusion coefficients of four components of asphalt from large to small are in the order： saturate>aromatic≥resin>asphaltene. After ultraviolet aging， the diffusion coefficients of the four components decrease. Among them， asphaltene declines most significantly.
李秀君,董力铭,孙悦,张恒,赵麟昊.不同老化方式下新旧沥青的扩散融合[J].建筑材料学报,2024,27(2):121-131
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