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由于橡胶沥青的高黏度,使得对其性能的研究往往忽视了一些重要外部条件(如紫外线辐射等)的影响,文章为了研究紫外线辐射作用对橡胶沥青动态流变性能的影响,通过辐射条件的调查、老化试验设置、预测模型分析,进行了6种不同条件的紫外线老化试验,并分析了包括原样橡胶沥青在内的7种样品的动力学特性。结果表明:紫外线辐射对橡胶沥青的性能有较为明显的影响,紫外线辐射时间增加,动力学参数G*/sinδ增大,3个月前后样品的G*/sinδ有显著差异,老化后样品的失效温度明显高于原样橡胶沥青,得到的紫外线辐射老化程度参数能为动力学试验提供反向指导,且建立的动态力学非线性衰减方程能够很好的模拟试验结果。
Due to the high viscosity of rubber bitumen, the study of its properties often neglects the influence of some important external conditions (such as UV radiation, etc.). In order to study the effect of UV radiation on the dynamic rheological properties of rubber bitumen, , Aging test setup and predictive model analysis. UV aging tests were carried out under six different conditions. The kinetic characteristics of seven samples including asphalts were analyzed. The results showed that UV radiation had a significant effect on the properties of rubber asphalt, UV irradiation time increased, the kinetic parameters of G * / sinδ increased, G * / sinδ of samples before and after 3 months were significantly different, aging samples failed The temperature is obviously higher than that of the original rubber asphalt, and the obtained parameters of ultraviolet radiation aging can provide reverse guidance for the dynamic experiment. The dynamic nonlinear damping equation established can well simulate the experimental results.