碲化镉发电智能融雪化冰系统下的沥青抗老化研究

Research on Asphalt Aging Resistance under the Intelligent Snow Melting and Deicing System of Cadmium Telluride Power Generation

摘要: 本文以四川高海拔地区久马高速中的碲化镉发电智能融雪化冰系统为研究背景，研究沥青路面在频繁加热下如何提高其抗老化性能。文中采用橡胶粉和废弃食用油作为外掺材料加入沥青中，橡胶粉掺量分别为0.3%、0.5%、0.7%，废弃食用油掺量为4%。分析二者的掺入对沥青三大指标、黏度及流变性能的影响。试验结果显示：三大性能试验二者可显著提高沥青高温稳定性，老化后与基质沥青相比，针入度降低、软化点和延度提升，薄膜烘箱老化后软化点等有相应变化。黏度试验显示，橡胶粉和废弃食用油掺入后未老化、薄膜烘箱老化、压力老化后的黏度较基质沥青均有提升，二者能抑制沥青胶体结构变化，橡胶粉掺量越大，压力老化下黏度提高越显著。流变性能试验显示，二者改变了沥青成分和结构，压力老化下，可降低复数剪切模量、提升相位角，提升抗老化性能和耐久性。

Abstract: Based on the research background of the intelligent snow melting and deicing system of cadmium telluride power generation in Jiuma Expressway in Sichuan high-altitude area, this paper studies how to improve the anti-aging performance of asphalt pavement under frequent heating. In the article, rubber powder and waste edible oil are used as external additives added to asphalt, with rubber powder content of 0.3%, 0.5%, and 0.7%, respectively, and waste edible oil content of 4%. Analyze the effects of the addition of the two on the three major indicators of asphalt, viscosity, and rheological properties. The test results show that both of the three performance tests can significantly improve the high-temperature stability of asphalt. Compared with the matrix asphalt after aging, the penetration degree decreases, the softening point and ductility increase, and there are corresponding changes in the softening point after film oven aging. The viscosity test showed that the viscosity of the untreated, film oven aged, and pressure aged asphalt with the addition of rubber powder and waste edible oil increased compared to the base asphalt. Both can suppress the changes in asphalt colloid structure, and the higher the amount of rubber powder added, the more significant the increase in viscosity under pressure aging. The rheological property test shows that both of them change the asphalt composition and structure. Under pressure aging, they can reduce the complex shear modulus, increase the phase angle, and improve the anti-aging performance and durability.