Chen Mingyuan, Geng Jiuguang, He Leilei, Chen Huaxin, Hu Yongju
College of Engineering, Zhejiang Normal University, Jinhua, 321004, China.
Key Laboratory of Special Environment Road Engineering of Hunan Province, Changsha University of Science and Technology, Changsha, 410114, China.
Sci Rep. 2025 Jul 31;15(1):28005. doi: 10.1038/s41598-025-13785-8.
Wax has a significant influence on the durability of roofing and pavement. The paper investigated the effects of wax dosages (1%, 3% and 5%) on the performance of bitumen during ultraviolet aging systematically from the macro and micro perspectives. The high-medium-low temperature rheological performance and chemical composition of bitumens were mainly studied, and their light-thermal sensitivity was used by differential scanning calorimetry and ultraviolet spectrophotometer tests, respectively. The results show that as the wax dosage of bitumens increased, their complex modulus decreased and the fatigue life increased. Also, the UV absorbance of wax-containing bitumen was generally lower than that of unwaxed bitumen, while the trend of change in glass transition temperature was the opposite. Furthermore, the addition of wax and the aging procedure led to the growth of sulfoxide index and wax index, accompanied by good linear relationships. In general, waxes were more likely to combine with asphaltenes during the crystallization process.
蜡对屋面材料和路面的耐久性有显著影响。本文从宏观和微观角度系统研究了蜡用量（1%、3%和5%）对紫外线老化过程中沥青性能的影响。主要研究了沥青的高-中-低温流变性能和化学成分，并分别通过差示扫描量热法和紫外分光光度计测试来研究其光热敏感性。结果表明，随着沥青蜡用量的增加，其复数模量降低，疲劳寿命增加。此外，含蜡沥青的紫外线吸光度通常低于不含蜡的沥青，而玻璃化转变温度的变化趋势则相反。此外，蜡的添加和老化过程导致亚砜指数和蜡指数增长，且呈现良好的线性关系。总体而言，蜡在结晶过程中更易与沥青质结合。
