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To investigate the influence of red mud on the anti-aging properties of asphalt mastic and its underlying mechanisms, this study focuses on asphalt mastic as the research subject. The relationship between the dosage of sintered red mud and the anti-aging performance of asphalt was mapped using the aging index. The anti-aging mechanism of sintered red mud was revealed through Fourier transform infrared spectroscopy(FTIR) peak analysis, ultraviolet-visible absorption spectroscopy(UV-vis), and gel permeation chromatography(GPC). The results indicate that asphalt mastic modified with 4% sintered red mud exhibits the strongest resistance to thermal-oxidative aging and UV aging, with the lowest increments in softening point, viscosity aging index, and complex modulus aging index, comparable to those of commercial antiaging agents. FTIR and GPC analyses reveal that sintered red mud adsorbs the light components in asphalt, delaying the transformation of heavy components under thermal-oxidative conditions. UV-vis analysis shows that sintered red mud has a strong ability to shield ultraviolet light in asphalt mastic, thereby mitigating UV aging. Comprehensive analysis demonstrates that sintered red mud at a 4% dosage can effectively slow down the thermal-oxidative and UV aging rates of asphalt mastic, providing an effective solution to pavement aging issues.
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Basic Information:
DOI：10.20203/j.cnki.2095-8919.2026.02.001
China Classification Code:U414
Citation Information:
[1]Zhang Wanguo,Wang Shilong,Zhu Shiqi ,et al.Study on the influence law and mechanism of red mud modified asphalt mastic on anti-aging properties[J].Journal of Jilin Jianzhu University,2026,43(02):1-10.DOI:10.20203/j.cnki.2095-8919.2026.02.001.
Fund Information:
国家自然科学基金项目(52478457)
2026-04-15
2026-04-15