Abstract：To investigate the mechanism of multiply recycled asphalt, the law of each component and colloidal instability index of asphalt in the multiply recycled process was analyzed by chemical composition test of asphalt with four-component test. The correlation between component and physical properties of penetration and ductility of asphalt was discussed. Based on the relationship among rejuvenating agent dosage,chemical composition and physical properties, the improvement effect of rejuvenating agent in the multiply recycled process was revealed. The results show that with the increasing of recycling numbers, the asphaltene content of asphalt is increased, while the aromatic content and colloid content are decreased. The saturated content is stable, and the colloid instability index is increased. The design of multiply recycled asphalt should focus on the coordination and matching of chemical components to improve the pavement property.
曾蔚，王杰，秦永春，王维营，张艳鸽. 沥青多次再生后的性能与其组分的关系分析[J]. 江苏大学学报（自然科学版）, 2022, 43(1): 119-124.
ZENG Wei, WANG Jie, QIN Yongchun, WANG Weiying, ZHANG Yange. Analysis on relationship between properties and components of asphalt after multiply recycling[J]. Journal of Jiangsu University(Natural Science Eidtion)
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2022, Vol. 43 
