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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2026, Vol. 45 ›› Issue (6): 34-41.DOI: 10.3969/j.issn.1674-0696.2026.06.05

• 智慧交通基础设施 • 上一篇    

两种RAP预处理技术下的再生超薄罩面混合料性能对比

张恺1，樊向阳1，鄢春鹏1，周陈哲2，董夫强2   

  1. (1. 江西省交投养护科技集团有限公司，江西 南昌 330299； 2. 河海大学 土木与交通学院，江苏 南京 210098)
  • 收稿日期:2025-10-28 修回日期:2025-12-26 发布日期:2026-07-10
  • 作者简介:张恺（1984—），男，江西南昌人，正高级工程师，博士研究生，主要从事道路建材方面的研究。E-mail：kaizhang@whut.edu.cn 通信作者：周陈哲（2002—），男，江苏苏州人，硕士研究生，主要从事道路建材方面的研究。E-mail：1443166267@qq.com
  • 基金资助:
    江西省交通运输厅科技项目(2023Z0001)；江西省重点研发计划项目(20252BCG330027)；国家自然科学基金项目(52278451)

Performance Comparison of Recycled Ultra-thin Overlay Mixtures under Two Kinds of RAP Pre-processing Technologies

ZHANG Kai1, FAN Xiangyang1, YAN Chunpeng1, ZHOU Chenzhe2, DONG Fuqiang2   

  1. (1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. Chongqing Jiangjin District Highway Affairs Center, Chongqing 402260, China; 3. College of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China; 4. China 19th Metallurgical Group Co., Ltd., Chengdu 610036, Sichuan, China; 5. Shandong Energy Group Co., Ltd., Heze 274900, Shandong, China)
  • Received:2025-10-28 Revised:2025-12-26 Published:2026-07-10

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摘要： 为了对比精细分离与常规破碎这两种RAP预处理技术对再生超薄罩面混合料性能影响，首先评价了这两种技术下再生超薄罩面混合料的路用性能；进而基于SEM扫描电镜及分子模拟，建立了混合料中新-旧沥青以及再生沥青-集料的界面模型，并对比评价其界面性能。研究结果表明：与常规破碎技术相比，精细分离技术下的超薄罩面混合料具有更好的水稳定性、低温抗裂性能(50%掺量下残留稳定度与弯曲抗拉应变分别提升5.7%与5.3%)和界面性能(新旧沥青界面与沥青-集料界面黏结性能分别提升21.0%和29.3%)，但高温性能稍差(50%掺量下动稳定度下降5.5%)；基于路用性能达标考虑，常规破碎技术下再生超薄罩面混合料的RAP掺量为30%，精细分离技术可达50%。

关键词: 道路工程；RAP；超薄罩面混合料；精细分离；路用性能；分子模拟

Abstract: To compare the effects of two RAP pretreatment techniques, namely fine separation and conventional crushing, on the performance of recycled ultra-thin overlay mixtures, the road performance of these mixtures under these two pretreatment techniques was first evaluated. Furthermore, based on SEM and molecular simulation, interface models of new-old asphalt and recycled asphalt-aggregate in the mixture were established, and the interface performance was comparatively evaluated. The research results show that compared with the conventional crushing technique, the ultra-thin overlay mixtures prepared by fine separation technique exhibit better moisture stability, low-temperature crack resistance (at 50% RAP content, the residual stability and flexural tensile strain increase by 5.7% and 5.3%, respectively) and interface performance (the bonding performance of new-old asphalt interface and asphalt-aggregate interface increases by 21.0% and 29.3%, respectively), but slightly worse high-temperature performance (at 50% RAP content, the dynamic stability decreases by 5.5%). Considering meeting the road performance standards, the RAP content of recycled ultra-thin overlay mixtures under conventional crushing technique is 30%, while that under fine separation technique can reach 50%.

Key words: road engineering; RAP; ultra-thin overlay mixtures; fine separation; road performance; molecular simulation

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