混溶热再生沥青流变与黏塑性模型研究

兰州理工大学学报 ›› 2025, Vol. 51 ›› Issue (6): 125-132.

混溶热再生沥青流变与黏塑性模型研究

王盟^1,2, 李萍^*2, 刘斌², 丁攀³, 翟晓成⁴

1.嘉兴南湖学院建筑工程学院, 浙江嘉兴 314001;
2.兰州理工大学土木与水利工程学院, 甘肃兰州 730000;
3.甘肃省兰州公路事业发展中心, 甘肃兰州 730000;
4.甘肃省兰州公路事业发展中心高速公路养护所, 甘肃兰州 730000

收稿日期:2022-05-11 发布日期:2025-12-31
通讯作者: 李萍(1972-),女,江苏靖江人,博士,教授.Email:lzlgliping@126.com
基金资助:
国家自然科学基金(52268070,52368066),甘肃省交通运输厅科研项目(2023-02)

Rheological properties and viscoplastic model of asphalt in miscible recycling asphalt mixture

WANG Meng^1,2, LI Ping², LIU Bin², DING Pang³, ZHAI Xiao-cheng⁴

1. School of Civil Engineering and Architecture, Jiaxing Nanhu University, Jiaxing 314001, China;
2. School of Civil and Hydraulic Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
3. Lanzhou Highway Development Center of Gansu Province, Lanzhou730000, China;
4. Lanzhou Highway Development Center Expressway Maintenance Station, Lanzhou 730000, China

Received:2022-05-11 Published:2025-12-31

摘要/Abstract

摘要： 新、旧沥青与再生剂混溶后的流变特性直接影响大掺量再生沥青混合料的性能.采用傅里叶红外光谱仪、动态剪切流变仪,研究了不同比例新、旧沥青与再生剂混溶后的特征官能团、复数模量及不可恢复蠕变柔量的变化规律.基于多应力蠕变恢复试验结果和黏塑性应变模型对沥青力学响应进行预测,并分析了大掺量热再生沥青混合料的路用性能.结果表明:羰基面积指数与沥青指标相关性较差;限制折合亚砜基与芳香族面积指数的范围可有效控制混溶再生沥青再生效果;VP黏塑性应变模型可以评价再生沥青在重复蠕变恢复时的应变响应;建议在混合料配合比设计阶段先调和新旧沥青,然后确定再生剂最佳掺量,以控制混溶再生沥青流变性能.

关键词: 混溶热再生沥青, 蠕变恢复, 流变性能, 黏塑性模型

Abstract: The rheological properties of blended original and aged asphalt with the recycled agent miscible affect the performance of large-mix recycled asphalt mixtures directly. Fourier infrared spectroscopy (FTIR), dynamic shear rheometry (DSR), and multi-stress creep recovery test (MSCR) were used to study the changes of characteristic functional groups, complex modulus, and irrecoverable creep flexibility after miscibility of different proportions of original asphalt, aging asphalt and regenerant. The mechanical response of asphalt is predicted based on the results of the multi-stress creep recovery test and viscoplastic strain model (VP model). A comparative analysis of the road performance of large-dose hot recycled asphalt mixtures was conducted. The results show that the carbonyl index is poorly correlated with the conventional asphalt indices. The regeneration effect of miscible hot recycled asphalt can be effectively controlled by using a range of folded sulfoxide group and aromatic characteristic functional group area index. The VP visco-plastic strain model accurately captures the strain response of rejuvenated asphalt under repeatedcreep-recovery loading. It is recommended that, during mixture design, original and aged asphalt be blended first, followed by the determination of the optimal rejuvenator dosage to ensure desirable rheological properties of the rejuvenated binder.

Key words: miscible hot recycled asphalt, creep recovery, rheological properties, viscoplastic model

中图分类号:

U414

王盟, 李萍, 刘斌, 丁攀, 翟晓成. 混溶热再生沥青流变与黏塑性模型研究[J]. 兰州理工大学学报, 2025, 51(6): 125-132.

WANG Meng, LI Ping, LIU Bin, DING Pang, ZHAI Xiao-cheng. Rheological properties and viscoplastic model of asphalt in miscible recycling asphalt mixture[J]. Journal of Lanzhou University of Technology, 2025, 51(6): 125-132.

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