[1]林梅,雷雨涛,刘汉青,等.基于修正VECD模型的再生沥青胶浆疲劳特性研究[J].长安大学学报(自然科学版),2026,46(01):55-65.[doi:10.19721/j.cnki.1671-8879.2026.01.004]
　LIN Mei,LEI Yu-tao,LIU Han-qing,et al.Research on fatigue characteristics of reclaimed asphalt mastic based on modified VECD model[J].Journal of Chang’an University (Natural Science Edition),2026,46(01):55-65.[doi:10.19721/j.cnki.1671-8879.2026.01.004]
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基于修正VECD模型的再生沥青胶浆疲劳特性研究()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第46卷
期数:
2026年01期
页码:
55-65
栏目:
道路工程
出版日期:
2026-01-31

文章信息/Info

Title:
Research on fatigue characteristics of reclaimed asphalt mastic based on modified VECD model
文章编号:
1671-8879(2026)01-0055-11
作者:
林梅1; 雷雨涛1; 2; 刘汉青1; 王乔丹3*; 刘伟荣3
(1. 兰州理工大学 土木与水利工程学院,甘肃 兰州 730050; 2. 甘肃路桥善建科技有限公司,甘肃 兰州 730300; 3. 甘肃公航旅石墨烯科技发展有限责任公司,甘肃 兰州 730311)
Author(s):
LIN Mei1;  LEI Yu-tao1; 2;  LIU Han-qing1;  WANG Qiao-dan3*;  LIU Wei-rong3
(1. School of Civil and Hydraulic Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China; 2. Gansu Road and Bridge Shanjian Technology Co., Ltd., Lanzhou 730300, Gansu, China; 3. Gansu HATG Graphene Science and Technology Development Co., Ltd., Lanzhou 730311, Gansu, China)
关键词:
路面工程;  再生沥青胶浆;  修正VECD模型;  疲劳损伤;  疲劳寿命
Keywords:
pavement engineering;  reclaimed asphalt mastic;  modified VECD model;  fatigue damage;  fatigue life
分类号:
U414
DOI:
10.19721/j.cnki.1671-8879.2026.01.004
文献标志码:
A
摘要:
采用石灰岩、KL90和废旧沥青混合料的抽提再生沥青制备了不同粉胶比的6种沥青胶浆,基于线性振幅扫描(LAS)试验测试了不同矿粉类型和粉胶比的基质与再生沥青胶浆的疲劳性能; 借助黏弹连续损伤(VECD)理论,引入最大应变系数修正了VECD模型,并采用应力峰值和初始模量下降35%这2种失效判定方法进行了基质与再生沥青胶浆疲劳失效的对比分析和寿命预测。研究结果表明:修正VECD模型及简化方法可有效减小由于模型系数初始值猜测以及试件平行样变异性导致的疲劳寿命结果差异性,相同条件下,基质沥青胶浆比再生沥青胶浆更快破坏,并在加载应变为17%～30%处出现了应力-应变的非规律变化,这是由于高应变条件导致沥青胶浆失去黏弹性特征而发生破坏,且相比低粉胶比试样,高粉胶比试样承受高应变荷载的能力弱; 粉胶比的增大会加快沥青胶浆的疲劳损伤速率,并缩短疲劳寿命,这是由于高粉胶比下沥青胶浆刚性增强,沥青膜变薄,从而加剧了应力集中,加入最佳掺量再生剂的再生沥青胶浆的疲劳寿命完全可以得到恢复; 建议采用应力峰值失效点分析再生沥青胶浆的疲劳性能,以避免由于试样变异系数过大导致的误差,同时提高疲劳寿命结果的计算可靠性; 最大应变取2.5%和5.0%时,计算所得厚沥青路面结构的抗疲劳性能优于薄路面结构。
Abstract:
Six types of asphalt mastics with different filler-binder ratios were prepared by limestone, KL90 and extracted and regenerated asphalt from waste asphalt mixture. Based on linear amplitude sweep(LAS)tests, the fatigue performance of base asphalt and reclaimed asphalt mastics with different mineral powder types and filler-binder ratios was tested. With the help of viscoelastic continuous damage(VECD)theory, the maximum strain coefficient was introduced to modify the VECD model, and two failure determination methods, namely stress peak and initial modulus reduction of 35%, were used to comparatively analyze the fatigue failure and predict the life of base asphalt and reclaimed asphalt mastic. The research results indicate that the modified VECD model and simplified approach can effectively reduce the differences in fatigue life results caused by guessing the initial values of the model coefficients and the variability of parallel specimens. Under the same condition, the base asphalt mastic shows faster failure than the reclaimed asphalt mastic and exhibits irregular stress-strain change at loading strains of 17%-30%. This is due to the loss of viscoelastic characteristics of asphalt mastic caused by high strain condition. Compared to low filler-binder ratio specimens, high filler-binder ratio specimens have weaker ability to withstand high strain load. The increase in the filler-binder ratio increases the fatigue damage rate of asphalt mastic and shorten its fatigue life. This is because under high filler-binder ratio, the rigidity of asphalt mastic enhances and the asphalt film becomes thinner, exacerbating the stress concentration. The fatigue life of reclaimed asphalt mastic with the optimal dosage of rejuvenator can fully restore. It is recommended to use the stress peak failure points to analyze the fatigue performance of reclaimed asphalt mastic to avoid errors caused by excessive specimen variation coefficients and improve the reliability of the calculated fatigue life results. The calculated fatigue resistance of thick asphalt pavement structures is superior to that of thin pavement structures when the maximum strain is taken as 2.5% and 5.0%.8 tabs, 7 figs, 32 refs.

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备注/Memo

备注/Memo:
收稿日期:2025-07-23
基金项目:国家自然科学基金项目(52468066,52268070); 国有资本经营预算支持省属企业科研项目(2025GZ045); 甘肃省自然科学基金项目(25JRRA072); 兰州市青年科技人才创新项目(2024-QN-105); 甘肃省科学技术厅技术开发项目(2025-GHLSMX-TQT14)
作者简介:林 梅(1983-),女,山东烟台人,副教授,工学博士,从事绿色低碳道路工程材料研究,E-mail:280759800@qq.com。
通信作者:王乔丹(1990-),女,甘肃兰州人,工程师,E-mail:15101310099@qq.com。
更新日期/Last Update: 2026-02-20