沥灰比对水泥乳化沥青砂浆疲劳性能的影响

doi:10.16552/j.cnki.issn1001-1625.2025.0317

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (9): 3472-3482.DOI: 10.16552/j.cnki.issn1001-1625.2025.0317

沥灰比对水泥乳化沥青砂浆疲劳性能的影响

金珊珊^1,2, 李响^1,2, 张扬^1,2, 刘鹏飞^1,2, 王志华^1,2, 李刘欢^1,2, 赵耀东^1,2

1.北京建筑大学土木与交通工程学院,北京 100044;
2.北京市城市交通基础设施建设工程技术研究中心,北京 100044

收稿日期:2025-03-24 修订日期:2025-04-30 出版日期:2025-09-15 发布日期:2025-09-19
作者简介:金珊珊(1981—),女,博士,副教授。主要从事新型功能路面材料的研究。E-mail:jinshanshan@bucea.edu.cn
基金资助:
国家重点研发计划(2022YFC3803403)

Effect of Asphalt/Cement Ratio on Fatigue Properties of Cement-Emulsified Asphalt Mortar

JIN Shanshan^1,2, LI Xiang^1,2, ZHANG Yang^1,2, LIU Pengfei^1,2, WANG Zhihua^1,2, LI Liuhuan^1,2, ZHAO Yaodong^1,2

1. School of Civil Engineering and Transportation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. Beijing Urban Transportation Infrastructure Engineering Technology Research Center, Beijing 100044, China

Received:2025-03-24 Revised:2025-04-30 Published:2025-09-15 Online:2025-09-19

摘要/Abstract

摘要： 水泥乳化沥青(CA)砂浆作为无砟轨道结构的缓冲层,在车轮荷载的反复作用下会发生疲劳破坏。本研究基于单轴压缩试验和疲劳试验探究了应力比与沥灰比(A/C)对CA砂浆疲劳寿命的影响,构建了包含应力比(0.6~0.8)与A/C(0.4~0.7)的CA砂浆疲劳寿命预测方程,并阐明了方程的物理意义,最后从微观的角度揭示了CA砂浆的疲劳损伤机理。结果表明:随着A/C增大,CA砂浆抗压强度随龄期的增长速度减慢,沥青逐步替代水泥水化产物成为连续相,CA砂浆性能接近沥青胶砂,韧性增强;在相同应力比对应的疲劳荷载作用下,CA砂浆的疲劳寿命随A/C增大而逐渐增大;以应力比与A/C为参数构建的疲劳方程可较好地预测CA砂浆的疲劳寿命,预测值与实测值的平均误差为6.9%。研究成果可为后期预测CA砂浆疲劳寿命提供依据。

关键词: 水泥乳化沥青砂浆, 疲劳寿命, 沥灰比, 应力比, 微观形貌, 损伤

Abstract: Cement-emulsified asphalt (CA) mortar, used as a cushion layer in ballastless track structures, is subject to fatigue damage under repeated wheel loading. In this study, the effects of stress ratio and asphalt/cement ratio on the fatigue life of CA mortar were investigated based on uniaxial compression test and fatigue test. The CA mortar fatigue life prediction equations incorporating stress ratios (0.6 to 0.8) and A/C (0.4 to 0.7) were constructed. The physical significance of equations was also elucidated, and finally the fatigue damage mechanism of CA mortar was revealed from a microscopic point of view. The results show that the growth rate of CA mortar compressive strength with age decreases as A/C increasing, asphalt gradually replaces cement hydration products as a continuous phase, and CA mortar properties approach those of asphalt mortar with enhanced toughness. The fatigue life of CA mortar gradually increases with increasing A/C under fatigue loading corresponding to the same stress ratio. The fatigue equation constructed with stress ratio and A/C as parameters can accurately predict the fatigue life of CA mortar with an average error of 6.9% between the predicting and actual values. The research results can provide a basis for predicting the fatigue life of CA mortar at a later stage.

Key words: cement-emulsified asphalt mortar, fatigue life, asphalt/cement ratio, stress ratio, microstructure, damage

中图分类号:

U214.9

金珊珊, 李响, 张扬, 刘鹏飞, 王志华, 李刘欢, 赵耀东. 沥灰比对水泥乳化沥青砂浆疲劳性能的影响[J]. 硅酸盐通报, 2025, 44(9): 3472-3482.

JIN Shanshan, LI Xiang, ZHANG Yang, LIU Pengfei, WANG Zhihua, LI Liuhuan, ZHAO Yaodong. Effect of Asphalt/Cement Ratio on Fatigue Properties of Cement-Emulsified Asphalt Mortar[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(9): 3472-3482.

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沥灰比对水泥乳化沥青砂浆疲劳性能的影响

Effect of Asphalt/Cement Ratio on Fatigue Properties of Cement-Emulsified Asphalt Mortar

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