Experimental Study on the Performance Degradation of Cement Asphalt Mortar Subjected to Combined Freeze-Thaw Cycles and Fatigue Load
WU Xi1,2, ZHENG Ning3, LI Lufan1,2,*, SUN Miaomiao1,2, ZHOU Xinzhu3
1 Department of Civil Engineering,Hangzhou City University,Hangzhou 310015, China 2 Zhejiang Engineering Research Center of Intelligent Urban Infrastructure, Hangzhou City University, Hangzhou 310015, China 3 College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310032, China
Abstract: To study the effects of freeze-thaw cycles and fatigue load on the performance of cement asphalt mortar (CA mortar), three damage experiments, namely single freeze-thaw cycles, single fatigue loading, and combined fatigue loading after freeze-thaw cycles, were conducted on CA mortar specimens. The changes in mortar surface morphology and final failure mode under different damage degrees, as well as the degradation laws of different parameters such as deformation curve, compressive strength, and relative elastic modulus were studied. At the same time, computer tomography (CT) was used to track the entire process of internal damage development of the specimens to explore its damage mechanism from the microscopic level. The findings show that both single freeze-thaw cycles and single fatigue loads causes a reduction in the uniaxial compressive strength and elastic modulus of CA mortar. Under the action of fatigue load after freeze-thaw cycles, with the increase in the number of freeze-thaw cycles, the plastic deformation energy of CA mortar during fatigue continuously increases. After 10 freeze-thaw cycles, the fatigue plastic deformation energy increases by approximately 71.2%. Under the action of fatigue load after freeze-thaw cycles, with the increase in the number of freeze-thaw cycles, the damage amplitudes of compressive strength and elastic modulus of CA mortar during fatigue continuously intensify. After 2 000 fatigue cycles, the compressive strengths of CA mortar with 0, 5, and 10 freeze-thaw cycles are reduced by 12.0%, 16.13% and 18.47%, respectively, and the elastic moduli are reduced by 10.25%, 16.92%, and 20.96%, respectively. The CT scanning test shows that freeze-thaw cycles lead to the degradation of internal pores in CA mortar, and accelerate the expansion and extension of cracks in CA mortar during fatigue, as well as the development of damage.
1 Yuan Q, Xiang G K, Zheng X G, et al. Journal of the China Railway Society, 2024, 24(12), 1(in Chinese). 元强, 向功坤, 郑新国, 等. 铁道学报, 2024, 24(12), 1. 2 Xu H, Zhang H D, Zhou S X, et al. Materials Reports, 2024, 38(20), 132(in Chinese). 徐浩, 张浩东, 周双喜, 等. 材料导报, 2024, 38(20), 132. 3 Xu H, Zhang H D, Zhou S X, et al. Railway Standard Design, 2024, 68(11), 60(in Chinese). 徐浩, 张浩东, 周双喜, 等. 铁道标准设计, 2024, 68(11), 60. 4 Li Y, Xie B, Hu S G, et al. China Civil Engineering Journal, 2010, 43(S2), 358(in Chinese). 李悦, 谢冰, 胡曙光, 等. 土木工程学报, 2010, 43(S2), 358. 5 Wang P, Wang B, Xu H. Journal of Railway Engineering Society, 2015, 32(7), 29(in Chinese). 王平, 王彪, 徐浩. 铁道工程学报, 2015, 32(7), 29. 6 Niu D Y, Chen H X, Ren Q L Z, et al. Journal of Hefei University of Technology(Natural Science), 2018, 41(7), 943(in Chinese). 牛冬瑜, 陈华鑫, 仁乾龙珠, 等. 合肥工业大学学报(自然科学版), 2018, 41(7), 943. 7 Sun H J. Research on damage characteristicsand mechanism of emulsified asphaltcement mortar under freeze-thaweffects. Master’s Thesis, Harbin Institute of Technology, China, 2020(in Chinese). 孙海蛟. 乳化沥青水泥砂浆冻融损伤特性及机理研究. 硕士学位论文, 哈尔滨工业大学, 2020. 8 Guo Y C, Shen A Q, He T Q, et al. Journal of Traffic and Transportation Engineering, 2016, 16(5), 9(in Chinese). 郭寅川, 申爱琴, 何天钦, 等. 交通运输工程学报, 2016, 16(5), 9. 9 Sun W, Zhang Y M, Yan H D, et al. Cement and Concrete Research, 1999, 29(9), 1519. 10 Xu Y, Yuan Q, Schutter G D, et al. Construction and Building Materials, 2024, 436, 13. 11 Kou J L, Zhang Y R, Zhang J. Journal of Natural Disasters, 2019, 28(5), 11(in Chinese). 寇佳亮, 张亚茹, 张晶. 自然灾害学报, 2019, 28(5), 11. 12 Lu J Z, Tian L Z, Tong L Q, et al. Journal of Basic Science and Engineering, 2018, 26(5), 12(in Chinese). 逯静洲, 田立宗, 童立强, 等. 应用基础与工程科学学报, 2018, 26(5), 12. 13 Lu J, Zhu K, Tian L, et al. Construction and Building Materials, 2017, 152, 847. 14 Zhang N. Experimental study on the damage characteristics of concrete under the multiple interactions of fatigue loading and freezing-thawing cycles. Master’s Thesis, Yantai University, China, 2018(in Chinese). 张楠. 疲劳荷载与冻融循环多次交互作用下混凝土损伤特性试验研究. 硕士学位论文, 烟台大学, 2018. 15 Science and Technology Department of the Ministry of Railways. Provisional technical conditions for cement emulsified asphalt mortar for CRTS II type plate-type ballastless track of passenger dedicated line railway, China Railway Publishing House, China, 2014(in Chinese). 铁道部科技技术司. 客运专线铁路CRTSII型板式无砟轨道水泥乳化沥青砂浆暂行技术条件, 中国铁道出版社, 2008. 16 Yang J L. Mechanical properties and fine structure of CA mortar under temperature cycling. Master’s Thesis, Southwest Jiaotong University, China, 2019(in Chinese). 杨吉龙. 温度循环下CA砂浆力学特性与细观结构研究. 硕士学位论文, 西南交通大学, 2019. 17 Huang X Q, Zhang T F, Wang X P, et al. Journal of China Three Gorges University(Natural Sciences), 2022, 44(6), 58(in Chinese). 黄小晴, 张庭风, 王小平, 等. 三峡大学学报(自然科学版), 2022, 44(6), 58. 18 Hua L M. Research on microstructure and durability of cement-emulsified asphalt mortar. Master’s Thesis, Yangzhou University, China, 2023(in Chinese). 花良茂. 水泥乳化沥青砂浆微结构及耐久性研究. 硕士学位论文, 扬州大学, 2023. 19 Yang K N. Study on the mechanical properties and durability evolution of cement emulsified bituminous mortar for CRTS-I type slab ballastless tracks. Master’s Thesis, Beijing University of Civil Engineering and Architecture, China, 2022(in Chinese). 杨柯楠. CRTS-Ⅰ型板式无砟轨道水泥乳化沥青砂浆力学性能与耐久性演变微观机理研究. 硕士学位论文, 北京建筑大学, 2022.
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2026, Vol. 40 
