冻融后硫铝酸盐陶粒混凝土动态压缩力学性能研究  

Study on dynamic mechanical properties of sulphoaluminate ceramsite concrete after freeze-thaw cycle

作　　者：李哲 李萌萌 薛文 陈江瑛[1,2,3] LI Zhe;LI Mengmeng;XUE Wen;CHEN Jiangying(Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and Pipeline,Ningbo University,Ningbo 315211,China;Key Laboratory of Impact and Safety Engineering of Ministry of Education,Ningbo University,Ningbo 315211,China;Faculty of Mechanical Engineering&Mechanics,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学压力容器与管道安全浙江省工程研究中心,浙江宁波315211 [2]宁波大学冲击与安全工程教育部重点实验室,浙江宁波315211 [3]宁波大学机械工程与力学学院,浙江宁波315211

出　　处：《宁波大学学报(理工版)》2025年第2期94-101,共8页Journal of Ningbo University:Natural Science and Engineering Edition

基　　金：宁波市重点研发计划项目(2022Z209);国家自然科学基金(11572163,11832013).

摘　　要：硫铝酸盐水泥具有快凝早强特点,是冬季施工、抢修和抢建工程的首选水泥用料,由此对陶粒体积分数为40%的硫铝酸盐陶粒混凝土受冻融循环影响的动态力学性能进行研究.结果表明,冻融循环周次增加或其最低温度降低都会使材料的抗压强度下降.动态试验的数值模拟表明,未冻融硫铝酸盐陶粒混凝土试样的应力―应变曲线和破坏形态与试验结果吻合较好.动态压缩试验的细观仿真结果显示,陶粒混凝土中骨料与基体的界面过渡区是其内部结构的薄弱环节,在动态压缩过程中容易形成裂纹.Sulphoaluminate concrete has the characteristics of fast setting and early strength,and is the first choice of cement materials for winter construction,emergency repair and emergency construction projects.The dynamic mechanical properties of sulphoaluminate concrete with 40%ceramsite volume fraction under freeze-thaw cycle are studied.The experimental results show that the compressive strength of the material decreases with the increase of freeze-thaw cycles or the decrease of the minimum temperature of freeze-thaw cycle.The numerical simulation of dynamic test demonstrates that the stress-strain curves and failure patterns of unfrozen sulphoaluminate ceramsite concrete are in good agreement with the experimental results.The meso-simulation results of dynamic compression test show that the interfacial transition zone between ceramsite and matrix in ceramsite concrete is the weak link in its internal structure,and cracks are easily formed in the process of dynamic compression.

关 键 词：陶粒混凝土 冻融循环 细观损伤 数值模拟 

分 类 号：TU528[建筑科学—建筑技术科学]