冻融后硫铝酸盐陶粒混凝土动态压缩力学性能研究
PDF下载 (203)李 哲,李萌萌,薛 文,陈江瑛.冻融后硫铝酸盐陶粒混凝土动态压缩力学性能研究[J].宁波大学学报(理工版),2025,38(2):94-101.DOI:10.20098/j.cnki.1001-5132.2024.0122
LI Zhe,LI Mengmeng,XUE Wen,CHEN Jiangying.Study on dynamic mechanical properties of sulphoaluminate ceramsite concrete after freeze-thaw cycle[J].Journal of Ningbo University(Natural Science & Engineering Edition),2025,38(2):94-101.DOI:10.20098/j.cnki.1001-5132.2024.0122
| Title: | 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 |
| Author(s): | LI Zhe, LI Mengmeng, XUE Wen, CHEN Jiangying |
| 关键词: | 陶粒混凝土; 冻融循环; 细观损伤; 数值模拟 |
| Keywords: | ceramsite concrete; freeze-thaw cycle; microscopic damage; numerical simulation |
| 分类号: | TU528 |
| DOI: | 10.20098/j.cnki.1001-5132.2024.0122 |
| 文献标识码: | A |
| 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. |
| Abstract: | 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. |
| 参考文献 /References: | [1] KARACA Z, DURMUS A. Investigation of usability of lightweight concrete produced with natural eastern black sea aggregates in reinforced concrete beams[J]. Journal of Materials in Civil Engineering, 2012, 24(7):937-943. [2] WONGKVANKLOM A, POSI P, KHOTSOPHA B, et al. Structural lightweight concrete containing recycled lightweight concrete aggregate[J]. KSCE Journal of Civil Engineering, 2018, 22(8):3077-3084. [3] FARAHANI J N, SHAFIGH P, ALSUBARI B, et al. Engineering properties of lightweight aggregate concrete containing binary and ternary blended cement[J]. Journal of Cleaner Production, 2017, 149:976-988. [4] POWERS T C, HELMUTH R A. Theory of volume changes in hardened portland cement paste during freezing[J]. Highway Research Board Proceeding, 1953, 32:285-297. [5] PENTTALA V, AL-NESHAWY F. Stress and strain state of concrete during freezing and thawing cycles[J]. Cement and Concrete Research, 2002, 32(9):1407-1420. [6] YANG Y J, ZHU H Z, CHEN D G. Influence of the coarse aggregates size on the frost resistance in normal and polycarboxylate mixed concrete[J]. Journal of Building Engineering, 2023, 76:107031. [7] VELARDO P, SÁEZ DEL BOSQUE I F, SÁNCHEZ DE ROJAS M I, et al. Durability of concrete bearing polymer-treated mixed recycled aggregate[J]. Construction and Building Materials, 2022, 315:125781. [8] 满晨, 邱继生, 袁琳. 冻融劣化作用下煤矸石陶粒混凝土力学性能衰变规律研究[J]. 混凝土, 2023(4):74-77. [9] 袁立月, 陈克政, 彭飞, 等. 冻融循环作用下陶粒混凝土抗压性能研究[J]. 黑龙江大学工程学报(中英俄文), 2023, 14(4):81-87. [10] 肖圣哲, 王腾, 陈江瑛. 冻融循环温度对陶粒混凝土动态抗压性能的影响[J]. 硅酸盐通报, 2018, 37(12):3935- 3938. [11] HUANG Y C, LI Z, CHEN J Y, et al. Stress overshoot and its evolution of ceramsite concrete with freeze-thaw cycles under impact loading[J]. Engineering Fracture Mechanics, 2024, 297:109874 [12] HUANG Y J, NATARAJAN S, ZHANG H, et al. A CT image-driven computational framework for investigating complex 3D fracture in mesoscale concrete[J]. Cement and Concrete Composites, 2023, 143:105270. [13] ZHOU R X, SONG Z H, LU Y. 3D mesoscale finite element modelling of concrete[J]. Computers and Structures, 2017, 192:96-113. [14] LI C Z, SONG X B. Mesoscale modeling of chloride transport in unsaturated concrete based on Voronoi tessellation[J]. Cement and Concrete Research, 2022, 161: 106932. [15] MA H Y, YUE C J, YU H F, et al. Experimental study and numerical simulation of impact compression mechanical properties of high strength coral aggregate seawater concrete[J]. International Journal of Impact Engineering, 2020, 137:103466. [16] WANG Z Y, HOU C C, GUO Q Q. Numerical simulation on the dynamic response of bonded unidirectional prestressed concrete slabs subjected to low-velocity impact[J]. Structures, 2022, 38:1098-1110 [17] 秦晓川. 混凝土及预应力混凝土冻融机理及耐久性评估研究[D]. 南京: 东南大学, 2017. [18] 王甲, 肖圣哲, 邱欣, 等. 陶粒混凝土冲击损伤演化的三维数值模拟[J]. 宁波大学学报(理工版), 2017, 30(6): 59-65. |
| 备注/Memo: | 收稿日期: 2024−01−17. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 宁波市重点研发计划项目（2022Z209）; 国家自然科学基金（11572163, 11832013）. 第一作者: 李哲, 硕士研究生, 主要研究方向: 混凝土动态力学力学性能. E-mail: 2111081009@nbu.edu.cn *通信作者: 陈江瑛, 博士/教授, 主要研究方向: 冲击动力学. E-mail: chenjiangying@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
