Abstract: Compared to rigid fibers, PVA fibers have a finer diameter and a more complex distribution in concrete. Two modeling methods were used to establish a microscopic model of PVA fiber reinforced recycled concrete (FFF-BAC). Model 1 (M1): considering the combination of cement mortar matrix and PVA fiber as a special engineering cement-based composite material (S-ECC), and combined with brick aggregate (BA) and interface transition zone (ITZ) to form FFF-BAC. Model 2 (M2): FFF-BAC is considered as a four phase material composed of cement mortar, fiber, BA, and ITZ. M1 and M2 were established respectively, and compared with the uniaxial compressive strength test results of flexible fiber reinforced brick aggregate recycled concrete (FFF-BAC), to verify the accuracy of the two models. The results indicate that the M1 simulation is more consistent with the experimental results, with a maximum error of 11.0% for each parameter. The damage and failure process of FFF-BAC was studied, and the effect of BA content on compressive strength was predicted based on M1. The failure modes of different sizes of FFF-BAC were explored. Combining Bazant's size effect formula, a size effect formula for FFF-BAC considering BA content was established.
1 Wang L, He T, Zhou Y, et al. Construction and Building Materials, 2021, 282, 122706. 2 Ji Y, Zhang H, Li W. Case Studies in Construction Materials, 2022, 17, e01240. 3 Yao Z, Duan D, Dang F, et al. Journal of Xi'an University of Technology, 2018(4), 475 (in Chinese). 姚泽良, 段东旭, 党发宁, 等. 西安理工大学学报, 2018(4), 475. 4 Liang N, Zhou K, Lan F, et al. Materials Reports, 2023, 37(11), 104(in Chinese). 梁宁慧, 周侃, 兰菲, 等. 材料导报, 2023, 37(11), 104. 5 Bi J, Zhao Y, Bao C, et al. Journal of Hunan University (Natural Sciences), 2021(3), 99 (in Chinese). 毕继红, 赵云, 鲍春, 等. 湖南大学学报(自然科学版), 2021(3), 99. 6 Sun X, Gao Z, Cao P, et al. Construction and Building Materials, 2019, 202, 58. 7 Zhang J, Wu Z, Yu H, et al. Engineering, 2022, 16, 220. 8 Yu J, Zhang B, Chen W, et al. Construction and Building Materials, 2020, 260, 120444. 9 Zhang L, Yu Z, Shen L, et al. New Building Materials, 2019, 46(3), 18 (in Chinese). 张丽, 余振鹏, 沈丽, 等. 新型建筑材料, 2019, 46(3), 18. 10 Su J, Zhu J, Shi C, et al. Journal of Hunan University (Natural Sciences), 2022, 49(5), 174 (in Chinese). 苏捷, 朱君, 史才军, 等. 湖南大学学报(自然科学版), 2022, 49(5), 174. 11 Chen Y. Fiber pull-out test and macroscopic mechanical properties of fiber reinforced cement-based. Master's Thesis, Hefei University of Technology, China, 2019 (in Chinese). 陈亚迪. 纤维拔出试验及纤维增强水泥基材料宏观力学性能研究. 硕士学位论文, 合肥工业大学, 2019. 12 Said A, Elsayed M, et al. Case Studies in Construction Materials, 2022, 16, e01009. 13 Zhu J, Li Z, Wang X, et al. Chinese Journal of Basic Science and Engineering, 2021, 29(2), 471 (in Chinese). 朱俊涛, 李志强, 王新玲, 等. 应用基础与工程科学学报, 2021, 29(2), 471. 14 Li K, Yu P, Liu W, et al. Industrial Architecture, 2020, 50(3), 172 (in Chinese). 李可, 喻鹏, 刘伟康, 等. 工业建筑, 2020, 50(3), 172. 15 Zhou J, Pan J, Leung C K Y. Journal of Materials in Civil Engineering, 2015, 27(1), 04014111. 16 Li H. Experimental research on ultra high toughness cementitious composites. Master's Thesis, Dalian University of Technology, China, 2009 (in Chinese). 李贺东. 超高韧性水泥基复合材料试验研究. 硕士学位论文, 大连理工大学, 2009. 17 Zheng Y, Zhuo J, Zhang P, et al. Journal of Cleaner Production, 2022, 370, 133555. 18 Abbas A, Fathifazl G, Fournier B, et al. Materials Characterization, 2009, 60(7), 716. 19 Kim H K, Lim Y, Tafesse M, et al. Construction and Building Materials, 2022, 317, 125840. 20 Mathew A A, Saibabu S, Mohan V, et al. In:Proceedings of SECON 2020: Structural Engineering and Construction Management 4. Springer International Publishing, 2021, pp. 883. 21 Jayasuriya A, Adams M P, Bandelt M J. Journal of Materials in Civil Engineering, 2020, 32(4), 04020044. 22 Xiong W, Tan S, Peng D, et al. Journal of Architecture and Civil Engineering, 2024, 41(1), 181 (in Chinese). 熊汪, 覃书豪, 彭定东, 等. 建筑科学与工程学报, 2024, 41(1), 181. 23 Jin L, Yang W, Yu W, et al. Engineering Mechanics, 2020, 37(3), 56 (in Chinese). 金浏, 杨旺贤, 余文轩, 等. 工程力学, 2020, 37(3), 56. 24 Bažant Z P, Caner F C, Adley M D, et al. Journal of Engineering Mechanics, 2000, 126(9), 962.
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2025, Vol. 39 
