Abstract: Electromagnetic orientation of steel fibers in ultra-high performance concrete (UHPC) is an effective approach to enhance fiber utilization efficiency and improve the mechanical performance of the material. However, systematic studies on the magnetic steering efficiency of steel fibers in fresh UHPC slurry are still lacking. In this work, X-ray computed tomography (CT) and three-dimensional image reconstruction techniques were employed to capture the spatial distribution of steel fibers within the UHPC matrix. Fiber inclination angles were extracted and quantitatively analyzed. The influence of key parameters—including magnetic field intensity, orientation time, fiber volume fraction, and fiber length—on the fiber alignment efficiency was comprehensively investigated. The results show that magnetic actuation significantly improves the spatial orientation of fibers, with the distribution of inclination angles decreasing exponentially as the magnetic field strength increases. The average inclination angle decreases from 65.2° in naturally cast samples to 28.7° under a 40 mT magnetic field. Additionally, the orientation efficiency improves markedly within the first 30 seconds of magnetic exposure but gradually saturated with further time extension. Fiber volume fraction and length also affects alignment performance;lower volume fractions yield better orientation, while fiber length has a relatively minor influence. The fitting formulas established in this work provide theoretical support for the design and performance prediction of fiber orientation in practical engineering applications.
熊永明, 李凯, 王力东, 韩艳. 新拌UHPC浆体中钢纤维磁控转向效率研究[J]. 材料导报, 2026, 40(10): 25060012-7.
XIONG Yongming, LI Kai, WANG Lidong, HAN Yan. Study on the Efficiency of Steel Fiber Reorientation in Fresh UHPC Paste Using Electromagnetic Field. Materials Reports, 2026, 40(10): 25060012-7.
1 Shao X D, Fan W, Huang Z Y. China Civil Engineering Journal, 2021, 54(1), 1(in Chinese). 邵旭东, 樊伟, 黄政宇. 土木工程学报, 2021, 54(1), 1. 2 Ou Z J, Liu Z H, Cao L, et al. Bridge Construction, 2025, 55(2), 50(in Chinese). 欧智菁, 柳子鸿, 曹磊, 等. 桥梁建设, 2025, 55(2), 50. 3 Qin Z G, Du J L, Wu T, et al. Engineering Mechanics, 2025, 27(5), 1(in Chinese). 秦朝刚, 杜锦霖, 吴涛. 工程力学, 2025, 27(5), 1. 4 Du C, Song S, Gao Q H, et al. Protective Engineering, 2024, 46(2), 45(in Chinese). 杜闯, 宋帅, 高启辉, 等. 防护工程, 2024, 46(2), 45. 5 Mu R, Wang J J, Qing L B, et al. Journal of Southeast University (Na-tural Science Edition), 2024, 54(2), 294(in Chinese). 慕儒, 王晶晶, 卿龙邦, 等. 东南大学学报(自然科学版), 2024, 54(2), 294. 6 Liu B, Li P, Qi J, et al. Construction and Building Materials, 2024, 456, 139301. 7 Ahmad I, Qing L, Khan S, et al. Construction and Building Materials, 2021, 284, 122680. 8 Qiu M H, Zhang Y, Qu S Q, et al. Construction and Building Materials, 2020, 256, 119311. 9 Huang H H, Teng L, Gao X J, et al. Materials Reports, 2024, 38(24), 140(in Chinese). 黄煌煌, 滕乐, 高小建, 等. 材料导报, 2024, 38(24), 140. 10 Hambach M, Volkmer D. Cement and Concrete Composites, 2017, 79, 62. 11 Mu R, Qiu X, Zhao Q M, et al. Journal of Building Materials, 2015, 18(2), 208(in Chinese). 慕儒, 邱欣, 赵全明, 等. 建筑材料学报, 2015, 18(2), 208. 12 Mu R, Li H, Wang X W, et al. Journal of Building Materials, 2015, 18(3), 387(in Chinese). 慕儒, 李辉, 王晓伟, 等. 建筑材料学报, 2015, 18(3), 387. 13 Alberti M G, Enfedaque A, Gálvez J C. Cement and Concrete Compo-sites, 2017, 77, 29. 14 Abrishambaf A, Pimentel M, Nunes S. Cement and Concrete Research, 2017, 97, 28. 15 Xiong Y, Yang M, Zhou Y, et al. Construction and Building Materials, 2024, 452, 139010. 16 Xiong Y, Yang M, Zhang Y, et al. Cement and Concrete Composites, 2023, 143, 105251. 17 Xiong Y, Yang M, Yuan Y, et al. Journal of Building Engineering, 2024, 94, 109854. 18 Li L. Research on rotation law anddirection control of steel fiberin freshly mixed cement-based material. Master's Thesis, Hebei University of Technology, 2023 (in Chinese). 李露. 钢纤维在新拌水泥基材料中的转动规律与方向控制研究. 硕士学位论文, 河北工业大学, 2023. 19 Chen Z Y, Kou Z H, Xiong Y M, et al. Bulletin of the Chinese Ceramic Society, 2024, 43(7), 2346 (in Chinese). 陈卓异, 寇子豪, 熊永明, 等. 硅酸盐通报, 2024, 43(7), 2346. 20 Zheng Y, Zhou Y, Huang X, et al. Construction and Building Materials, 2022, 327, 126823. 21 Zhang Y, Jiang Z, Zhu Y, et al. Construction and Building Materials, 2021, 267, 120551. 22 Standards Press of China. Technical requirements for ultra high perfor-mance concrete (UHPC):T/CECS 10107-2020, Standards Press of China, China, 2020(in Chinese). 中国工程建设标准化协会. 超高性能混凝土(UHPC)技术要求:T/CECS 10107-2020, 中国标准出版社, 2020. 23 Ministry of Industry and Information Technology of the People’s Republic of China. Cementitious self-Levelling compound for floor:JC/T 985-2017, China Construction Material Industry Publishing House, China, 2017 (in Chinese). 中华人民共和国工业和信息化部. 地面用水泥基自流平砂浆: JC/T 985-2017, 中国建材工业出版社, 2017. 24 Liu J, Li C, Liu J, et al. Construction and Building Materials, 2013, 48, 656. 25 González C D, Alonso M Á, Mínguez J, et al. International Journal of Concrete Structures and Materials, 2024, 18(1), 4. 26 Yoo D Y, Banthia N, Kang S T, et al. Composite Structures, 2016, 157, 62.
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2026, Vol. 40 
