Mechanism analysis of the magnetic field assisted 3D printed steel fiber reinforced concrete

被引：0
|
作者：
Huang, Junxiang [1 ,2 ]
Peng, Zeqin [1 ,2 ]
Tan, Xianzhong [1 ,2 ]
Gong, Guofang [1 ,2 ]
Yang, Huayong [1 ,2 ]
Ren, Kai [1 ,2 ]
Han, Dong [1 ,2 ]
机构：
[1] School of Mechanical Engineering, Zhejiang University, Hangzhou,310027, China
[2] State Key Laboratory of Fluid Power and Mechatronic System, Zhejiang University, Hangzhou,310027, China
来源：
Construction and Building Materials | 2025年 / 458卷
基金：
中国国家自然科学基金;
关键词：
Brinell Hardness - Concrete testing - Fiber reinforced concrete - Fiber reinforced plastics - Fibers - Magnetic nozzles;
D O I：
10.1016/j.conbuildmat.2024.139737
中图分类号：
学科分类号：
摘要：
The magnetic orientation of steel fibers in concrete, extensively studied in formwork-cast concrete for improving crack-bridging capacity, has yet to be analyzed for its feasibility in adjusting fiber orientation via magnetic field in 3D printed concrete. This study thus aims to propose a technique for in-situ magnetization of steel fibers and quantitatively investigate fiber magnetic orientation in 3D printed concrete. Relations between critical process parameters and the fiber magnetic orientation were investigated, including magnetic induction intensity, fiber volume fraction, and fiber types. The results reveal that when the magnetic induction intensity at the center of the nozzle reaches 34mT and the fiber volume fraction is 0.5 %, 25 mm bow steel fibers (BF25) exhibit the most significant effect on bridging cracks, with a maximum improvement in mechanical properties of over 50 %. The enhancement of the mechanical properties demonstrates the huge potential of applying fiber magnetic orientation in 3D printed engineering concrete. © 2024 Elsevier Ltd
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