Steel fiber orientational distribution and effects on 3D printed concrete with coarse aggregate

doi:10.1617/s11527-022-01943-7

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	Steel fiber orientational distribution and effects on 3D printed concrete with coarse aggregate
	Chen, Yidong 1,2; Zhang, Yunsheng 1,2,3; Pang, Bo 4; Wang, Dafu 1,2; Liu, Zhiyong 1,2; Liu, Guojian 5
刊名	Materials and Structures/Materiaux et Constructions
	2022-04-01
卷号	55 期号:3
关键词	3D printers Computerized tomography Concrete aggregates Deep learning Fiber reinforced materials Image segmentation Reinforced concrete Steel fibers Tensile strength 3d concrete printing Coarse aggregates Concrete printings Distribution coefficient Fibre orientation Fresh properties Mechanical performance Orientational distributions Orientational effects Steel fiber reinforced concretes
ISSN号	1359-5997
DOI	10.1617/s11527-022-01943-7
英文摘要	In this study, the first insight into the extrusion-based 3D printed steel fiber reinforced concrete with 5–20 mm coarse aggregate (3DPSFRC) is presented. The fresh properties and mechanical performance of 0%, 1% and 2% fiber content 3DPSFRC were investigated and compared with those of the cast. Through the deep-learning segmentation method, the centerlines of steel fibers in the X-ray micro-computed tomography image sequence are extracted and 3D analyzed. The orientational distribution coefficients were introduced to quantitatively indicate the degree of steel fiber inclination in the printing (θ) and stacking directions (γ) inside the 3DPSFRC. Results indicate that the flowability of 3DPSFRC was decreased due to the presence of steel fibers compared with plain concrete. The enhancement effect of steel fiber on the compressive, flexural, and axial tensile strength (up to 73.24 MPa, 8.71 MPa, and 7.58 MPa, respectively) and post-peak toughness of 3DPSFRC is remarkable. The weakening of orientational distribution coefficients and the partial divergence distribution of steel fibers are related to the presence of coarse aggregate. Further, the anisotropy of 3DPSFRC in the compressive and flexural tests is weakened owing to the changes in the fiber orientational distribution after the steel fiber content increases. © 2022, RILEM.
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	Springer Science and Business Media B.V.
WOS记录号	WOS:000778482900001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157844]
专题	兰州理工大学
作者单位	1.School of Materials Science and Engineering, Southeast University, Nanjing; 211189, China; 2.Collaborative Innovation Center for Advanced Civil Engineering Materials, Nanjing; 211189, China; 3.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 4.Department of Civil Engineering, Qingdao University of Technology, Qingdao; 266033, China; 5.School of Civil Engineering, Suzhou University of Science and Technology, Suzhou; 215011, China
推荐引用方式 GB/T 7714	Chen, Yidong,Zhang, Yunsheng,Pang, Bo,et al. Steel fiber orientational distribution and effects on 3D printed concrete with coarse aggregate[J]. Materials and Structures/Materiaux et Constructions,2022,55(3).
APA	Chen, Yidong,Zhang, Yunsheng,Pang, Bo,Wang, Dafu,Liu, Zhiyong,&Liu, Guojian.(2022).Steel fiber orientational distribution and effects on 3D printed concrete with coarse aggregate.Materials and Structures/Materiaux et Constructions,55(3).
MLA	Chen, Yidong,et al."Steel fiber orientational distribution and effects on 3D printed concrete with coarse aggregate".Materials and Structures/Materiaux et Constructions 55.3(2022).