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Frontiers of Structural and Civil Engineering

ISSN 2095-2430

ISSN 2095-2449(Online)

CN 10-1023/X

邮发代号 80-968

2019 Impact Factor: 1.68

Frontiers of Structural and Civil Engineering  2024, Vol. 18 Issue (7): 963-976   https://doi.org/10.1007/s11709-024-1080-4
  本期目录
Geometric quality evaluation of three-dimensional printable concrete using computational fluid dynamics
Weijiu CUI1,2,3, Haijun SUN4, Jiangang ZHOU5, Sheng WANG6, Xinyu SHI7, Yaxin TAO8,9()
1. Department of Civil Engineering, Qingdao University of Technology, Qingdao 266000, China
2. Innovation Institute for Sustainable Maritime Architecture Research and Technology, Qingdao University of Technology, Qingdao 266000, China
3. Intelligent Construction Lab, Qingdao University of Technology, Qingdao 266000, China
4. Shandong Zhaojin Industrial Development Co., Ltd., Yantai 264000, China
5. Architectural Engineering Institute, Weifang Engineering Vocational College, Weifang 261000, China
6. Qingjian Group Co., Ltd., Qingdao 266000, China
7. College of Architecture and Urban Planning, Qingdao University of Technology, Qingdao 266000, China
8. Department of Structural Engineering and Building Materials, Ghent University, Ghent 9000, Belgium
9. Institute of Building Materials, ETH Zurich, Zurich 8064, Switzerland
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Abstract

The importance of geometrical control of three dimensional (3D) printable concrete without the support of formwork is widely acknowledged. In this study, a numerical model based on computational fluid dynamics was developed to evaluate the geometrical quality of a 3D printed layer. The numerical results were compared, using image analysis, with physical cross-sectional sawn samples. The influence of printing parameters (printing speed, nozzle height, and nozzle diameter) and the rheological behavior of printed materials (yield stress), on the geometrical quality of one printed layer was investigated. In addition, the yield zone of the printed layer was analyzed, giving insights on the critical factors for geometrical control in 3D concrete printing. Results indicated that the developed model can precisely describe the extrusion process, as well as the cross-sectional quality.

Key wordsdigital fabrication    3D concrete printing    geometric quality    computational fluid dynamics    printing parameters    yield stress
收稿日期: 2023-06-04      出版日期: 2024-08-06
Corresponding Author(s): Yaxin TAO   
 引用本文:   
. [J]. Frontiers of Structural and Civil Engineering, 2024, 18(7): 963-976.
Weijiu CUI, Haijun SUN, Jiangang ZHOU, Sheng WANG, Xinyu SHI, Yaxin TAO. Geometric quality evaluation of three-dimensional printable concrete using computational fluid dynamics. Front. Struct. Civ. Eng., 2024, 18(7): 963-976.
 链接本文:  
https://academic.hep.com.cn/fsce/CN/10.1007/s11709-024-1080-4
https://academic.hep.com.cn/fsce/CN/Y2024/V18/I7/963
Composition Mass ratio (%)
CaO 64.70
SiO2 20.40
Al2O3 4.70
Fe2O3 3.38
MgO 0.87
Na2O 0.33
K2O 0.49
SO3 1.89
LOI 0.24
Tab.1  
Fig.1  
Fig.2  
Fig.3  
Fig.4  
Parameter Numerical value
Printing speed (mm/s) 10, 20, 30, 40
Nozzle height (mm) 5, 6, 7.5, 10, 12.5, 15, 20
Nozzle diameter (mm) 10, 15, 20, 25, 30
Yield stress (Pa) 250, 405.7, 550, 700, 850, 1000
Consistency index 74.07
Power index 0.81
Tab.2  
Fig.5  
Fig.6  
Fig.7  
Fig.8  
Fig.9  
Fig.10  
Fig.11  
Fig.12  
Fig.13  
Fig.14  
Fig.15  
Fig.16  
Fig.17  
Fig.18  
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