Effective factors and a prediction method on extrusion flow of 3D printed concrete
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Kai Wu 1
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School of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
 
 
Submission date: 2024-06-04
 
 
Final revision date: 2024-12-23
 
 
Acceptance date: 2025-10-23
 
 
Publication date: 2025-11-20
 
 
Corresponding author
Jianzhong Lai   

School of Material Science and Engineering, Nanjing University of Science and Technology,, China
 
 
Cement Wapno Beton 30(2) 124-143 (2025)
 
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ABSTRACT
The size control of 3D printed concrete filament limits application of 3D printed concrete technology. The accuracy of 3D printed concrete will benefit from stability of extrusion flow. Therefore, it is necessary to study the effective factors on extrusion flow. In this paper, the effects from fluidity and mass of loading in material tank on extrusion flow were discussed. The special phenomenon effective on extrusion flow during the printing process was discovered and named as ‘collapse’ and ‘critical loading’. Meanwhile, the liner relationship between fluidity and extrusion flow per unit mass of initial loading in material tank was observed. A feasible method for extrusion flow prediction was proposed based on mathematical results in this study. And some advices were provided according to the experience from this research.
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ISSN:1425-8129
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