基于打印参数影响的3D打印混凝土力学性能试验研究

doi:10.11896/cldb.21110276

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Abstract The experiment prepared 3D printed concrete with better workability. The influence of two printing parameters of printhead size and printing path on the compressive strength, flexural strength, micro and meso structure of the specimen were studied, and the failure mechanism of its stress cracking was analyzed. The compressive strength prediction model was proposed based on the pore structure parameters. The results showed that as the size of the printhead increased from 20 mm to 40 mm, the constructability of 3D printed concrete was enhanced, the mechanical strength of the printed specimen was increased by 7.5%—31.6%, the porosity and the number of defects were decreased. The porosity of the printed specimen of the orthogonal path B was similar to that of the parallel path A, but its mechanical strength was increased by 10.8%—46.7%. The weakest surface of 3D printed concrete was the interface between the printed layers. When the printed specimen was cracked and damaged, there were three types of failure modes. The compressive strength prediction model for 3D printed concrete was established to provide a theoretical reference for evaluating the compressive strength of 3D printed concrete under different printing parameters.

Key words： 3D printed concrete printed parameter mechanical strength porosity failure mechanism

Published: 10 January 2023 Online: 2023-01-31

CLC number:

TU528.45

Fund:Thirteenth Five-Year National Key Research and Development Plan(2019YFC1907105), the National Natural Science Foundation of China(51878546, 52178251), the Shaanxi Provincial Outstanding Youth Science Fund Project(2020JC-46), the Key Research and Development Projects of Shaanxi Province(2020SF-392), the Yulin City Industry-University-Research Science and Technology Plan Project(CXY-2020-062) and the Innovative Talent Promotion Plan of Shaanxi Province(2018KJXX-056).

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	Articles by authors
	LIU Chao
	WANG Youqiang
	LIU Huawei
	ZHANG Rongfei

Cite this article:

LIU Chao,WANG Youqiang,LIU Huawei, et al. Experimental Study on the Mechanical Properties of 3D Printed Concrete Based on the Influence of Printing Parameters[J]. Materials Reports, 2023, 37(1): 21110276-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21110276 OR http://www.mater-rep.com/EN/Y2023/V37/I1/21110276

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