协同连续布筋增韧喷射3D打印混凝土的抗弯性能

doi:10.11896/cldb.22090102

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Abstract The distance between the spray nozzle and the print substrate can effectively solve the co-construction problem of 3D printing and reinforcement. In this work, a design method of spray-based 3D printed micro-cable reinforced concrete was proposed based on the collaborative continuous reinforcement and sprayed-based 3D printing concrete technologies. The effects of different reinforcement diameter (0.6, 0.8, 1.0 mm) and number (1—4) on the flexural performance of spray-based 3D printed micro-cable reinforced concrete were comprehensively studied. The test results show that the micro-cable can significantly improve the flexural strength and ductility of the printed concrete. Compared with the unreinforced group (D0 sample), the flexural strength and displacement of the printed micro-cable reinforced concrete are enhanced by 800% and 2 076.47%, respectively. In addition, based on the high-speed spraying pressure and layer-by-layer printing characteristics of spray-based 3D printing, the interface between the micro-cable and concrete is bonded firmly and compactly, which further ensures the flexural performance and structural integrity of spray-based 3D printed micro-cable concrete. To verify the practicability of the spray-based 3D printed micro-cable reinforced concrete system, a special-shaped torch structure with the size of 1 300 mm (Z)×800 mm (X)×86 mm (Y) is printed, which provides a certain reference for the preparation and application of 3D printed reinforced concrete structures in large scale.

Key words： spray-based 3D printing continuous micro-cable reinforcement flexural behavior ductility

Published: Online: 2024-01-16

CLC number:

TU512.4

Fund:National Natural Science Foundation of China (52278252,51908182,52108205) and Natural Science Foundation of Hebei Province (E2020202043,E2022202041,D2020202008).

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	Articles by authors
	LIU Xiongfei
	HOU Guanyu
	CAI Huachong
	LI Zhijian

Cite this article:

LIU Xiongfei,HOU Guanyu,CAI Huachong, et al. Flexural Performance of Spray-based 3D Printed Concrete with Continuous Micro-cable[J]. Materials Reports, 2024, 38(1): 22090102-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22090102 OR http://www.mater-rep.com/EN/Y2024/V38/I1/22090102

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