Flexural Performance of Spray-based 3D Printed Concrete with Continuous Micro-cable

被引：0
|
作者：
Liu X. [1 ,2 ]
Hou G. [1 ,2 ]
Cai H. [1 ,2 ]
Li Z. [1 ,2 ]
机构：
[1] School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin
[2] Engineering Research Center on 3D Construction Printing of Hebei, Tianjin
来源：
Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 01期
基金：
中国国家自然科学基金;
关键词：
continuous micro-cable reinforcement; ductility; flexural behavior; spray-based 3D printing;
D O I：
10.11896/cldb.22090102
中图分类号：
学科分类号：
摘要：
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 unrein-forced 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. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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