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Experimental study on in-situ mesh fabrication for reinforcing 3D-printed concrete
Automation in Construction ( IF 9.6 ) Pub Date : 2024-12-18 , DOI: 10.1016/j.autcon.2024.105923
Xiangpeng Cao, Shuoli Wu, Hongzhi Cui

The lack of reinforcements persisted as a significant issue in 3D-printed concrete, particularly concerning the continuous vertical reinforcement along the direction of mortar stacking. This paper introduced an in-situ mesh fabrication technique that involved injecting high-flowability material to connect reinforcement segments, resulting in a reinforcing mesh within the stacked mortar. Parallel and interwoven reinforcing steel fibers were inserted and epoxy-coated in-situ within the cast and 3D-printed beams for flexural experiments and interfacial characterizations. The in-situ fabricated mesh exhibited more significant enhancement than the parallel independent reinforcements, both in the horizontal and vertical directions, achieving a maximum flexural enhancement of 123.6 % by an epoxy-coated steel fiber mesh. The high-flowability epoxy healed the gaps inside the concrete caused by the mesh fabrication. This paper provides experimental validation for the feasibility of reinforcement integration in all directions within the final 3D-printed concrete structure, thereby supporting the practical application of 3D printing technology.

中文翻译:


用于加固 3D 打印混凝土的原位网格制造实验研究



缺乏加固一直是 3D 打印混凝土中的一个重要问题,尤其是沿砂浆堆放方向的连续垂直加固。本文介绍了一种原位网格制造技术,该技术涉及注入高流动性材料以连接加固段,从而在堆叠砂浆内产生增强网格。在铸造和 3D 打印梁中插入平行和交织的增强钢纤维并原位涂上环氧树脂涂层,用于弯曲实验和界面表征。在水平和垂直方向上,原位预制网的增强比平行独立钢筋更显着,环氧树脂涂层钢纤维网实现了 123.6% 的最大弯曲增强。高流动性环氧树脂可以修复由网状结构造成的混凝土内部缝隙。本文为最终 3D 打印混凝土结构中各个方向钢筋集成的可行性提供了实验验证,从而支持 3D 打印技术的实际应用。
更新日期:2024-12-18
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