3D-printing has been growing in acceptance in the construction industry owing to its transformative potential in concrete materials. One of the main challenges for its further adoption is the integration of reinforcement given the difficulty of incorporating steel rebars and the formation of cold joints between filaments. This study proposes the use of barbed wires, fencing wires with sharp thorn-like projections, as a reinforcing component to improve tensile capacity and bond between printed filaments. Results indicated that incorporating barbed wire into 3D-printed concrete increases overall mechanical performance (e.g., moment capacity and bond strengths up to 363% and 71%, respectively, compared to plain 3D-printed concrete). This improvement can be attributed to the twisting of wires and the unique geometry of the 4-point barbs. The proposed barb-wire reinforcement method demonstrates the feasibility of in-process reinforcing during 3D-printing and can be further advanced to achieve full automation of the printing and reinforcement processes.

由于其在混凝土材料方面的变革潜力，3D 打印在建筑行业的接受度越来越高。考虑到钢筋的结合困难和细丝之间冷接头的形成，进一步采用它的主要挑战之一是钢筋的整合。本研究建议使用带刺铁丝、具有尖锐刺状突起的围栏线作为增强部件，以提高印刷细丝之间的拉伸能力和粘合力。结果表明，在 3D 打印混凝土中加入带刺铁丝网可提高整体机械性能（例如，与普通 3D 打印混凝土相比，抗弯承载力和粘结强度分别高达 363% 和 71%）。这种改进可归因于电线的扭曲和 4 点倒钩的独特几何形状。