Barbed-wire reinforcement for 3D concrete printing

Hojati, Maryam; Memari, Ali M.; Zahabi, Mehrzad; Wu, Zhengyu; Li, Zhanzhao; Park, Keunhyoung; Nazarian, Shadi; Duarte, J.P.

doi:10.1016/j.autcon.2022.104438

Cited by 24 publications

(6 citation statements)

References 32 publications

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“…Still, there is a need for testing elements printed using the technique on a larger scale and curved elements. There is also a need to develop a system for minimizing the lap length by exploring ways to stitch the reinforcement meshes Hojati et al (2022) found that the usage of barbed wires enhanced the bond strength, flexural strength, and moment carrying capacity compared with plain concrete elements, but maintaining the straightness of the barbed wire is challenging and it hinders the automation level of this method of reinforcement. Wang et al (2021) studied the usage of U-shaped nails as reinforcement for concrete 3DP elements yielding favorable results.…”

Section: Meshes Barbed Wires and U-nailsmentioning

confidence: 99%

“…It was found that the peak loads increased by 59.2%-173.3%, and the deflection capacity increased by more than 11 times more than the nonreinforced ones. Hojati et al (2022) explored the usage of barbed wires and fencing wires with thorn-like projections as a reinforcement for 3D-printed concrete elements to increase their tensile and flexural capacity. The barbed wires are manually placed along the 3D-printed filaments, and the specimens are tested to get the required results.…”

Section: Mesh and Barbed Wirementioning

confidence: 99%

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A review of concrete 3D printed structural members

Raphael

Senthilnathan

Patel

et al. 2023

Front. Built Environ.

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Concrete 3D Printing (3DP) is a potential technology for increasing automation and introducing digital fabrication in the construction industry. Concrete 3D Printing provides a significant advantage over conventional or precast methods, such as the prospects of topologically optimized designs and integrating functional components within the structural volume of the building components. Many previous studies have compiled state-of-art studies in design parameters, mix properties, robotic technologies, and reinforcement strategies in 3D printed elements. However, there is no literature review on using concrete 3D Printing technology to fabricate structural load-carrying elements and systems. As concrete 3DP is shifting towards a large-scale construction technology paradigm, it is essential to understand the current studies on structural members and focus on future studies to improve further. A systematic literature review process is adopted in this study, where relevant publications are searched and analyzed to answer a set of well-defined research questions. The review is structured by categorizing the publications based on issues/problems associated with structural members and the recent technology solutions developed. It gives an overall view of the studies, which is still in its nascent stage, and the areas which require future focus on 3D printing technology in large-scale construction projects.

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Section: Meshes Barbed Wires and U-nailsmentioning

confidence: 99%

Section: Mesh and Barbed Wirementioning

confidence: 99%

A review of concrete 3D printed structural members

Raphael

Senthilnathan

Patel

et al. 2023

Front. Built Environ.

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“…In-process (in-line) reinforcement is an interesting possibility for integrating reinforcement during the layer-by-layer deposition process. It can be achieved by adding continuous reinforcement such as entrained cables, barbs, and tapes [18][19][20][21]. Furthermore, it can also be achieved by using discrete reinforcing elements such as fibers that can be premixed with the printing materials [22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Automated Reinforcement during Large-Scale Additive Manufacturing: Structural Assessment of a Dual Approach

Ahmed,

Giwa,

Game

et al. 2024

Buildings

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Automated and seamless integration of reinforcement is one of the main unresolved challenges in large-scale additive construction. This study leverages a dual-reinforcement solution consisting of high-dosage steel fiber (up to 2.5% by volume) and short vertical reinforcements as a complementary reinforcement technique for 3D-printed elements. The mechanical performance of the printing material was characterized by measuring the compressive, flexural, and uniaxial tensile strengths of mold-cast specimens. Furthermore, the flexural performance of the plain and fiber-reinforced 3D-printed beams was evaluated in the three main loading directions (X, Y, and Z-directions in-plane). In addition, short vertical threaded reinforcements were inserted into the fiber-reinforced 3D-printed beams tested in the Z-direction. The experimental results revealed the superior flexural performance of the fiber-reinforced beams loaded in the longitudinal directions (X and Y). Moreover, the threaded reinforcement significantly increases the flexural strength and ductility of beams loaded along the interface, compared to the control. Overall, the proposed dual-reinforcement approach, which exhibited notably less porosity compared to the mold-cast counterpart, holds great potential as a reinforcement solution for 3D-printed structures without the need for manual operations.

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“…Also, another one of their most important applications in the foundation is the implementation of rabbits to prevent construction joints in concrete 8 . To reinforce the concrete in the structures, the rebars are connected with wire, so that the anchor system is firmly placed in the concrete 9 , 10 .…”

Section: Introductionmentioning

confidence: 99%

Achieving outstanding mechanical/bonding performances by epoxy nanocomposite as concrete–steel rebar adhesive using silane modification of nano SiO2

Ghamarpoor

Jamshidi

Mohammadpour

2023

Sci Rep

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Anchoring steel rebar in concrete structures is a common method in the building and construction industry. This research focuses on improving the mechanical/bonding properties of the prepared epoxy nanocomposite adhesive using surface treatment of SiO2 nano fillers by glycidoxypropyltrimethoxysilane (GPTMS). For this purpose, the nano silica particles were silanized via a facile sol–gel method at silane concentrations of 1, 5, 10 and 20X (i.e. X is stoichiometric silane concentration). The nanoparticles were characterized carefully by FTIR, TGA, XRD and XPS techniques. It was found that the highest GPTMS grafting ratio was obtained at silane concentration of 10X. The pure and silanized nanoparticles were added to a two-pack epoxy resin and were compared for tensile and compressive properties. It was found that surface modification of nano silica caused improvement in the strength, modulus, compressive strength and compressive modulus by 56, 81, 200 and 66% compared to the pristine epoxy adhesive and also 70, 20, 17 and 21% compared to the pure nano silica containing adhesive. It also caused 40 and 25% improvement in the pullout strength, 33 and 18% enhancement in the pullout displacement and 130 and 50% in adhesion energy compared to the pristine and raw silica-containing adhesives, respectively.

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Barbed-wire reinforcement for 3D concrete printing

Cited by 24 publications

References 32 publications

A review of concrete 3D printed structural members

A review of concrete 3D printed structural members

Automated Reinforcement during Large-Scale Additive Manufacturing: Structural Assessment of a Dual Approach

Achieving outstanding mechanical/bonding performances by epoxy nanocomposite as concrete–steel rebar adhesive using silane modification of nano SiO2

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