Volume-forming 3D concrete printing using a variable-size square nozzle

Xu, Jie; Ding, Lieyun; Cai, Lixiong; Zhang, Lichao; Luo, Hanbin; Qin, Wenbo

doi:10.1016/j.autcon.2019.03.008

Cited by 66 publications

(32 citation statements)

References 19 publications

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“…Because the distance between each tool-path is variable, the printing parameters are also variable to ensure the complete filling, existing studies [8,9] have shown that the relationship between printing parameters, printing velocity, extrusion velocity and extrusion width, can be regarded as linear, and can be expressed by Eq. 9.…”

Section: ) Calculation Of Printing Parametersmentioning

confidence: 99%

Adaptable Tool-Path Planning Method for 3D Concrete Printing Based on the Mapping Method

Wan

Wang

2021

Proceedings of the 2020 DigitalFUTURES

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Abstract3D concrete printing (3DCP) has been successfully and widely applied in the fields of civil structure, infrastructure, architectural decoration etc.,due to its unique advantages of automation and flexibility, and has shown great potential for development. One of the key steps in the execution of 3DCP is the tool-path planning process. However, 3DCP typically utilize the flowable composite materials which changes with time, and it is easy to induce interface joints or filling defects due to uneven path distribution when constructing the irregular-shaped construction. To solve the problem of printing path planning in 3DCP, this paper proposes tool-path planning based on mapping method, which integrates the rheology and necessary continuity of concrete materials into the printing process parameters, improves the mutual adaptability of printing process and material characteristics, improves the continuity of printing, the compactness of filling, and then ensures the stability and durability of printing structure.

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Section: ) Calculation Of Printing Parametersmentioning

confidence: 99%

Adaptable Tool-Path Planning Method for 3D Concrete Printing Based on the Mapping Method

Wan

Wang

2021

Proceedings of the 2020 DigitalFUTURES

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“…Therefore, 3D concrete printing technology has brought new development opportunities for the construction industry. For example, the application of manufacturing architectural ornaments of complicated geometries, demonstrating the potential for complex and personalized construction [5]. Besides, 3D concrete printing technology can integrate parametric programming and optimized evaluation of architectural design proposals [6], displaying the advantages of digital construction.…”

Section: Introductionmentioning

confidence: 99%

3D printed concrete components and structures: an overview

Xiao,

Liu,

Ding

et al. 2021

Sustain. Struct.

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This paper aims to present an overview and explore components or structures suitable for 3D printed concrete. Most traditional structural forms are not well suitable for 3D printed concrete. To be more specific, it cannot fully consider the characteristics and advantages of 3D printing such as individualization and digitalization. Several 3D-printing-specific structure forms (including hollow form, tree form, arch form, and structure-functional form) are classified and the relevant successful cases are demonstrated. Moreover, the application potential of 3D printed concrete structures is illustrated and the limitations as well as the solutions for the application of 3D printed concrete in practical projects are also summarized. Based on the classification of different reinforcement materials, several reinforcement methods are intensively discussed for 3D printed concrete including steel bars, fibers and other reinforcement materials. The comparison of economic and environmental benefits between 3D concrete printing technology and traditional construction method is discussed respectively. Finally, the expected evolution of 3D printed structures is put forward and recommended.

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“…Although the 3D printing method is considered a promising technique, some factors still influence the printing performance. For example, the printing performance is strongly dependent on the fresh properties of concrete, such as its rheology and green strength [13][14][15], and the printing parameters, such as the nozzle speed, nozzle height, interlayer interval time, and extrusion rate [16][17][18][19]. These factors also influence the mechanical properties of 3D printed concrete in the hardened state.…”

Section: Introductionmentioning

confidence: 99%

Buildability and Mechanical Properties of 3D Printed Concrete

et al. 2020

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Recently, 3D concrete printing has progressed rapidly in the construction industry. However, this technique still contains several factors that influence the buildability and mechanical properties of the printed concrete. Therefore, this study investigated the effects of the nozzle speed, the interlayer interval time, the rotations per minute (RPMs) of the screw in the 3D printing device, and the presence of lateral supports on the buildability of 3D concrete printing. In addition, this paper presents the results of the mechanical properties, including the compressive, splitting tensile, and flexural tensile strengths of 3D printed concrete. The buildability of 3D printed structures was improved with an extended interlayer interval time of up to 300 s. The printing processes were interrupted because of tearing of concrete filaments, which was related to excessive RPMs of the mixing screw. The test results also showed that a lateral support with a wide contact surface could improve the resistance to buckling failure for 3D printed structures. The test results of the mechanical properties of the 3D printed concrete specimens indicated that the compressive, splitting tensile, and flexural tensile strengths significantly depended on the bonding behavior at the interlayers of the printed specimens. In addition, although metal laths were expected to improve the tensile strength of the printed specimens, they adversely affected the tensile performance due to weak bonding between the reinforcements and concrete filaments.

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Volume-forming 3D concrete printing using a variable-size square nozzle

Cited by 66 publications

References 19 publications

Adaptable Tool-Path Planning Method for 3D Concrete Printing Based on the Mapping Method

Adaptable Tool-Path Planning Method for 3D Concrete Printing Based on the Mapping Method

3D printed concrete components and structures: an overview

Buildability and Mechanical Properties of 3D Printed Concrete

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