Anisotropic behavior in bending of 3D printed concrete reinforced with fibers

Ding, Tao; Xiao, Jianzhuang; Zou, Shuai; Zhou, Xinji

doi:10.1016/j.compstruct.2020.112808

Cited by 144 publications

(35 citation statements)

References 31 publications

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“…The increase in flexural performance of fiber-reinforced printable mixes has been associated with the alignment of the fibers along the printing direction at the extruding nozzle [ 61 ]. Fibers prevent the microcracks development into macrocracks and stitch together cracked-printed concrete parts, consequently increasing the flexural strength [ 95 , 188 ]. Alignment of fibers with the printing direction increases in the case of using smaller-sized nozzles and higher dosage of fibers.…”

Section: Anisotropy In Mechanical Properties Of 3d-printed Concretementioning

confidence: 99%

“…Compressive, flexural, tensile strengths and tensile strain values, as well as crack saturation, increased with the amount of PE fibers in ECC. Ding et al [ 188 ] used polyethylene fibers to reinforce concrete and observed that the addition of fibers increases the number of cracks and spacing between cracks. The post-peak behavior of printed concrete under flexural strength was increased with the increasing length of fibers.…”

Section: Reinforcement Strategies For Concrete 3d Printingmentioning

confidence: 99%

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3D Concrete Printing: A Systematic Review of Rheology, Mix Designs, Mechanical, Microstructural, and Durability Characteristics

2021

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This paper provides a state-of-the-art report on the up-to-date research on the emerging 3D concrete printing technology from the concrete materials perspective. It reviews the recent research focused on understanding and characterizing the rheological necessities of the concrete printing process and discusses how the researchers are tailoring compatible mix proportions for the 3D concrete printing process by using eco-friendly binders, waste aggregates, chemical admixtures, and nano-additives. This paper systematically evaluates anisotropic behavior in the mechanical properties of printed concrete and establishes an order for anisotropic behavior in the compressive, flexural, and tensile strengths along three different axes (X, Y, and Z axes) of printed concrete. It evaluates the ratio of flexural strength to the compressive strength of printed concrete along the above three axes. This article explains the influence of variation of printing process parameters on the mechanical properties and discusses reinforcement approaches used for increasing structural performance. The microstructure at the interface of adjacent layers and also at the interface of the reinforcement-cement matrix is discussed. The recent research on the durability performance of printed concrete is critically discussed and future research needs for 3D concrete printing are identified in this paper.

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Section: Anisotropy In Mechanical Properties Of 3d-printed Concretementioning

confidence: 99%

Section: Reinforcement Strategies For Concrete 3d Printingmentioning

confidence: 99%

3D Concrete Printing: A Systematic Review of Rheology, Mix Designs, Mechanical, Microstructural, and Durability Characteristics

2021

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“…The specific method is to add fibers to the concrete mix, and then print with the fiber reinforced concrete. Different kinds of short fibers are applied to reinforce 3D printed concrete, such as short polymer fibers by Soltan et al [58], Li et al [59], Zhu et al [60], Ding et al [61], and Ogura et al [62], basalt fibers by Ma et al [63], steel fibers by Pham et al [64] and Bos et al [65]. The addition of fibers can improve the tensile strength of concrete.…”

Section: Fibersmentioning

confidence: 99%

“…For example, the tensile strength of 3D printed concrete designed by Soltan et al [58] has reached 6 MPa and the tensile strain 4%. Ding et al [61] suggested that fiber length had no obvious effect on the peak stress, but had a significant effect on the post-peak behavior. Ogura et al [62] characterized that fiber contents of 1% and 1.5% by volume are suitable for 3D printed concrete.…”

Section: Fibersmentioning

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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“…Fiber Reinforced 3D Printed Concrete has reported improvement in mechanical performance in increasing the tensile strength and strain hardening and softening behavior in concrete [35,36]. However, research in Fiber Reinforced 3D Printed Concrete is still ongoing and it is still unable to match the performance of concrete reinforced with conventional rebars.…”

Section: Reinforcement During Printingmentioning

confidence: 99%

Investigation of novel 3D-printing methods for freeform construction

Lim¹

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Ning for their guidance and encouragement as well as constant support throughout my Ph.D. study. I deeply appreciate Assoc. Prof. Pham for leading the exciting research on 3D printing materials and making significant impacts to the research community. He has always been providing effective discussion about the novelty of my research and patient guidance whenever I encountered problems. Assoc. Prof. Pham has devoted considerable effort and time in supporting my research study and provided precious advice for the writing and presentation of academic reports. I would like to wholeheartedly thank him for giving invaluable guidance and memorable experiences, allowing me to discover the entirely new field with countless supports and unlimited excitement. I will also give my sincere thanks to Prof. Tan who encouraged and supported me in this Ph.D. thesis research. Financial support from the following sources is thankfully

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Anisotropic behavior in bending of 3D printed concrete reinforced with fibers

Cited by 144 publications

References 31 publications

3D Concrete Printing: A Systematic Review of Rheology, Mix Designs, Mechanical, Microstructural, and Durability Characteristics

3D Concrete Printing: A Systematic Review of Rheology, Mix Designs, Mechanical, Microstructural, and Durability Characteristics

3D printed concrete components and structures: an overview

Investigation of novel 3D-printing methods for freeform construction

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