Improving flexural characteristics of 3D printed geopolymer composites with in-process steel cable reinforcement

Lim, Jian Hui; Panda, Biranchi; Pham, Quang-Cuong

doi:10.1016/j.conbuildmat.2018.05.010

Cited by 193 publications

(72 citation statements)

References 27 publications

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“…In-process reinforcement: Continuous reinforcement is placed as the material is extruded. Researchers confirmed the feasibility of simultaneously entraining steel cables to printed mixtures during the extrusion process [163][164][165][166] (Figure 14a). Despite improving mechanical capacities of printed structures, cable reinforcement fails to address the problem of weak interlayer bonding introduced by the printing process.…”

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confidence: 78%

Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

Hojati

et al. 2020

Sustainability

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3D-printing of cementitious materials is an innovative construction approach with which building elements can be constructed without the use of formwork. Despite potential benefits in the construction industry, it introduces various engineering challenges from the material point of view. This paper reviews the properties of extrusion-based 3D-printed cementitious materials in both fresh and hardened states. Four main properties of fresh-state printing materials are addressed: flowability, extrudability, buildability, and open time, along with hardened properties, including density, compressive strength, flexural strength, tensile bond strength, shrinkage, and cracking. Experimental testing and effective factors of each property are covered, and a mix design procedure is proposed. The main objective of this paper is to provide an overview of the recent development in 3D-printing of cementitious materials and to identify the research gaps that need further investigation.

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confidence: 78%

Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

Hojati

et al. 2020

Sustainability

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“…The first attempt in this regard was the entrainment of steel coils by Khoshnevis et al [20]. Following this, many researchers used specially designed print heads to have steel cables incorporated within the deposited layers [148][149][150][151][152]. Mechtcherine et al [153] envisaged an idea of printing steel reinforcement synchronously with concrete using gas arc welding.…”

Section: Tensile Strength and Ductilitymentioning

confidence: 99%

“…However, one can use alternative binders instead of portland cement to improve sustainability. In this regard, several studies focused on developing 3D printable mixtures with alkali-activated binder systems [90,93,95,99,103,108,109,117,[150][151][152][196][197][198][199], calcium sulfoaluminate cements [128,142,200,201], limestone clay calcined cements [51,[202][203][204], and magnesium potassium phosphate cements [205,206]. However, there are challenges in designing printable concretes with binder systems such as limestone calcined clay due to chemical admixture compatibility issues [207,208].…”

Section: Sustainabilitymentioning

confidence: 99%

Extrusion-based concrete 3D printing from a material perspective: A state-of-the-art review

Mohan

Rahul

Schutter

et al. 2021

Cement and Concrete Composites

239

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“…Incorporation of reinforcement into the concrete matrix during the printing process is one of the most challenging issues needed to be dealt with to enable structural applications of 3D printing technology [11,12]. In terms of materials, most of the printable mixtures contain ordinary Portland cement (PC) as the prime binder material due to its inherent thixotropic properties that originate from the combined effect of interparticle, gravitational and inertial forces [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the properties of alkali-activated slag mixes involving the use of nanoclay and nucleation seeds for 3D printing

Panda

Ruan

Unluer

et al. 2020

Composites Part B: Engineering

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144

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This study investigated the properties of alkali activated slag (AAS) binders formulated for extrusion-based 3D printing. The fresh properties of AAS mixes were tailored through the use of nanoclay (NC) and nucleation seeds. The printability criteria employed were the ease of extrusion (extrudability) and the stability of the layered structure (buildability). Introduction of 0.4% NC in AAS mixes led to improved thixotropic properties due to the flocculation effect, which accounted for the extrudability and shape fidelity of the binder. Inclusion of 2% hydromagnesite seeds in this mix design provided additional nucleation sites for the increased precipitation of hydrate phases, resulting in denser microstructures. This enhanced the hydration reaction and improved the structural build-up rate necessary for large-scale 3D printing. The developed AAS mix containing 0.4% NC and 2% hydromagnesite seeds was used in the printing of an actual 3D structure to demonstrate its feasibility to be used in 3D printing applications.

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Improving flexural characteristics of 3D printed geopolymer composites with in-process steel cable reinforcement

Cited by 193 publications

References 27 publications

Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

Extrusion-based concrete 3D printing from a material perspective: A state-of-the-art review

Investigation of the properties of alkali-activated slag mixes involving the use of nanoclay and nucleation seeds for 3D printing

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