A review of printing strategies, sustainable cementitious materials and characterization methods in the context of extrusion-based 3D concrete printing

Chen, Yu; He, Shan; Gan, Yidong; Çopuroğlu, Oğuzhan; Veer, Fred; Schlangen, Erik

doi:10.1016/j.jobe.2021.103599

Cited by 50 publications

(29 citation statements)

References 189 publications

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“…• Flowability: flowability depends on the extrusion system used. 58 An increased flowability will be pumped more easily, but it comes in contrast to buildability. The threshold set for this study is a mortar flow above 60%, 5 minutes after the end of the mixing process.…”

Section: Design and Databasementioning

confidence: 99%

Automating mix design for 3D concrete printing using optimization methods

Sergis

Ouellet‐Plamondon

2022

Digital Discovery

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Section: Design and Databasementioning

confidence: 99%

Automating mix design for 3D concrete printing using optimization methods

Sergis

Ouellet‐Plamondon

2022

Digital Discovery

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“…In recent years, there has been a dynamic development of 3D concrete printing (3DCP) using the extrusion method. This technology consists of linear extrusion of cement mortar layer by layer without the use of formwork, which can reduce production costs, increase the speed of production processes, and allow the economical production of geometrically complex elements [ 13 , 14 ]. Additive manufacturing (AM) of cement materials is one of the most interesting methods of producing concrete elements used in the construction industry.…”

Section: Introductionmentioning

confidence: 99%

“…Additive manufacturing (AM) of cement materials is one of the most interesting methods of producing concrete elements used in the construction industry. Compared to conventional manufacturing, 3DCP can reduce the environmental impact by up to 50% [ 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Partial replacement of cement with other materials allows for the production of hybrid cement-geopolymer concrete. Earlier it was shown that Portland cement can be partially replaced by various materials [ 14 ], such as a metakaolin (MK) [ 18 ], which improves the properties of hybrids, their workability and durability, and reduces the environmental impact of the cement industry [ 19 , 20 , 21 ]. Further, fly ash and slag, due to their properties being similar to cement, are also suitable alternatives to its partial replacement [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

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Properties of 3D Printed Concrete–Geopolymer Hybrids Reinforced with Aramid Roving

et al. 2022

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Three-dimensional concrete printing (3DCP) is an innovative technology that can lead to breakthrough modifications of production processes in the construction industry. The paper presents for the first time the possibility of 3D printing concrete–geopolymer hybrids reinforced with aramid roving. Reference concrete samples and concrete–geopolymer hybrids composed of 95% concrete and 5% geopolymer based on fly ash or metakaolin were produced. The properties of the samples without reinforcement and samples with 0.5% (wt.) aramid roving were compared. The frost resistance tests, UV radiation resistance, and thermal conductivity were evaluated for samples that were 3D-printed or produced by the conventional casting method. Compressive strength tests were carried out for each sample exposed to freeze–thaw cycles and UV radiation. It was observed that after the frost resistance test, the samples produced by the 3D printing technology had a minor decrease in strength properties compared to the samples made by casting. Moreover, the thermal conductivity coefficient was higher for concrete–geopolymer hybrids than concrete reinforced with aramid roving.

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“…It can be stated that AM has reached a mature state in many applications including civil engineering [17][18][19]. For instance, it has been considered a key technology to design new generation of cementitious materials using crafting technology [20][21][22]. In this work, a particular AM process based Fused Deposition Modelling (FDM) is considered to design a new generation of insolation materials for civil engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Hygrothermal and Microstructural Investigation of PLA and PLA-Flax Printed Structures

Belarbi

Benmahiddine

Hamami

et al. 2022

Fibers

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The aim of this work is to explore the manufacturing of insulation structures using fused filament deposition of biosourced materials. The approach considers printing of Polylactic acid (PLA) and PLA-flax (PF) structures using varied infill density and printing temperatures. Differential Scanning Calorimetry and Thermal Gravimetry analysis are performed to study thermal behaviour of PLA and PF and derive weight content of fibres within PF. Thermal measurements show a strong dependence of thermal conductivity with infill density and slightly improved thermal insulation of PF compared to PLA. Moreover, both PF and PLA show a hydrophobic behaviour unlike conventional green concretes based on hemp or flax. In addition, both scanning electron and optical microscopies show marked morphological changes induced by the laying down process for PF. This latter exhibits a more complex and tortuous microstructure compared to PLA marked by the presence of inter-filament porosity. This work concludes with superior hygrothermal properties of PLA and PF compared to other biosourced materials such as hemp or flax concrete. This work also concludes with the beneficial role of flax fibres that provides better hygrothermal properties to the printed structures as well as on the need to optimize the infill characteristics including density and cell morphology density.

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A review of printing strategies, sustainable cementitious materials and characterization methods in the context of extrusion-based 3D concrete printing

Cited by 50 publications

References 189 publications

Automating mix design for 3D concrete printing using optimization methods

Automating mix design for 3D concrete printing using optimization methods

Properties of 3D Printed Concrete–Geopolymer Hybrids Reinforced with Aramid Roving

Hygrothermal and Microstructural Investigation of PLA and PLA-Flax Printed Structures

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