3D printable concrete: Mixture design and test methods

Rahul, A.V.; Santhanam, Manu; Meena, Hitesh; Ghani, Zimam

doi:10.1016/j.cemconcomp.2018.12.014

Cited by 308 publications

(128 citation statements)

References 22 publications

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“…The first research were connected with basic properties of the materialskey factors of effectiveness 3D printing process, such as: viscosity and time of bonding (Labonnote et al, 2016;Rahul et al, 2019). This basic properties are related with the thixotropic, and allow to understood as high yield strength and low viscosity behavior of the materials, including (Labonnote et al, 2016;Panda and Tan, 2019):…”

Section: Introductionmentioning

confidence: 99%

Development of 3D Printing Technology for Geopolymers

Korniejenko¹,

Łach²,

Mikuła³

et al. 2020

XV International Conference on Durability of Building Materials and Components. eBook of Proceedings

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Section: Introductionmentioning

confidence: 99%

Development of 3D Printing Technology for Geopolymers

Korniejenko¹,

Łach²,

Mikuła³

et al. 2020

XV International Conference on Durability of Building Materials and Components. eBook of Proceedings

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“…They considered a printed specimen to have "dimension consistency" if the dimensions of the printed line were within 10% of the dimensions of the nozzle. Rahul et al [14] printed a filament of concrete through a nozzle of size 30 mm × 20 mm, and considered a mix to be "extrudable" if dimensions of the cross-section of the printed filament was within 0.5 mm of the dimensions of the nozzle (approximately 2% of the dimension of the nozzle). Panda et al [15] defined a "shape retention factor" as the ratio of cross-sectional area of the nozzle to that of the printed line, and observed that the factor for the printed specimens was between 0.7 and 0.9.…”

Section: Introductionmentioning

confidence: 99%

“…Reported initial yield strength of the concrete printed till date has been in the range of 300 -4,000 Pa [8,11,22,[24][25][26][27]. Rahul et al [14] suggest that initial yield strength of the concrete mix for acceptable extrudability and buildability should be in the range of 1,500 -2,500 Pa.…”

Section: Introductionmentioning

confidence: 99%

Additive manufacturing of self-compacting concrete through controlled heating

Shekhar¹,

Kumar²,

Mathur³

2020

Preprint

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Construction using concrete through additive manufacturing is gaining attention. This approach involves a layer-wise deposition of concrete. A layer of printed concrete needs to be ``strong" enough to sustain the weight of layers to be printed above. These layers may not bond well with each other, however. Self-compacting concrete (SCC) may lead to a better bonding, but it may not have sufficient strength. This paper presents a method to print SCC through controlled heating. Properties of printed concrete in fresh and hardened states are studied. Heating leads to a sharp rise in the strength of freshly-printed concrete layers, but a long duration of heating may lead to a reduction in strength of printed concrete after hardening particularly if water-to-cement ratio is small or if loads are applied parallel to the printed layers.

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“…Existing study on material printability focus on a yield stress-based mixture design approach, or numerical approach for 3D printable mortars [28,29]. This study will evaluate the materials performance of different printing trials.…”

Section: Introductionmentioning

confidence: 99%

Experimental Approach for Printability Assessment: Toward a Practical Decision-Making Framework of Printability for Cementitious Materials

et al. 2019

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The objective of this paper is to propose a pre-experimental framework of printability pre-assessment of cementitious materials. This study firstly presents a general review of additive manufacturing in construction and then examines the main characteristic of the material formulation and printability properties based on extrusion technique. This framework comes with experimental tests to determine a qualitative printability index of mixtures. It uses mix-designs reported in the literature to define interval ratio of mixture design to be investigated in this study. The focus was put on two criteria that influence the formulation namely flowability and buildability. Two practiced based tests, mini slump and cone penetrometer, were used to draw the flowability and buildability dimensionless index. The results were analyzed by introducing an optimal printability coefficient and examining their time evolution. An optimal time of printing was determined Toptimal. Finally, a 3D mortar printing system and its operational process are presented. Then, based on the measurement, the optimal mixture is identified and printed in a large-scale geometry.

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3D printable concrete: Mixture design and test methods

Cited by 308 publications

References 22 publications

Development of 3D Printing Technology for Geopolymers

Development of 3D Printing Technology for Geopolymers

Additive manufacturing of self-compacting concrete through controlled heating

Experimental Approach for Printability Assessment: Toward a Practical Decision-Making Framework of Printability for Cementitious Materials

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