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Rheological requirements for printable concretes

Roussel, Nicolas

Cement and concrete research, 2018-10, Vol.112, p.76-85 [Periódico revisado por pares]

Elmsford: Elsevier Ltd

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Título:
Rheological requirements for printable concretes
Autor: Roussel, Nicolas
Assuntos: Additive manufacturing ; BUCKLING ; Concrete ; CONCRETES ; CONTROL ; CRACKS ; DEPOSITION ; DRYING ; EXTRUSION ; Extrusion rate ; FAILURES ; Interlayers ; LAYERS ; MATERIALS SCIENCE ; Modulus of elasticity ; Nozzles ; Printing ; Rheological properties ; Rheology ; Strain ; STRESSES ; Surface stability ; VISCOSITY ; Yield stress
É parte de: Cement and concrete research, 2018-10, Vol.112, p.76-85
Descrição: We study in this paper the rheological requirements for printable concrete in terms of yield stress, viscosity, elastic modulus, critical strain, and structuration rate. We first discuss the extrusion/deposition process at the level of the nozzle from a material perspective. We then focus on the rheological requirements needed to prevent the flow of one layer or the strength-based failure of the rising printed element. We moreover discuss the rheological requirements needed to control the final geometrical dimensions of one layer and of the entire object, including buckling stability and surface cracking. We finally describe the requirement for a proper intermixing of the layers interface and also note that drying of the upper surface of the layer at rest could also play a major role on the interlayer bond. Finally, we evaluate the effect of the use of printing supports (i.e. non-direct printing) on the above rheological requirements.
Editor: Elmsford: Elsevier Ltd
Idioma: Inglês

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Rheological requirements for printable concretes

Roussel, Nicolas

Elmsford: Elsevier Ltd

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