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@article{3c4c4a0b449d47e2a7c2e9fdf2172051,
title = "The Effect of Viscosity-Modifying Admixture on the Extrudability of Limestone and Calcined Clay-Based Cementitious Material for Extrusion-Based 3D Concrete Printing",
abstract = "To investigate the effects of viscosity-modifying admixture (VMA) on the extrudability of limestone and calcined clay-based cementitious materials, three mix designs with different dosages of VMA were proposed in this study. The ram extrusion was utilized as an extrusion model for exploring the fresh properties of printable materials. Two methods were used, based on the ram extruder setup—(a) extruding materials with the same extrusion speed at different rest times to determine how the pressure changes with time; (b) extruding materials with different extrusion speeds at the same rest time to investigate the material flow parameters using the Basterfield et al. model. The main findings of this study could be summarized as—(1) the extrusion pressure of all mix designs exhibited an increasing trend with time. At the same tested age, the extrusion pressure under 0.25 mm/s of piston speed was increased and the shape retention of the extruded filaments was enhanced by increasing the dosage of VMA; (2) the correlation between the experimental results and the Basterfield et al. model was excellent (R-squared value: 0.99). The mixture with a higher content of VMA showed an increased elongational yield stress, flow consistency, and shear yield stress.",
keywords = "Extrudability, Extrusion-based 3D concrete printing, Limestone and calcined clay, Ram extruder, Viscosity-modifying admixture",
author = "Yu Chen and {Chaves Figueiredo}, Stefan and {\c C}ağlar Yal{\c c}inkaya and Oguzhan Copuroglu and Fred Veer and E. Schlangen",
year = "2019",
doi = "10.3390/ma12091374",
language = "English",
volume = "12",
journal = "Materials",
issn = "1996-1944",
publisher = "MDPI",
number = "9",

}

RIS

TY - JOUR

T1 - The Effect of Viscosity-Modifying Admixture on the Extrudability of Limestone and Calcined Clay-Based Cementitious Material for Extrusion-Based 3D Concrete Printing

AU - Chen, Yu

AU - Chaves Figueiredo, Stefan

AU - Yalçinkaya, Çağlar

AU - Copuroglu, Oguzhan

AU - Veer, Fred

AU - Schlangen, E.

PY - 2019

Y1 - 2019

N2 - To investigate the effects of viscosity-modifying admixture (VMA) on the extrudability of limestone and calcined clay-based cementitious materials, three mix designs with different dosages of VMA were proposed in this study. The ram extrusion was utilized as an extrusion model for exploring the fresh properties of printable materials. Two methods were used, based on the ram extruder setup—(a) extruding materials with the same extrusion speed at different rest times to determine how the pressure changes with time; (b) extruding materials with different extrusion speeds at the same rest time to investigate the material flow parameters using the Basterfield et al. model. The main findings of this study could be summarized as—(1) the extrusion pressure of all mix designs exhibited an increasing trend with time. At the same tested age, the extrusion pressure under 0.25 mm/s of piston speed was increased and the shape retention of the extruded filaments was enhanced by increasing the dosage of VMA; (2) the correlation between the experimental results and the Basterfield et al. model was excellent (R-squared value: 0.99). The mixture with a higher content of VMA showed an increased elongational yield stress, flow consistency, and shear yield stress.

AB - To investigate the effects of viscosity-modifying admixture (VMA) on the extrudability of limestone and calcined clay-based cementitious materials, three mix designs with different dosages of VMA were proposed in this study. The ram extrusion was utilized as an extrusion model for exploring the fresh properties of printable materials. Two methods were used, based on the ram extruder setup—(a) extruding materials with the same extrusion speed at different rest times to determine how the pressure changes with time; (b) extruding materials with different extrusion speeds at the same rest time to investigate the material flow parameters using the Basterfield et al. model. The main findings of this study could be summarized as—(1) the extrusion pressure of all mix designs exhibited an increasing trend with time. At the same tested age, the extrusion pressure under 0.25 mm/s of piston speed was increased and the shape retention of the extruded filaments was enhanced by increasing the dosage of VMA; (2) the correlation between the experimental results and the Basterfield et al. model was excellent (R-squared value: 0.99). The mixture with a higher content of VMA showed an increased elongational yield stress, flow consistency, and shear yield stress.

KW - Extrudability

KW - Extrusion-based 3D concrete printing

KW - Limestone and calcined clay

KW - Ram extruder

KW - Viscosity-modifying admixture

UR - http://www.scopus.com/inward/record.url?scp=85065743471&partnerID=8YFLogxK

U2 - 10.3390/ma12091374

DO - 10.3390/ma12091374

M3 - Article

VL - 12

JO - Materials

JF - Materials

SN - 1996-1944

IS - 9

M1 - 1374

ER -

ID: 53672401