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

Centrale Lille, Civil Engineering, Cité Scientifique, 59651 Villeneuve-d’Ascq, France
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Buildings 2019, 9(12), 245; https://doi.org/10.3390/buildings9120245
Received: 14 November 2019 / Revised: 8 December 2019 / Accepted: 13 December 2019 / Published: 17 December 2019
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. View Full-Text
Keywords: 3D printing; extrusion construction industry; additive manufacturing; fresh mortar; mortar printing; measurement; printability; flowability; buildability 3D printing; extrusion construction industry; additive manufacturing; fresh mortar; mortar printing; measurement; printability; flowability; buildability
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Lafhaj, Z.; Rabenantoandro, A.Z.; el Moussaoui, S.; Dakhli, Z.; Youssef, N. Experimental Approach for Printability Assessment: Toward a Practical Decision-Making Framework of Printability for Cementitious Materials. Buildings 2019, 9, 245.

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