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Formulations de composites à base de liants basse température type géopolymère à base d'argilite et de différents renforts : réalisation d'une pièce par fabrication additive

Abstract : This work is part of the Cigéo project (geological industrial disposal for radioactive wastes) and focuses on studying alternative materials for the elaboration of the lining of the high-level radioactive waste storage cells. Composites materials with inorganic matrix and reinforcements are one of the innovations being considered as an alternative to replace metallic materials in the lining. The use of geopolymers reinforced with inorganic elements could meet the desired specifications. The insertion of wollastonite and glass fibers to a geopolymer matrix allowed to control viscosity suitable for shaping by casting and additive manufacturing while ensuring the mechanical strength of the consolidated material. This allows obtaining flexural and compressive strengths going up to 101 MPa and 20 MPa, respectively. To shape the extruded solution at a half scale, a 3D printing system was then developed. A specific extrusion head has been designed and integrated into a 6-axis robotic cell. The control and identification of printing and materials parameters make it possible to control the process and to print geopolymer composite structures at half scale (ɸ = 35 cm).
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https://tel.archives-ouvertes.fr/tel-03115499
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Submitted on : Tuesday, January 19, 2021 - 5:02:11 PM
Last modification on : Wednesday, October 27, 2021 - 12:50:34 PM
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  • HAL Id : tel-03115499, version 1

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Julien Archez. Formulations de composites à base de liants basse température type géopolymère à base d'argilite et de différents renforts : réalisation d'une pièce par fabrication additive. Matériaux. Université de Limoges, 2020. Français. ⟨NNT : 2020LIMO0059⟩. ⟨tel-03115499⟩

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