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Title: Rheology and Mechanical Properties of Different Geopolymer Composites

Author(s): J.Archez, N. Texier-Mandoki, X. Bourbon, J.F. Caron, and S. Rossignol

Publication: Symposium Paper

Volume: 349


Appears on pages(s): 274-289

Keywords: casting, composite, geopolymer, mechanical, process, robocasting, shaping

DOI: 10.14359/51732752

Date: 4/22/2021

This work aims to study the influence of the shaping process on the mechanical properties of geopolymer composites reinforced with glass fibers and wollastonite. To this end, the synthesis feasibility of two geopolymer composite formulations was first determined. The influence of casting, extrusion and robocasting on mechanical properties was then studied with compressive and three-points bending tests and microstructural analysis. The results showed that the casting process is preferable to be used for low viscosity geopolymer composite while robocasting is more appropriate for geopolymer composite with high viscosity. The extruded and cast samples exhibit similar compressive data’s. The microstructural analysis showed that the robocasting process orients the fibers in the printing direction with an undefined interlayer. The casting process leads to a homogeneous material while the robocasting process conducts to an anisotropic material.