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
Appears on pages(s): 274-289
Keywords: casting, composite, geopolymer, mechanical, process, robocasting, shaping
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.