Impression 3D de matériaux de construction : application à la construction des murs structurels des bâtiments

As a potential solution to the low productivity of the construction industry, concrete 3D printing has been examined for many years. Nevertheless, the environmental impact induced by the use of cement is still a persistent and inescapable issue. Considering earth is one of the oldest building materials with a relatively low environmental impact, the goal of this thesis is to explore 3D printing employing earth.To facilitate the subsequent selection of printable earth materials, a systematic and progressive selection procedure was initially investigated. This process is divided into two primary components: the selection of earth materials for construction purposes and the printing performance evaluation of printable earth material formulations.Following that, an assessment of more locally sourced soils was performed to obtain further information on earth suitable for printing, as well as verify and improve the achievement outlined in the selection procedure.Moreover, it is essential to emphasize the buildability aspect due to the lack of formwork, hence experimental and analytical investigations to examine the impact of printing parameters on elastic buckling and plastic collapse were conducted, respectively. Furthermore, the mechanical anisotropy of printed earth components caused by the deposition process was figured out. The final investigation focused on the impact of binders to improve printability and enhance the fast hardening of the earth material