Abstract
Robotic concrete extrusion is a novel additive manufacturing process (3D
concrete printing) and is part of a continuously digitally controlled
value chain. According to the state of the art, concrete is considered
to be an isotropic material due to the manufacturing process. However,
for the additive manufacturing process, the isotropic approach hast to
be reconsidered due to the layered structure. It can be assumed that due
to the layered structure, the material properties vary depending on the
deposition direction and the geometry of the layers. The aim of the work
was to record the material-technical characteristics of extruded
elements manufactured according to standards in comparison with concrete
recipes. Process-related influences on the mechanical parameters of
additively manufactured concrete elements were examined and evaluated in
more detail. Based on the findings obtained, the dimensioning, design
and measurement of components can be carried out and thus guidelines for
components can be derived. With these derived guidelines, the material
utilization and economic efficiency can be improved.