Strategic Optimization of 3D-Concrete-Printing Using the Method of CONPrint3D®

The resource efficiency and labor productivity in the construction industry are still viewed critically. Concrete 3D-printing processes have the potential to significantly improve both factors. Currently, research activities in this field are growing rapidly worldwide, thus similar advances and market developments can be expected, as have already occurred in other sectors of the stationary industry. The TU Dresden relies on the development of the CONPrint3D® (Concrete ON-site 3D-Printing). It specifically relies on: established machine technology, the production of fully filled concrete structures, sustainable concrete formulations with a maximum grain size of up to 16 mm and the use directly on the construction site. In contrast to small-scale 3D-printing processes, the data processing chain for large-format 3D-printing with concrete still has considerable deficits. In order to depict the complex solidification properties of the building concrete, computer simulations are indispensable as a basis for the development of an optimized printing strategy. In this paper, investigations on the strategic process optimization of concrete printing using the method CONPrint3D® are presented. First, the relevant boundary conditions of concrete 3D-printing are described. Subsequently, calculation methods of the trajectory planning are presented.