Research Summary Report A03
Extrusion of Near-Nozzle Mixed Concrete –Individually Graded in Density and in Rate of 3D Fibre Reinforcement
[26.08.2022]
Dr.-Ing. Matthäus, Carla, TP editor, c.matthaeus@tum.de, TUM, cbm
Prof. Dr.-Ing. Gehlen, Christoph, PL, gehlen@tum.de, TUM, cbm
The goal of A03 is to establish a concrete extrusion process using a near nozzle mixing approach to enable the change of material properties while printing (gradation). With this approach multifunctional components can be realized. For example, a component can simultaneously fulfill load-bearing and thermal insulation functions by locally changing the material properties.
Current state of research
The second iteration of the Gradation-ready Extrusion System (GRES V2) is under development. The first results show a better performance in comparison to the first prototype (GRES V1) regarding robustness and process stability. Soon the GRES V2 will be mounted on an industrial robot to enable the printing process. Figure 2 shows the material tests of GRES V1. The Apparent irregularities in bead consistency are expected to disappear with GRES V2.
Figure 1: Rendering of the NNMS. Right: NNMS, Left: Second Robt to insert Steel Reinforcement
Figure 2: GRES V1 Material tests.
