MultiCarb3DBeton

Multifunctional 3D printing with concrete and carbon fibres for sustainable automated lightweight construction (MultiCarb3DBeton). Within this project, concretes adapted to additive manufacturing with density and strength gradients are extruded using a multi-component printing nozzle. During this process, fibres are integrated for the production of reinforced components. The concretes used are produced with CO2-optimised binders and are provided with an accelerator shortly before extrusion so that the printed layers can immediately hold further layers. For a good fibre-concrete bond, the fibres are coated and structured before being deposited. With a depositing unit and an adapted robot movement, fibres are only inserted into the structure where increased tensile strength is needed. Materials, manufacturing methods and digital planning methods for individualised, multifunctional lightweight components with material gradients are manufactured and investigated robotically. The key findings and engineering developments will be optimised for the production of high-quality precast concrete parts. In the process, additive manufacturing with concrete is combined with subtractive manufacturing in the fresh and hardened state and the feasibility is validated using reference components up to walk-on demonstrators.