One of the biggest challenges in using additive manufacturing in construction is the lack of standardized norms and building regulations. To overcome this hurdle, the project is taking an innovative approach: the 3D-printed formwork serves as permanent formwork, is reinforced with conventional steel, and then filled with in-situ concrete. This combines the advantages of 3D concrete printing with the requirements of applicable building law – for practical and compliant implementation.

The printed formwork has a dual function: it reproduces the rib geometry of the slab and at the same time makes the internal force flow of the structure visible. In addition, additive manufacturing enables complex geometries that would be difficult or impossible to achieve with conventional formwork methods. The result is a resource-saving, material-efficient, and design-flexible construction method that is consistently oriented toward the principles of sustainable building.

The 1:1 scale demonstrator is currently being manufactured at the Riedel Bau Talentfabrik and is scheduled for completion by the end of October 2025. The reinforcement work has been successfully completed – the demonstrator is now ready for concreting.

Special thanks go to the Steel Construction Department for their support and the tests carried out in the steel construction laboratory, as well as to all the companies involved.