Recess formers from the 3D concrete printer

Concrete Lightweight Ceiling project

As part of a research project, EIGNER Bauunternehmung GmbH has realized a resource-optimized reinforced concrete ceiling using hollow bodies from the 3D concrete printer. "Concrete is only used where the load-bearing structure and load transfer require it," says Wolfram Uhl, Managing Director of EIGNER Bauunternehmung GmbH.

Concrete lightweight ceiling uses a total of 168 3D-printed concrete segments as integrated formwork, reviving the forgotten architectural art of the reinforced concrete ribbed ceiling. The series of recess formers in combination with a CO2-optimized R-concrete formulation save around 35 percent CO2 compared to the originally planned reinforced concrete flat slab. The 3D-printed hollow bodies lead to significant material savings of 40% less concrete and 30% less reinforcing steel. By reducing the dead load, even further savings can be achieved through smaller foundations and a slimmer supporting structure.

With the targeted and smart use of concrete, building with concrete can already become more sustainable and climate-friendly today. The use of 3D concrete printing supports this perfectly with new load-bearing geometries and filigree shapes. Ready-made integrated formwork elements simplify and speed up work on construction sites and thus ensure significant savings in terms of materials, labor and CO2.

Special objects from the 3D concrete printer

3D printing goes beyond the previous limits of concrete as a material and enables completely new design concepts for sculptures, molded parts, design solitaires and even pieces of furniture. Plenty of room for your designs and ideas. Concrete has never been so versatile and individual.