More climate-friendly and reusable
Bespoke concrete from a 3D printer
A European research team, including Empa, is developing concrete components that are produced using 3D printing, are reusable and generate less CO₂. The aim is to create a stable, lightweight building material that requires less material.
In the ‘CARBCOMN’ project, researchers are focusing on digital manufacturing, alternative binders and optimised shapes. Steel slag, for example, is used instead of cement. The components are designed to be dismantled and reused after their initial use.
Stability through form
The concrete consists of industrial waste and is printed layer by layer. The structures are designed to absorb pressure in particular. This means less material is required and hardly any steel reinforcement is needed. Cavities are specifically incorporated to save weight.
Targeted use of steel
Steel is used only where necessary. Shape-memory alloys contract when heated and subsequently reinforce the components. They can be separated again later, which facilitates reuse.
CO₂ sequestration during curing
After printing, the concrete cures in a CO₂ environment, which additionally sequesters CO₂. At the same time, digital tools for planning and manufacturing are being developed. The first 3D-printed building module is scheduled to be completed by 2028.
