Printing houses with earth-based materials

Researchers at ETH Zurich have developed a rapid robotic printing process for earth-based materials that eliminates the need for cement.

Entire houses can be constructed using clay or excavated earth, materials that are inexpensive, widely available, and sustainable as they do not require cement. However, traditional building methods for these materials are labour-intensive, slow, and therefore costly.

Researchers at ETH Zurich have developed a rapid robotic printing process for earth-based materials that eliminates the need for cement. This process, known as “impact printing,” involves a robot shooting material from above to gradually build a wall. The components bond upon impact, requiring minimal additives. Unlike concrete 3D printing, this method does not necessitate pauses for the material to solidify. The current mixture used includes excavated materials, silt, and clay. 75 per cent of the material is reclaimed waste.

Photos: ETH Zurich