3D printing buildings without cement

Researchers at ETH Zurich are developing "impact printing," a sustainable construction method using local materials like sand, clay, and gravel. This technique repurposes excavated materials from construction sites, reducing costs and carbon emissions compared to 3D printing. The process involves creating an optimized particle mix for structural integrity, applied through a robotic system. This innovation emerges as 3D-printed housing gains popularity in the US and Europe due to efficiency benefits.