Overview

• Biobeton, a sustainable concrete developed by the University of Stuttgart, uses urine and biomineralization to reduce CO₂ emissions and energy consumption compared to traditional cement.
• The production process involves bacteria breaking down urea in urine, releasing calcium carbonate, which acts as a natural binding agent to solidify the material.
• Initial tests with synthetic urea achieved compressive strengths over 50 Megapascal, while the current goal for real urine-based Biobeton is 30-40 Megapascal for practical applications.
• The SimBioZe project, funded by the Baden-Württemberg state government, will test urine collection and Biobeton production at Stuttgart Airport over the next three years.
• The project aims to demonstrate a circular construction model that repurposes waste resources while reducing the environmental footprint of the construction industry.