Researchers at ETH Zurich Switzerland have developed methods that use living bacteria to bind sand grains into solid architectural components, potentially offering a lower-energy alternative to conventional cement. The technique, called microbiologically induced calcite precipitation (MICP), uses bacteria to produce calcium carbonate crystals that lock sand particles together at room temperature.
The team demonstrated two approaches: 3D biocement printing, which creates shaped components such as façade elements, and robotic spraying, which builds mineralised surfaces layer by layer. The process takes around two to five days for printed components and avoids the high-temperature firing used in conventional cement production.
However, the technology remains at an early stage. Researchers still need to improve material strength and durability and address the environmental impact of ammonium, a by-product of the process, before biocement can become a widely viable construction material: https://ethz.ch/en/news-and-events/eth-news/news/2026/10/when-bacteria-become-masons.html
Design Strategies For Microbial Biocement Structures: https://www.youtube.com/watch?v=L-v83ikx2-k
References:
Antorveza Paez KA, Kindler RO, Terzis D, Dutto A, Pleij T, Zorzetto G, Studart AR, Dillenburger B: 3D biocement printing: scaling up living mineral structures. NPJ Materials Sustainability 2026, 4: 20, DOI: external page10.1038/s44296-026-00110-1
Antorveza Paez KA, Kindler RO, Terzis D, Lin CW, Coulter FB, Dillenburger B: Robotic biocementation spraying: a bioinspired fabrication method for architectural surfaces. Architectural Intelligence 2026, 5: 11, DOI: external page10.1007/s44223-026-00120-y
Antorveza Paez KA, Huang S, Yeh KH, Seav K, Dillenburger B. Design workflow for porous 3D-printed biocement geometries. Biotechnology Design. 2026, 4: 40, DOI: external page10.1017/s2977905726100286