/ bio-cement
Growing molecular reads
Bio-cement, the stone left behind by a living process
How bacteria turn loose sand into a solid without a kiln, and why the stone outlives the cells that laid it. Plus the ammonia, which comes with it.
MATTER
05/07
start here
Bio-cement, from the molecule up
Urease, urea, calcium. The death test answers twice here, because the product is a plain mineral and the making needs something alive.
Foundational · Molecular · Framework
The rest of the shelf
02
Urease, and the mineral in the gaps
Feed urea and calcium, urease transforms one, calcite drops out between the grains. The glue is a mineral you could dig up, which is why the stone stops needing the bacteria.
MOLECULAR · structure
Date TBC, 2026
Reading · 13 min
03
Hard at the edge, weak in the middle
How the solution travels through packed grains, and why it sets where it enters and gives up further in. A good tray and a good wall are different problems.
MOLECULAR · fabrication
Date TBC, 2026
Reading · 15 min
04
The bacteria you leave inside the wall
Self-healing concrete keeps dormant cells in the mix, waiting for water. A living process held on standby, and what standby asks of you.
MOLECULAR · lifecycle
Date TBC, 2026
Reading · 14 min
Molecules Covered
urease
urea
calcium carbonate
Glossary
Read next
The single cell that finds its way through a maze, and the molecular signals that move it. Meet the next on its own terms.. Meet the next on its own terms.
