Concrete that can grow and heal itself

Franken-concrete comes to life to create self-healing buildings.

A team of American researchers has developed a new kind of biological concrete that could redefine what we mean by “green buildings.”

The concrete, developed by researchers at the University of Colorado, Boulder, uses bacteria as a binder. This leads to a material that can grow and even heal itself — much like a living organism.

An arch made from living building materials, next to the bacteria used to make it. (CU Boulder College of Engineering & Applied Science)

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In traditional concrete, sand and aggregate are bonded together with cement.

In this biological concrete, photosynthetic cyanobacteria take the place of cement. The bacteria use carbon dioxide from air to produce a material similar to limestone that glues together sand particles, making robust building blocks.

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