Experimental concrete that patches up cracks by itself is to undergo outdoor testing.
The concrete contains limestone-producing bacteria, which are activated by corrosive rainwater working its way into the structure.
The new material could potentially increase the service life of the concrete - with considerable cost savings as a result.
The work is taking place at Delft Technical University, the Netherlands.
It is the brainchild of microbiologist Henk Jonkers and concrete technologist Eric Schlangen.
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