Scientists have found that some bacteria and fungi can produce minerals

But adhesive chemicals often behave very differently from concrete,and over time, these adhesives can lead to even worse cracks.So perhaps the best way to heal large cracks is to give concrete the tools to help itself.Scientists have discovered that some bacteria and fungi can produce minerals,including the calcium carbonate found in autogenous healing.Experimental blends of concrete include these bacterial or fungal spores alongside nutrients in their concrete mix,where they could lie dormantfor hundreds of years.