Bacterial concrete
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The document discusses the technique of bacterial concrete, which uses microbially induced calcite precipitation (MICP) to remediate cracks and fissures in concrete. MICP is a type of biomineralization that uses certain bacteria, like Bacillus pasteurii, to precipitate calcite and seal cracks. The preparation process involves growing bacteria in a nutrient broth, then adding it to the concrete. Experimental testing showed bacterial concrete has improved compressive strength, freeze-thaw resistance, permeability, and corrosion resistance compared to regular concrete. However, bacterial concrete is more expensive and the bacteria may not grow well in all environments.
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