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Study of Bacterial Concrete's Behavior

Rahul Kumar Sharma

Abstract


Cracking in concrete structures frequently causes deterioration much earlier than the intended service life. Because it is frequently very difficult to gain access to the structure in order to make repairs, particularly if they are underground, repairs can be particularly time-consuming and costly. Self-healing technologies, in particular, have a lot of potential as a new way to fix cracked concrete. Self-healing is a natural process that can take place in the presence of moisture and can be used to repair cracks in concrete. Utilizing a variety of components, such as bacteria, fibers, and mineral admixture, can speed up concrete's ability to heal itself. As a method for self-healing concrete cracks, mineral admixtures have been used to reduce the water permeability of damaged concrete. When water is present, mineral admixture—expansive agents and geomaterials—swell to fill the cracks. As a result of concrete self-healing, the mechanical properties of the concrete are recovered by the fibers in the concrete, which also aids in controlling the tight crack width. The bacteria in the bacteria additive self-healing approach cause calcium carbonate precipitation as a result of carbonate generation by bacteria metabolism in a calcium-rich environment. The larger cracks are filled in by calcium carbonate precipitation. By lowering the amount spent on repairs and maintenance, self-healing concrete significantly extends a building's service life. As a result, self-healing concrete might be a key technology that makes it easier to build a sustainable civil infrastructure.

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References


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