Self-healing concrete is a concrete that contains a self-healing component which behaves as an immediate agent for repairing injuries on constructions made of concrete. I focused on the process of biomineralization and the formation of calcium carbonate as the method which prolongs the durability and firmness of structures. After minor cracks are formed in the concrete, the action of bacteria previously mixed into the concrete allows the formation of a precipitate that fills the crack again. A sample that contained the bacteria was prepared, immersed into water and observed for 28 days. The appearance and growth of calcium carbonate precipitation was followed during this period. The process was descriptively and visually evaluated and images were taken with an optical as well as scanning electron microscope. The process was successful; calcium carbonate precipitation appeared and filled the cracks of the samples, as expected.
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