No matter how carefully the concrete is mixed or reinforced, there is inevitable process of cracking in all types of concrete. If the cracks are really large, they may lead to corrosion of the steel reinforcement, that gives unattractive look and affects the construction?s mechanical properties. Henk Jonkers of the Delft University Of Technology, in Netherlands is working of the concrete healing process and was created this impressive self healing concrete.  There are used bacterias in this bio concrete and when the crack appears and when the water gets into the cracks, the bacteria is activated and produces limestone which fills the cracks. This is impressive, right"

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