A REVIEW ON BACTERIA BASED SELF-HEALING CONCRETE

Concrete is the utmost sorted and vital component in construction because of its low price, easy availability of constituent materials and has strong compression strength. The downside of concrete is it’s weakness in withstanding tension, which leads to cracks inside the systems. Cracks permit water in the concrete and cause decay of the iron steel bar. Cracks are primary weaknesses of concrete which finally leads to structural failure. To prevent such, frequent maintenance and the use of artificial synthetics may be used for improvement however, they are costly and additionally not environment friendly. In current years MICCP (microbiologically induced calcium carbonate precipitation) by microorganismis considered as an environment conservation and preservation approach that increases the properties and repairs the matrix. The use of self-recuperation concrete has developed lately, in improving the overall behaviour of concrete, a calcium carbonate precipitating and sporulating bacteria is incorporated into concrete. As water ooze through the cracks, it helps the bacteria precipitate calcium carbonate as a by product, which fills the cracks (self-healing). Therefore, research is embarked on to discuss bacterial in concrete, it's kinds, benefits and downside of bacterial use in concrete and application with the help of previous journals and assessment of bacterial concrete durability. The bacterial calcite precipitation was examined with the aid of X-ray diffraction (XRD)and envisage with Scanning Electron Microscope (SEM).