Abstract: Cracks formed in concrete are inescapable and are one of the major reasons for the weaknesses of concrete.. The Purpose of present research work is to promote sustainable development for repairing cracks formed in concrete. Various researches have shown positive results by adding CaCo3 precipitating bacteria in concrete, also known as bacterial concrete or self-healing concrete. This research is dedicated to check the suitability of mixing these self-healing CaCo3 depositing bacteria with concrete in order to increase the compressive strength of concrete, reduce its permeability and seepage of water by bio-mineralization process. Considerable increase in strength is observed in concrete specimens when casted with bacterial solution. The study has discovered methods or ways to test the effect of use of bacteria in concrete. Tests on concrete with various combinations of bacterial solution as well as varied percentage of bacterial solution have been conducted. Results have been compared with conventional concrete. Biological modifications of construction materials are the need of the hour for strength improvement and long term durability. The present study propose to Increase compressive, tensile strength and self healing for concrete

Keywords: Bacteria, Bacillus Subtilis, Self- healing, durability.

| DOI: 10.17148/IARJSET.2021.85100