Variation of Strength Parameters of Bacterial Concrete with Different Cell Concentration

Generally concrete is a prime material of construction for many of infrastructures like hydraulic structures, highways, and buildings. Cracks I n concrete are inevitable as the phenomenon of formation of micro cracks in concrete is common. This causes degradation of strength properties of concrete and also causes corrosion of reinforced members and subsequently decreases the ability of structure. Self - healing technique should be adopted to overcome such situations. It is simple to seal micro cracks with bio-mineralization technique. Freshly formed micro pores can be sealed up with help of calcium carbonate precipitation of bacteria. In this study, the calcifying bacteria E.coli is induced in concrete as self - repairing agent in different cell concentrations. The bacteria are introduced in concrete along with liquid media of nutrient broth. The strength parameters of bacterial concrete with variation in cell concentration of bacteria along with 40% M-Sand substitution by weight to natural sand are determined and results are compared with strength parameters of normal concrete.