Performance of Bacillus Cohnii Added Microbial Concrete

Abstract

In the era of rapid urbanization, concrete has been playing a very important role in construction industry but inherently, it is very much vulnerable to formation of cracks, due to which its durability gets decreased. If immediate action is not taken, cracks developed in the section may spread further and increase the cost of repair. In concrete structures, these cracks become an easy path of entry for water, oxygen and carbon dioxide resulting into the decrease in durability of concrete. Numerous researches around the world are on to heal this defect with the help of addition of various bacteria in the form of Bacterial Concrete. This study aims to find out the change in salient properties of concrete experimentally after adding the microbes. Concrete cubes were cast with different bacteria concentrations, tested for salient properties after 7 and 28 days. Test results reveal that addition of bacteria results into increase in compressive strength and decrease in water absorption and porosity of concrete. Findings also indicate that the concrete mix with higher bacteria concentration gives higher compressive strength and lower water absorption and porosity in concrete.