Behaviour of Bacterial Concrete as Self Healing Material

The major problem the construction industry concurs with is the high maintenance cost of the concrete. Various natural processes such as weathering, faults, land subsidence, earthquake, changes in moisture and temperature, have the tendency to create cracks in concrete. Therefore, to counter these effects, it has become necessary to come up with ways which will not only help in counteracting but also in improving the quality of concrete. In the present experiment, Bacillus Pasteurii, which has the property of bio calcification and can secrete calcium carbonate as an extracellular product has been used to prepare M25 concrete. This product is found to be responsible for filling the pores and cracks internally making the structure more compact and resistive to seepage. Also, laboratory investigations were carried out to compare the different parameters of bacterial concrete with ordinary concrete and concrete in which cement was partially replaced with Fly Ash and GGBS. Keywords-Bacillus Pasteurii, Bacterial concrete, self healing concrete, Fly-Ash concrete, GGBS concrete etc