Published Paper Details:

One effective remedy for closure of cracks is the Bacterial Concrete (BC) which will continuously deposit calcite in concrete. This, phenomenon is called as Microbiologically Induced Calcite Precipitation (MICP). The urease enzyme enables the deposition of calcium carbonate (CaCO3) with the help of bacteria. The bacterial remediation technique surpasses other techniques as it is bio-based, eco-friendly and durable. Bacteria need to offer resistance to withstand high pH of concrete and mechanical stresses during mixing. In this paper, investigations are also carried out on durability-related properties such as saturated water absorption, porosity, sorptivity, permeability, acid resistance, sea water resistance, impact strength, rapid chloride penetration, corrosion resistance and alkalinity measurement of M20 grade of Bacterial concrete trial mixes. The results of the investigations demonstrate the superior durability characteristics of bacterial concrete. Based on the results obtained, it is understood that due to the inclusion of bacteria in concrete the durability of concrete can be enhanced. That is, bacteria can effectively be used to repair cracks. It is concluded that BM, BS and PA bacteria can safely be used for improving the performance of strength and durability characteristics of concrete. However, all the three bacteria increase the strength of concrete to a certain level only. BM bacteria is found to be more effective than BS and PA in strength and durability properties. The details of the investigations along with the results are presented.