Published Paper Details:

This study presents the design and evaluation of Bacteria Induced Calcium Carbonate Precipitation (BICP) for self-healing concrete in high-rise buildings. Cracks in concrete compromise structural durability, safety, and increase maintenance costs, especially in inaccessible high-rise structures. BICP utilizes Bacillus subtilis bacteria capable of precipitating calcium carbonate (CaCO?) within cracks, restoring mechanical integrity and reducing permeability. Optimal bacterial concentrations were determined by varying cell counts (100 to 10? cells/ml) across M20, M25, and M30 concrete grades. Concrete mixes containing 10? cells/ml demonstrated significant improvements in compressive strength (25% for M20, 21% for M25, and 22% for M30), split tensile strength, flexural strength (up to 27.07%), ultrasonic pulse velocity, and reduced Cantabro loss by 15-25%. XRF analysis confirmed the formation of CaCO? precipitates within healed cracks, validating the self-healing mechanism. BICP offers a sustainable, long-term crack repair strategy, enhancing durability and reducing environmental impact in modern construction.