MECHANICAL PROPERTIES OF BACTERIAL CONCRETE BY PARTIALREPLACEMENT OF CEMENT BY NANO SILICA IN DIFFERENTGRADES OF CONCRETEKodavati Divya Bharathi, Dhondy Rupesh Kumar, Polapali Saikiran and Belli KarthikAbstract Concrete with nano-silica also has a higher strength compared with normal concrete. In the current study,an examination of the mechanical characteristics of bacterial concrete containing nano-silica is conducted.The impact of concrete was examined in this study employing Bacillus subtilis for self-Healing MicrobialType Culture Collection (MTCC) Strain no.121, Among the bacteria concentrations of 104, 105, and 106 cells/ml, a concentration of 105cells/ml gives more strength, so further investigation is done using 105 cells/mlcell concentration for different percentages of nano-silica is examined. Firstly, Bacterial cell concentration isoptimised. Each of the 40 sets of cubes (150 mm x 150 mm x 150 mm), cylinders (150 mm diameter and 300mm height), and prisms (100 mm x 100 mm x 500 mm) are cast and tested at 28 days and 90 days as part offurther research to determine the mechanical properties of bacterial concrete with different percentage ofnano silica with and without bacteria. It has been noted that adding nano-silica to concrete increases itsstrength from 0% to 1.5% before being decreased to 2%. concrete splintering occurs due to a number ofcauses, including mechanical compression and low tensile strength, shrinkage, freeze-thaw reaction, andothers. External loads can cause high tensile strains. For any combined nano-silica percentage when comparedto regular concrete, bacterial concrete is stronger. |