The comparison of the experimental investigations of strength characteristics of conventional and bacterial concrete

Abstract

Conventional concrete (CC) is the greatest used construction material in the world, especially in aggressive environments. This is due to the element's size and shape. The world's consumption of concrete is on the order of 5.5 billion metric tons a year. The advancement of concrete technology, as well as the development of materials and mechanisms, has resulted in increased strength needs. Maintenance, repair, and rehabilitation of present concrete structures challenge a lot of difficulties, resulting in significant expenditure. Concrete is vulnerable to microcracks creation and has extremely undesirable pores. Hence, there is an urgent need to pay more attention to improving the properties of concrete in terms of strength. The effective remedy for the closure of cracks is Bacterial concrete (BC) which will constantly be in concrete and this phenomenon is called Microbiologically Induced Calcite Precipitation (MICP). The urease enzyme enables the deposition of calcium carbonate (CaCO3) with the advantage of bacteria. The bacterial remediation technique exceeds added techniques. The examinations were carried out with variety an of quantitative evaluations of the optimal concentration of bacterial cells to be collected in concrete. Based on the state-of-the-art evidence obtainable in the literature, in these existing soundings two different bacterial illustrations specifically Bacillus Megaterium (BM) and Bacillus Subtilis (BS) are measured in concentrations of 104, 105, and 106 cells/ml of mixing of water. The optimum amount of cell concentration of bacteria is created to be 104 cells/ml for BM and 105 cells/ml for BS based on the results of compressive strength. This investigation is carried out on strength-related properties such as compressive strength, splitting tensile strength, and flexural strength. It is determined that BM and BS bacteria can be firmly used for refining the performance and strength characteristics of concrete.