DURABLE ASPECT OF BACTERIAL CONCRETE

Be known that concrete has the major building material largely used in building construction, and it has a large limitation with respect to their durability aspects. Detoriation a big reason through cracks, initialized due to various mechanisms just like shrinkage, freeze and thaw action. In addition of the mechanical properties as compressive strength, permeability, Elastic Modulus, flexure and split tensile strength etc., has to lead to the failure of the respective structure. As for enhancing the performance of concrete Bio-Mineralization a new method in concrete is evolved, the calcite precipitating spore forming bacteria or microbiologically induced calcium carbonate (CaCo3) precipitation (MICCP) has been use now a days. In 1835 the bacteria has originally name vibrio Subtilis, and has renamed in 1872 as Bacillus Subtilis. Bacillus Subtilis also has more names including Bacillus Uniflagellatus, Bacillus globigii and Bacillus natto. According to the past investigation it has been framed out that the Bacillus Subtilis with a Concentration of 105 cells/ml at 35 0 C gives better result in strength parameters. It has also been noted down that conventional concrete and self-compacting concrete (SCC) has the property of healing the minor cracks of concrete in initial stage, but the bacterial self-compacted concrete up to 40mm depth with crack width 0.52mm has reduces crack width up to a level of 0.18mm at 21 days has been recorded.