Strength and Durability of Concrete by Bacterial Power as Replacement

Abstract

Concrete is the foremost building material broadly used in construction of building, but concrete cracks are inevitable and are one of the inherent shortcomings of concrete. The major downside of concrete is its low tensile strength due to occurrence of micro crack when the load applied is more than its limit and this paves way for the seepage of water and other salts. This instigates corrosion and causes the whole structure endangered and leads to the non-performance of structure. To predict this type of failure due to cracks and narrow openings, a bio mineralization approach in concrete has evolved in recent years. The present work is focused on a naturally occurring spore-forming bacterium i.e., Bacillus sphaericus which is isolated from soil is used in concrete to carried out the compressive and split tensile strengths of bacterial inclusive concrete with different percentages as  0ml, 10ml, 20ml and  30ml for M25 grade concrete. Among the different dosages, the strength and durability properties yield better results for 30ml bacterial powder as compared with normal concrete.