This investigation experimentally deals with the crack healing ability of bacteria, like a small cut in our body can be healed by a simple treatment. The cracks in the concrete is the major problem in construction industry. The repair of cracks is usually carried out by means of some kind of human intervention. As regular and manual maintenance of cracks repair in construction industry is costly and in some cases not at all possible. To solve this problem, insertion of bacteria can be highly favorable as it could both reduce maintenance and increase the durability of concrete. In this study a specific group of alkali resistant spore farming bacteria Bacillus Substilis were selected and added in different proportions with silica gel and calcium carbonate in a glass tube and is kept in the concrete during casting. The M20 grade concrete was used. The cube and cylinder specimens were tested for compressive and split tensile strength test up to the initial cracks at the age of 7, 14 and 28 days. The optimum quantity of bacteria was found from the test results. Beam specimens were casted for the optimum mix and tested for flexural behavior. The Load carrying capacity, Energy absorption capacity, Stiffness and Ductility characteristics of Self-Healing Concrete beam were found and compared with the conventional concrete beam. The test results shows Self-Healing Concrete beam attained higher load carrying capacity, energy absorption capacity and deflection and lesser stiffness and ductility when compared to the conventional concrete beam.

Self-Consolidating Concrete (SCC) is one of "the most revolutionary developments" in construction industry. This concrete is able to flow and fill the most restricted places of the form work without vibration. The Self-Consolidating Concrete is a high performance concrete which is more consistent. To enhance the strength of Self Consolidating Concrete, Silica Fume is added, which is much finer than the cement. Alkali Resistance Glass Fibre is relatively a new construction material, which is used in SCC to increase the tensile strength of concrete. For appropriate workability, Super Plasticizer (SP) and Viscosity Modifying Agent (VMA) are added to reduce segregation of the aggregate.. Self-Consolidating concrete has identical quality, with the use of VMA and Super Plasticizer. The cost of SCC is much higher than the Conventional Concrete. The cost of materials for SCC is greater about 10-15%, when compared to materials for Conventional Concrete. But, It is economical like, savings in rate of labour, rate of pouring and rate of repair work etc., In this study 6%, 12% & 24% of Silica Fume and 0.5% of Glass Fibre by the weight of cement are added in concrete to enhance the possessions of Self Consolidating concrete. Alkali Resistant Glass Fibre with a filament length of 12 mm diameter of 14 microns, and an aspect ratio of 857 is used. In this experimental work, M30 grade of concrete is taken to determine the compressive strength, split tensile strength and flexural strength of Self Consolidating Concrete with the optimum percentage of Silica Fume, Glass Fiber, Super Plasticizer and VMA.