Abstract
Conventional concrete has a fault, that it is subjected to cracking during tension. The cracks that appear on concrete surface permit the liquids to penetrate inside and cause decay of concrete structures. As renovation and restoration of concrete structures are time consuming, costly and a challenging issue, self healing concrete overcomes the issue by healing the cracks on the concrete surface. This concrete has eco-friendly in nature and seals the inner portion of cracks by releasing calcium carbonate. The main objective of this paper is to indicate the rate of crack healing using biological agents to enhance the impermeable nature of concrete. The mechanical and durability tests are conducted to compute the rate of self healing in concrete. The study reveals that bio concrete mixes after 28 days of curing attained an improvement in compressive strength of 22%, split tensile strength of 16% and flexural strength of 11% compared to conventional concrete. The dense nature of concrete has examined by ultrasonic pulse velocity values. Sorpitivity and water absorption tests assessed the durability properties of both conventional and bacterial concrete samples, for which presence of bacteria enriched durability properties of bacterial based concrete specimens.
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