EXPRIMAENTAL STUDY OF MICROBIAL CONCRETE

Abstract

Concrete is an absolutely essential component of construction materials used in infrastructure and most Buildings. Despite its versatility in construction, it is known to have several limitations. It is weak in tension, has limited ductility and little resistance to cracking. Based on the continuous research carried out around the globe, various modifications have been made from time to time to overcome the deficiencies of cement concrete. The corrosion of the concrete is caused by the interaction between biological and chemical processes. Microbial concrete has emerged as a novel technique in recent years. It can be used for various purposes, amongst which remediation of cracks in concrete is the primary one. Due to microbial activities of the bacteria, microbiologically induced calcite precipitation (MICP), a highly impermeable calcite layer is formed which contributes to increase the performance of concrete structure and also has excellent resistance to corrosion. Hence this technique being environmental friendly can be used as their substitute. It was also observed in the study that the metabolic activities in the microorganisms taking place inside the concrete results into increasing the overall performance of concrete including its compressive Strength and Durability.