AN EXPERIMENTAL STUDY OF SELF HEALING CONCRETE WITH BACILLUS BACTERIA & PARTIAL REPLACEMENT OF CEMENT

Abstract

Porous within concrete reduces its strength and durability. By eliminating porosity extra strength
and durability can b achieved. An advanced technique for filling the pores in concrete is by utilizing
bacteria, i.e. microbiologically induced calcite (CaCo3) precipitation. Microbiologically Induced Calcite
Precipitation (MICP) is a technique that comes under a broader category of science called bio
mineralization. MICP is highly desirable because the calcite precipitation induced as a result of microbial
activities is pollution free and natural. Here Bacillus Megaterium is used for calcite (CaCo3) precipitation.
To support the growth of bacteria, fine aggregate is replaced with fly ash. As a result, the density of concrete
was reduced and an increase in strength and durability was observed