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Mechanical Properties of Bacterial Concrete Using Fly Ash as Partial Replacement

Author(s):

B Sandeepkumar Reddy , LORDS COLLEGE OF ENGINEERING AND TECHNOLOGY; Mohammed Safiuddin, LIET

Keywords:

Bacterial Concrete, Fly Ash, Bio Mineralization, Calcite

Abstract

The concrete structures deteriorate in contact with the surroundings which lead to an irreversible damage and ultimately reducing the strength of the structure. The characteristics of pore structure of concrete have a direct influence on its durability. One way to circumvent costly manual maintenance and repair is to incorporate an autonomous self -healing mechanism in concrete. One such alternative repair mechanism, i.e. a novel technique based on the application of bio mineralization of bacteria in concrete. The present experimental investigation is carried out to study the mechanical properties of concrete by using of bacillus odeysseyi which would make it, self-healing. The bacteria present in the concrete rapidly sealed freshly formed cracks through calcite production. The bacterial concentrations were optimized to 105cells/ml. The percentage replacement of fly ash was by weight of cement. The percentage use of fly ash was 10%, 20% with bacteria was used. The experiments were carried out to evaluate the effect of Bacillus odysseysi on the compressive strength, Tensile strength test and Flexural test for 7, 14, 28 days. The test results indicated that inclusion of bacillus odeysseyi enhanced the compressive strength (i.e., 49.85 N/mm2) for 10% fly ash replacement, reduced the porosity and permeability of the concrete with fly ash.

Other Details

Paper ID: IJSRDV4I90013
Published in: Volume : 4, Issue : 9
Publication Date: 01/12/2016
Page(s): 19-22

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