AN EXPERIMENTAL INVESTIGATION ON THE STRENGTH PROPERTIES OF FLY ASH BASED BACTERIAL CONCRETE
Journal Title: International Journal of Innovative Research in Advanced Engineering - Year 2016, Vol 0, Issue 0
Abstract
The present investigation deals with the influence of Bacillus Subtilis bacteria on strength properties of fly ash concrete. In fly ash concrete, cement was partially replaced with 10%, 20% and 30% with fly ash by weight and optimizes the percentage of fly ash for making bacterial concrete. The bacteria Bacillus Subtilis of different cell concentrations 103, 105 and 107 cells/ml were used for making bacterial concrete. The experimental investigations were carried out for 28 and 56 days. Tests conducted include Compressive strength, Split tensile strength, Flexural strength and Ultrasonic Pulse Velocity. In fly ash concrete, maximum strength properties observed for 10% replacement of cement with fly ash and the percentage of fly ash is fixed as 10% for making bacterial concrete. In bacterial concrete, maximum strength properties obtained for the bacteria cell concentration of 105 cells/ml. The improvement in the strength properties of fly ash concrete is due to the precipitation of calcium carbonate (CaCO3) in the micro environment by the bacteria Bacillus Subtilis.
Authors and Affiliations
Chithra P Bai, Shibi Varghese
Keywords
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