A study on strength and self-healing characteristics of Bacterial concrete
Citation
Ms.B.Arthi, Ms.K.K.Dhaarani"A study on strength and self-healing characteristics of Bacterial concrete", International Journal of Engineering Trends and Technology (IJETT), V38(3),121-127 August 2016. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
Abstract
Concrete plays a vital role as a
construction material in the world. This project
presents the results of an experimental investigation
carried out to evaluate the influence of Bacillus
Subtilis and Bacillus Licheniformis on the
compressive strength, split tensile strength, flexural
strength, water absorption and its self-healing
properties. An attempt is made to heal these cracks by
the addition of the bacteria in the concrete and also to
increase of the strength of the concrete. Each bacteria
of concentration 105 cells/ml are added. Tests were
performed at the ages of 7, 14 and 28 days. The
applicability of specifically calcite mineral
precipitating bacteria to fill the cracks in concrete
and the bacteria chosen must have the self-healing
capacity and the bacteria used must be nonpathogenic
and sustainable. It is found that the cracks
in the concrete have been healed and the formation of
calcite precipitation is observed using Scanning
Electron Microscopy (SEM). Usage of bacteria like
Bacillus Subtilis, Bacillus Licheniformis improves the
strength and durability of concrete through selfhealing
effect.
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Keywords
Bacillus Subtilis, Bacillus Licheniformis,
SEM.