Experimental investigation on mechanical properties and characterization of steel fibre concrete with Bacillus subtilis

Building cracks spoil the aesthetic view of the structure along with degrading the strength of the structure. It leads to the failure of the structure as a whole. Propagation of cracks in the concrete surface increases the chance of permeability due to moisture content in the atmosphere which might...

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Bibliographic Details
Published in:E3S Web of Conferences 2023-01, Vol.387, p.3002
Main Authors: Damodaran, Pooja, Thangasamy, Lakshmi
Format: Article
Language:English
Subjects:
Bacillus subtilis
Bacteria
bacterial concrete
Calcium carbonate
Compression
Compressive strength
Concrete
Crack propagation
Cracks
Fatigue cracks
Fatigue failure
Fatigue life
Fiber reinforced concretes
Flexural strength
Image compression
Materials fatigue
Mechanical properties
Moisture content
Moisture effects
Permeability
reinforcements
Reinforcing steels
Self healing materials
self-healing,cracks
Steel fibers
steel fibre
Tensile strength
Water content
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Summary:Building cracks spoil the aesthetic view of the structure along with degrading the strength of the structure. It leads to the failure of the structure as a whole. Propagation of cracks in the concrete surface increases the chance of permeability due to moisture content in the atmosphere which might corrode the internal reinforcements. To overcome this situation, a solution in the form of fibre-reinforced self-healing concrete was suggested in this research work. Steel fibre was added by varying 0%,1%,2%,3%,4% and 5% interms of volume of concrete to prolong fatigue life and decrease the crack width under fatigue loading. Bacteria ( Bacillus subtilis ) are used to heal the cracks by producing calcium carbonate (CaCO3) as a result. Bacterial concrete with fibre (BCF) was cast by M30 mix as per Indian Standard Code. Studied concrete's mechanical and microstructural properties like compression strength test, flexural strength test, split tensile strength test, SEM images, EDS, XRD and FTIR methods. From microstructural studies, it is clear that there is sufficient self-healing material in broken concrete, hence the efficiency of BCF's self-healing property is commendable and the ability of the generated BCF concrete to regain strength.
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/202338703002