Optimum concentration of Bacillus megaterium for strengthening structural concrete
Five different cell concentrations of Bacillus megaterium (10 × 105 to 50 × 105 cfu/ml) were introduced in structural concrete to achieve the optimum concentration of bacteria. The significant increase in the strength was obtained in the case of 30 × 105 cfu/ml at different ages. The strength of hig...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Published: |
Elsevier Ltd
2016
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/72198/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-84966738310&doi=10.1016%2fj.conbuildmat.2016.04.142&partnerID=40&md5=4e0c3e7c78845b1c00c7b00bd12d673c |
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| Institution: | Universiti Teknologi Malaysia |
| Summary: | Five different cell concentrations of Bacillus megaterium (10 × 105 to 50 × 105 cfu/ml) were introduced in structural concrete to achieve the optimum concentration of bacteria. The significant increase in the strength was obtained in the case of 30 × 105 cfu/ml at different ages. The strength of highest grade of bacterial concrete had improved (24%) as compared to lowest grade (12.8%) due to calcification mechanism. Microbial calcite precipitation was quantified using X-ray diffraction analysis, visualized by scanning electron microscopy and analyzed by energy dispersive spectrometer. It was found that the optimum concentration of B. megaterium had a positive effect on high strength structural concrete. |
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