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Optimum concentration of Bacillus megaterium for strengthening structural concrete
- Authors
- Andalib, Ramin; Abd Majid, Muhd Zaimi; Hussin, Mohd Warid; Ponraj, Mohanadoss; Keyvanfar, Ali; Mirza, Jahangir; Lee, Han-Seung
- Issue Date
- Aug-2016
- Publisher
- Elsevier BV
- Keywords
- Bacillus megaterium; Calcite precipitation; Bacterial concrete; Strength; Micro-structural analysis
- Citation
- Construction and Building Materials, v.118, pp.180 - 193
- Indexed
- SCIE
SCOPUS
- Journal Title
- Construction and Building Materials
- Volume
- 118
- Start Page
- 180
- End Page
- 193
- ISSN
- 0950-0618
- Abstract
- Five different cell concentrations of Bacillus megaterium (10 x 10(5) to 50 x 10(5) 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 x 10(5) 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. (C) 2016 Elsevier Ltd. All rights reserved.
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Related Researcher
- Lee, Han Seung
- ERICA 공학대학 (MAJOR IN ARCHITECTURAL ENGINEERING)