Abstract
The effect of Bacillus pumilus (B. pumilus) on the improvement potential of some selected geotechnical properties of lateritic soil was studied. Air-dried soils were cured in paced Bacillus pumilus suspensions between 0 and 2.4 × 109 cells/ml. Cured test samples adopted mix ratios of 50% B. pumilus / 50 % cementation reagent(50 % B – 50 % C) for sample A and 25% B. pumilus / 75 % cementation reagent(25% B – 75% C), for sample B, all conforming to the liquid limit of the soil. The geotechnical properties of the lateritic soil showed different levels of improvement with increasing B. pumilus suspension densities. The specific gravity generally diminished with rise in B. pumilus suspension from 2.55 for the natural soil to 2.33 and 2.26 at 2.4 × 109 cells/ml for samples A and B, respectively. The cation exchange capacity (CEC) decreased from 26.6Cmol/kg for the natural soil to 8.7Cmol/kg at B. pumilus suspension of 1.8 × 109 cells/ml. The Atterberg Limits of lateritic soil specifically, plasticity index (PI) decreased from 19.0% and 29.1% for the natural and control lateritic soil to values of 6.2 and 8.9 % for samples A (50 % B – 50 % C) and B (25% B – 75% C), respectively, at optimal B. pumilus suspension density of 2.4 × 109 cells/ml, Sample B (25 % B – 75% C) recorded a better improvement in terms of the plasticity of the treated soils
Keywords
Publication details
- DOI
- 10.53540/tjer.vol21iss2pp105-113
- Journal
- The Journal of Engineering Research, 21(2), 105-113
- Publisher
- Sultan Qaboos University
- Open access
- Gold open access
- License
- CC BY-ND 4.0
Cite this article
APA 7
Nwaedozie, U., Osinubi, K. J., Eberemu, A. O., & Yohanna, P. (2025). INFLUENCE OF BACILLUS PUMILUS ON THE PLASTICITY OF TREATED LATERITIC SOIL. The Journal of Engineering Research, 21(2), 105-113. https://doi.org/10.53540/tjer.vol21iss2pp105-113
MLA 9
Nwaedozie, U.E, et al. "INFLUENCE OF BACILLUS PUMILUS ON THE PLASTICITY OF TREATED LATERITIC SOIL." The Journal of Engineering Research, vol. 21, no. 2, 2025, pp. 105-113. https://doi.org/10.53540/tjer.vol21iss2pp105-113.
Chicago (author–date)
Nwaedozie, U.E, Kolawole J. Osinubi, Adrian Oshioname Eberemu, and Paul Yohanna. 2025. "INFLUENCE OF BACILLUS PUMILUS ON THE PLASTICITY OF TREATED LATERITIC SOIL." The Journal of Engineering Research 21 (2): 105-113. https://doi.org/10.53540/tjer.vol21iss2pp105-113.
Harvard
Nwaedozie, U., Osinubi, K. J., Eberemu, A. O. and Yohanna, P. (2025) 'INFLUENCE OF BACILLUS PUMILUS ON THE PLASTICITY OF TREATED LATERITIC SOIL', The Journal of Engineering Research, 21(2), pp. 105-113. doi:10.53540/tjer.vol21iss2pp105-113.
Vancouver
Nwaedozie U, Osinubi KJ, Eberemu AO, Yohanna P. INFLUENCE OF BACILLUS PUMILUS ON THE PLASTICITY OF TREATED LATERITIC SOIL. The Journal of Engineering Research. 2025;21(2):105-113. doi:10.53540/tjer.vol21iss2pp105-113
IEEE
U. Nwaedozie, K. J. Osinubi, A. O. Eberemu, and P. Yohanna, "INFLUENCE OF BACILLUS PUMILUS ON THE PLASTICITY OF TREATED LATERITIC SOIL," The Journal of Engineering Research, vol. 21, no. 2, pp. 105-113, 2025, doi: 10.53540/tjer.vol21iss2pp105-113.