Combined Effect of Relative Density and Calcium Carbonate Content on Drained Triaxial Behaviour of Bio-cemented Sand
Combined Effect of Relative Density and Calcium Carbonate Content on Drained Triaxial Behaviour of Bio-cemented Sand
Bio-cementation of soil is a promising technique recently used to address a wide range of geotechnical engineering problems. In this study, bio-cementation in sand samples has been initiated through the bacteria Sporosarcina pasteurii using the premixing and injection methods. Monotonic drained triaxial tests (CD) have been performed to study the effect of initial sand density on the strength improvement due to bio-cementation. The loose, medium dense, and dense samples were also investigated with respect to the homogeneity of the calcium carbonate content distribution. The results showed that, regardless of the initial density, peak deviatoric stress increased with calcium carbonate content. Below a cementation degree of about 7%, peak stress was higher for the dense initial state, while above that cementation level, it was higher in case of a loose initial state. In addition, the repeatability of the resulting strength under similar bio-cementation conditions was demonstrated.
Jude Zeitouny; Wolfgang Lieske; A. A. Lavasan; T. Wichtmann
2025 International Conference on Bio-mediated and Bio-inspired Geotechnics (ICBBG2025)
General session: Fundamental research on biogeotechnics
https://doi.org/10.53243/ICBBG2025-29
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