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Effect of Ureolytic Bacteria on Compressibility of the Soils with Variable Gradation Cover

Effect of Ureolytic Bacteria on Compressibility of the Soils with Variable Gradation

Architecture, Civil Engineering, Environment
Volume 16 (2023): Issue 3 (September 2023)
By: Mariola Wasil,  Urszula Wydro and  Elżbieta Wołejko  
Open Access
|Oct 2023

Figures & Tables

Figure 1.

Grain size distribution curves of tested materials

Figure 2.

The process of biomineralization in a flask: a) bacterial solution, b) bacterial solution right after CaCl2-urea solution added, c) calcite crystals precipitated at the bottom of the flask, where bacterial solution and cementation solution were mixed (after a few days of storing at room temperature)

Figure 3.

Results of oedometric tests of: a) untreated fine sand (FSa), b) fine sand (FSa) improved with the MICP method

Figure 4.

Results of oedometric tests of: a) untreated fly ash (FA), b) fly ash (FA) improved with the MICP method

Figure 5.

Results of oedometric tests of: a) untreated silt (Si), b) silt (Si) improved with the MICP method

The parameters of tested soils

MaterialD50 (mm)ρs (g/cm3)Ip (%)
Silt (Si)0.0312.677.7
Fine sand (FSa)1.902.65–
Fly ash (FA)0.0602.18–

Chemical and phase composition of tested fly ash (FA)

Phase-mineral composition (%)Chemical composition (%)
SiO243.28Si22.37
Al2O331.81Al15.80
Fe2O31.82C3.49
CaO1.10K2.46
MgO2.16Fe1.87
K2O3.42Mg0.97
TiO20.63Ca0.81
LOI12.45Ti0.56
DOI: https://doi.org/10.2478/acee-2023-0040 | Journal eISSN: 2720-6947 | Journal ISSN: 1899-0142
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Language: English
Page range: 131 - 139
Submitted on: Apr 5, 2023
|
Accepted on: Apr 25, 2023
|
Published on: Oct 20, 2023
Published by: Silesian University of Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Biomineralization,
MICP,
Soil improvement,
Soil parameters,
Ureolytic bacteria
Related subjects:
Architecture and design,
Architecture,
Architects, buildings

© 2023 Mariola Wasil, Urszula Wydro, Elżbieta Wołejko, published by Silesian University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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