Biocementation as a Pro-Ecological Method of Stabilizing Construction Subsoil

Katarzyna Stefaniak, Jędrzej Wierzbicki, Barbara Ksit and Anna Szymczak-Graczyk
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Katarzyna Stefaniak: Institute of Geology, Adam Mickiewicz University, 61-680 Poznań, Poland
Jędrzej Wierzbicki: Institute of Geology, Adam Mickiewicz University, 61-680 Poznań, Poland
Barbara Ksit: Institute of Building Engineering, Faculty of Civil and Transport Engineering, Poznan University of Technology, Piotrowo 5, 60-965 Poznań, Poland
Anna Szymczak-Graczyk: Department of Construction and Geoengineering, Faculty of Environmental and Mechanical Engineering, Poznan University of Life Sciences, Piątkowska 94E, 60-649 Poznań, Poland

Energies, 2023, vol. 16, issue 6, 1-15

Abstract: The principle of sustainable development imposes an obligation on societies to manage natural resources rationally and to care for the quality of the environment, by, among other things, reducing CO 2 emissions. Alternative ways of stabilising building substrates by increasing their shear strength (c u ) are increasingly being sought. This paper presents how microorganisms can influence c u and thus the load-bearing capacity of building substrates. Tests were performed in a triaxial compression apparatus in three variants. The first variant of testing was carried out on cemented soil samples, which were cemented in situ. The next two series of tests were performed on reconstructed samples, i.e., natural soil and soil inoculated with a solution of Sporosarcina pasteurii bacteria . The results obtained show that carbonate cementation increases the shear strength of the soil; in addition, this biomineralization-induced cementation gives higher c u results than natural carbonate cementation.

Keywords: shear strength; stabilization; bio-cementation; Sporosarcina pasteurii; MICP (microbially induced calcite precipitation) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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