Evaluation of the Effectiveness of a Soil Treatment Using Calcium Carbonate Precipitation from Cultivated and Lyophilized Bacteria in Soil's Compaction Water

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dc.contributor.authorValencia-Galindo, Miguel
dc.contributor.authorSaez, Esteban
dc.contributor.authorOvalle, Carlos
dc.contributor.authorRuz, Francisco
dc.date.accessioned2025-01-20T22:04:27Z
dc.date.available2025-01-20T22:04:27Z
dc.date.issued2021
dc.description.abstractMicrobial-induced carbonate precipitation (MICP) is a bio-inspired solution where bacteria metabolize urea to precipitate. This carbonate acts as a bio-cement that bonds soil particles. The existing framework has focused mainly on applying MICP through infiltration of liquid bacterial solutions in existing soil deposits. However, this technique is inefficient in soils with high fines content and low hydraulic conductivity, and thus few studies have focused on the use of MICP in fine soils. The main objective of this study was to evaluate the effect of MICP applied to compaction water in soils containing expansive clays and sandy silts. This approach searches for a better distribution of bacteria, nutrients, and calcium sources and is easy to apply if associated with a compaction process. In soils with expansive minerals, the effect of MICP in swelling potential was explored at laboratory and field scales. In sandy silts, the evolution of the stiffness and strength were studied at the laboratory scale. The treatment at the laboratory scale reduced the swelling potential; nevertheless, no significant effect of MICP was found in the field test. In sandy silts, the strength and stiffness increased under unsaturated conditions; however, subsequent saturation dissolved the cementation and the improvement vanished.
dc.fuente.origenWOS
dc.identifier.doi10.3390/buildings11110545
dc.identifier.eissn2075-5309
dc.identifier.urihttps://doi.org/10.3390/buildings11110545
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94089
dc.identifier.wosidWOS:000726907600001
dc.issue.numero11
dc.language.isoen
dc.revistaBuildings
dc.rightsacceso restringido
dc.subjectmicrobial-induced carbonate precipitation
dc.subjectsoil improvement
dc.subjectexpansive clays
dc.titleEvaluation of the Effectiveness of a Soil Treatment Using Calcium Carbonate Precipitation from Cultivated and Lyophilized Bacteria in Soil's Compaction Water
dc.typeartículo
dc.volumen11
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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