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

Microbial-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 e...

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Autores principales:	Miguel Valencia-Galindo, Esteban Sáez, Carlos Ovalle, Francisco Ruz
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	microbial-induced carbonate precipitation soil improvement expansive clays Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/a8c29ff9e5a54b43afc36427c70064fb
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spelling	oai:doaj.org-article:a8c29ff9e5a54b43afc36427c70064fb2021-11-25T17:00:11ZEvaluation of the Effectiveness of a Soil Treatment Using Calcium Carbonate Precipitation from Cultivated and Lyophilized Bacteria in Soil’s Compaction Water10.3390/buildings111105452075-5309https://doaj.org/article/a8c29ff9e5a54b43afc36427c70064fb2021-11-01T00:00:00Zhttps://www.mdpi.com/2075-5309/11/11/545https://doaj.org/toc/2075-5309Microbial-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.Miguel Valencia-GalindoEsteban SáezCarlos OvalleFrancisco RuzMDPI AGarticlemicrobial-induced carbonate precipitationsoil improvementexpansive claysBuilding constructionTH1-9745ENBuildings, Vol 11, Iss 545, p 545 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	microbial-induced carbonate precipitation soil improvement expansive clays Building construction TH1-9745
spellingShingle	microbial-induced carbonate precipitation soil improvement expansive clays Building construction TH1-9745 Miguel Valencia-Galindo Esteban Sáez Carlos Ovalle Francisco Ruz Evaluation of the Effectiveness of a Soil Treatment Using Calcium Carbonate Precipitation from Cultivated and Lyophilized Bacteria in Soil’s Compaction Water
description	Microbial-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.
format	article
author	Miguel Valencia-Galindo Esteban Sáez Carlos Ovalle Francisco Ruz
author_facet	Miguel Valencia-Galindo Esteban Sáez Carlos Ovalle Francisco Ruz
author_sort	Miguel Valencia-Galindo
title	Evaluation of the Effectiveness of a Soil Treatment Using Calcium Carbonate Precipitation from Cultivated and Lyophilized Bacteria in Soil’s Compaction Water
title_short	Evaluation of the Effectiveness of a Soil Treatment Using Calcium Carbonate Precipitation from Cultivated and Lyophilized Bacteria in Soil’s Compaction Water
title_full	Evaluation of the Effectiveness of a Soil Treatment Using Calcium Carbonate Precipitation from Cultivated and Lyophilized Bacteria in Soil’s Compaction Water
title_fullStr	Evaluation of the Effectiveness of a Soil Treatment Using Calcium Carbonate Precipitation from Cultivated and Lyophilized Bacteria in Soil’s Compaction Water
title_full_unstemmed	Evaluation of the Effectiveness of a Soil Treatment Using Calcium Carbonate Precipitation from Cultivated and Lyophilized Bacteria in Soil’s Compaction Water
title_sort	evaluation of the effectiveness of a soil treatment using calcium carbonate precipitation from cultivated and lyophilized bacteria in soil’s compaction water
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a8c29ff9e5a54b43afc36427c70064fb
work_keys_str_mv	AT miguelvalenciagalindo evaluationoftheeffectivenessofasoiltreatmentusingcalciumcarbonateprecipitationfromcultivatedandlyophilizedbacteriainsoilscompactionwater AT estebansaez evaluationoftheeffectivenessofasoiltreatmentusingcalciumcarbonateprecipitationfromcultivatedandlyophilizedbacteriainsoilscompactionwater AT carlosovalle evaluationoftheeffectivenessofasoiltreatmentusingcalciumcarbonateprecipitationfromcultivatedandlyophilizedbacteriainsoilscompactionwater AT franciscoruz evaluationoftheeffectivenessofasoiltreatmentusingcalciumcarbonateprecipitationfromcultivatedandlyophilizedbacteriainsoilscompactionwater
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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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