Effect of the soil type on the biocementation process by enzymatic way

Detalhes bibliográficos
Autor(a) principal: Oliveira, Paulo J. Venda
Data de Publicação: 2020
Outros Autores: Freitas, Luís D.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/105895
https://doi.org/10.1051/e3sconf/202019505008
Resumo: The effect of the enzymatic CaCO3 precipitation on the behaviour of four soils (from a poorly graded sand to a fine and organic soil) is studied in this work. The analysis is based on the results of UCS tests, where the results from the non-stabilised specimens are compared with specimens stabilised with a urease concentration of 8 kU/L and an equimolar solution of urea-CaCl2 of 0.5 mol/L. Additionally, pH and scanning electron microscopy (SEM) tests with energy dispersive X-ray (EDX) analyses are performed to analyse the microstructure and the local chemical composition. The results of the UCS tests show that, in the case of the sandy and silty soils, the process of enzymatic CaCO3 precipitation potentiates the strengthening of the soils while, in the organic soil, a detrimental effect is observed. The SEM tests show the existence of vestiges of calcium in the biostabilised soils studied.
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spelling Effect of the soil type on the biocementation process by enzymatic wayThe effect of the enzymatic CaCO3 precipitation on the behaviour of four soils (from a poorly graded sand to a fine and organic soil) is studied in this work. The analysis is based on the results of UCS tests, where the results from the non-stabilised specimens are compared with specimens stabilised with a urease concentration of 8 kU/L and an equimolar solution of urea-CaCl2 of 0.5 mol/L. Additionally, pH and scanning electron microscopy (SEM) tests with energy dispersive X-ray (EDX) analyses are performed to analyse the microstructure and the local chemical composition. The results of the UCS tests show that, in the case of the sandy and silty soils, the process of enzymatic CaCO3 precipitation potentiates the strengthening of the soils while, in the organic soil, a detrimental effect is observed. The SEM tests show the existence of vestiges of calcium in the biostabilised soils studied.2020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/105895http://hdl.handle.net/10316/105895https://doi.org/10.1051/e3sconf/202019505008eng2267-1242Oliveira, Paulo J. VendaFreitas, Luís D.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-14T21:31:42ZPortal AgregadorONG
dc.title.none.fl_str_mv Effect of the soil type on the biocementation process by enzymatic way
title Effect of the soil type on the biocementation process by enzymatic way
spellingShingle Effect of the soil type on the biocementation process by enzymatic way
Oliveira, Paulo J. Venda
title_short Effect of the soil type on the biocementation process by enzymatic way
title_full Effect of the soil type on the biocementation process by enzymatic way
title_fullStr Effect of the soil type on the biocementation process by enzymatic way
title_full_unstemmed Effect of the soil type on the biocementation process by enzymatic way
title_sort Effect of the soil type on the biocementation process by enzymatic way
author Oliveira, Paulo J. Venda
author_facet Oliveira, Paulo J. Venda
Freitas, Luís D.
author_role author
author2 Freitas, Luís D.
author2_role author
dc.contributor.author.fl_str_mv Oliveira, Paulo J. Venda
Freitas, Luís D.
description The effect of the enzymatic CaCO3 precipitation on the behaviour of four soils (from a poorly graded sand to a fine and organic soil) is studied in this work. The analysis is based on the results of UCS tests, where the results from the non-stabilised specimens are compared with specimens stabilised with a urease concentration of 8 kU/L and an equimolar solution of urea-CaCl2 of 0.5 mol/L. Additionally, pH and scanning electron microscopy (SEM) tests with energy dispersive X-ray (EDX) analyses are performed to analyse the microstructure and the local chemical composition. The results of the UCS tests show that, in the case of the sandy and silty soils, the process of enzymatic CaCO3 precipitation potentiates the strengthening of the soils while, in the organic soil, a detrimental effect is observed. The SEM tests show the existence of vestiges of calcium in the biostabilised soils studied.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/105895
http://hdl.handle.net/10316/105895
https://doi.org/10.1051/e3sconf/202019505008
url http://hdl.handle.net/10316/105895
https://doi.org/10.1051/e3sconf/202019505008
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2267-1242
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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