Logo do repositório
 
Publicação

Salinity Effects on the Physicochemical and Mechanical Behavior of Untreated and Lime-Treated Saline Soils

2024-12Artigo científico Acesso aberto
Ver registo simples
dc.contributor.authorBenrebouh, Imed
dc.contributor.authorHafhouf, Ilyas
dc.contributor.authorDouadi, Abdellah
dc.contributor.authorMerdas, Abdelghani
dc.contributor.authorMeguellati, Abderrahim
dc.contributor.authorFaria, Paulina
dc.contributor.institutionCERIS - Polo NOVA
dc.contributor.institutionDEC - Departamento de Engenharia Civil
dc.contributor.institutionFaculdade de Ciências e Tecnologia (FCT)
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2025-02-14T21:19:04Z
dc.date.available2025-02-14T21:19:04Z
dc.date.issued2024-12
dc.descriptionPublisher Copyright: © 2024 by the authors.
dc.description.abstractImproving saline soils’ properties by incorporating limes is a practical technique, generally due to cation exchange, pozzolanic reaction, and carbonation. This study explores how soil salinity, measured by electrical conductivity, affects untreated and lime-treated saline soils. An Algerian sebkha soil (from Ain M’lila) with an original high salinity (ECe3 = 23.2 dS.m−1) was used. The same soil was washed to create medium (ECe2 = 8.3 dS.m−1) and low (ECe1 = 2.32 dS.m−1) salinity soil samples. The results of this study indicate that salinity influenced the shape of the particle size distribution curve, particularly in the silt range. Salinity also had a significant effect on carbonate content (CaCO3) and unconfined compressive strength (UCS). For the untreated soil, when salinity decreased, the UCS and CaCO3 content increased. However, when salinity decreased for the treated soil, the UCS increased, while the CaCO3 content decreased. X-ray diffraction (XRD) analysis of untreated soils showed halite (NaCl) disappearance and gypsum (CaSO4 2H2O) reduction with decreasing salinity in ECe1. In treated soil at ECe3, these mineral phases remained constant. While XRD detected no new cementitious phases in treated ECe3 or ECe1 samples, thermogravimetric analysis confirmed the presence of portlandite in both. As Ain M’lila sebkha is a chloride–sulfate soil, the dissolution of the halite and gypsum phases released more Cl− and SO42− ions into the interstitial solution. In a low fraction of clay, these ions obstructed and slowed the pozzolanic reaction in the ECe3 soil. Identifying the season when this type of soil has lower salinity can be beneficial for treatment from a technical, economic, and environmental point of view.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent6231485
dc.identifier.doi10.3390/min14121217
dc.identifier.issn2075-163X
dc.identifier.otherPURE: 106340197
dc.identifier.otherPURE UUID: c2977cf7-2c81-4f43-ba5b-b86b3387133f
dc.identifier.otherScopus: 85213283927
dc.identifier.otherWOS: 001384965400001
dc.identifier.otherORCID: /0000-0003-0372-949X/work/178129205
dc.identifier.urihttp://hdl.handle.net/10362/179059
dc.identifier.urlhttps://www.scopus.com/pages/publications/85213283927
dc.language.isoeng
dc.peerreviewedyes
dc.subjectAin M’lila sebkha soil
dc.subjectbuilding lime
dc.subjectchloride–sulfate soil
dc.subjectsalt content
dc.subjectsoil treatment
dc.subjectunconfined compressive strength
dc.subjectGeotechnical Engineering and Engineering Geology
dc.subjectGeology
dc.titleSalinity Effects on the Physicochemical and Mechanical Behavior of Untreated and Lime-Treated Saline Soilsen
dc.typejournal article
degois.publication.issue12
degois.publication.titleMinerals
degois.publication.volume14
dspace.entity.typePublication
rcaap.rightsopenAccess

Ficheiros

Principais
A mostrar 1 - 1 de 1
Miniatura
Nome:
minerals-14-01217-v2.pdf
Tamanho:
5.94 MB
Formato:
Adobe Portable Document Format
Ver/Abrir

Coleções

Home collection (FCT)