Academic Journal
The non-monotonic shape of the loading–collapse curve for partially saturated soils.
| Τίτλος: | The non-monotonic shape of the loading–collapse curve for partially saturated soils. |
|---|---|
| Συγγραφείς: | Ferrari, Alessio, Butticè, Vincenzo, Rosone, Marco |
| Πηγή: | Canadian Geotechnical Journal; 9/11/2026, Vol. 63, p1-13, 13p |
| Θεματικοί όροι: | Yield stress, Soil testing, Soil moisture, Soil matric potential, Material plasticity, Stress-strain curves |
| Abstract (English): | This study experimentally investigates the shape of the loading–collapse (LC) curve of unsaturated soils, focusing on the evolution of the yield stress with suction across the full range of degree of saturation. The experimental campaign included soils with distinct geotechnical characteristics—a quartz sand, Speswhite kaolin, and a scaly clay—subjected to controlled-suction loading. The results indicate that the yield stress does not increase monotonically with suction, as commonly assumed when the soils are in partially saturation conditions; instead, the yield curve reaches a maximum point, followed by a continuous decrease in yield stress as it approaches the residual saturation state. The experimental data were analyzed using both net stress and effective stress approaches, confirming that the observed shape of the LC curve is not influenced by the choice of the stress variables. Additionally, a specific controlled-suction oedometer test demonstrated that this new shape of the LC curve enables the activation of plastic strains due to drying processes conducted at vertical stress levels between the maximum yield stress and the yield stress at the driest state explored. [ABSTRACT FROM AUTHOR] |
| Abstract (French): | Cette étude examine expérimentalement la forme de la courbe de chargement–effondrement (LC) des sols non saturés, en mettant l'accent sur l'évolution de la contrainte de préconsolidation en fonction de la succion sur toute la plage du degré de saturation. La campagne expérimentale a porté sur des sols présentant des caractéristiques géotechniques distinctes — un sable quartzeux, un kaolin Speswhite et une argile écailleuse — soumis à des essais de chargement à succion contrôlée. Les résultats montrent que la contrainte de préconsolidation n'augmente pas de manière monotone avec la succion, contrairement à l'hypothèse couramment admise pour les sols partiellement saturés. La courbe LC atteint plutôt un maximum, suivi d'une diminution continue de la contrainte de préconsolidation à mesure que le sol s'approche de l'état de saturation résiduelle. Les données expérimentales ont été analysées à l'aide des approches fondées sur la contrainte nette et sur la contrainte effective, confirmant que la forme observée de la courbe LC n'est pas influencée par le choix des variables de contrainte. En outre, un essai œdométrique spécifique à succion contrôlée a démontré que cette nouvelle forme de la courbe LC permet l'apparition de déformations plastiques dues aux processus de séchage réalisés sous des niveaux de contrainte verticale compris entre la contrainte de préconsolidation maximale et la contrainte de préconsolidation correspondant à l'état le plus sec étudié. [ABSTRACT FROM AUTHOR] |
| Copyright of Canadian Geotechnical Journal is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Βάση Δεδομένων: | Complementary Index |
| FullText | Text: Availability: 0 |
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| Header | DbId: edb DbLabel: Complementary Index An: 196960216 RelevancyScore: 1162 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 1162.427734375 |
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| Items | – Name: Title Label: Title Group: Ti Data: The non-monotonic shape of the loading–collapse curve for partially saturated soils. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ferrari%2C+Alessio%22">Ferrari, Alessio</searchLink><br /><searchLink fieldCode="AR" term="%22Butticè%2C+Vincenzo%22">Butticè, Vincenzo</searchLink><br /><searchLink fieldCode="AR" term="%22Rosone%2C+Marco%22">Rosone, Marco</searchLink> – Name: TitleSource Label: Source Group: Src Data: Canadian Geotechnical Journal; 9/11/2026, Vol. 63, p1-13, 13p – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Yield+stress%22">Yield stress</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+testing%22">Soil testing</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+moisture%22">Soil moisture</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+matric+potential%22">Soil matric potential</searchLink><br /><searchLink fieldCode="DE" term="%22Material+plasticity%22">Material plasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Stress-strain+curves%22">Stress-strain curves</searchLink> – Name: AbstractNonEng Label: Abstract (English) Group: Ab Data: This study experimentally investigates the shape of the loading–collapse (LC) curve of unsaturated soils, focusing on the evolution of the yield stress with suction across the full range of degree of saturation. The experimental campaign included soils with distinct geotechnical characteristics—a quartz sand, Speswhite kaolin, and a scaly clay—subjected to controlled-suction loading. The results indicate that the yield stress does not increase monotonically with suction, as commonly assumed when the soils are in partially saturation conditions; instead, the yield curve reaches a maximum point, followed by a continuous decrease in yield stress as it approaches the residual saturation state. The experimental data were analyzed using both net stress and effective stress approaches, confirming that the observed shape of the LC curve is not influenced by the choice of the stress variables. Additionally, a specific controlled-suction oedometer test demonstrated that this new shape of the LC curve enables the activation of plastic strains due to drying processes conducted at vertical stress levels between the maximum yield stress and the yield stress at the driest state explored. [ABSTRACT FROM AUTHOR] – Name: AbstractNonEng Label: Abstract (French) Group: Ab Data: Cette étude examine expérimentalement la forme de la courbe de chargement–effondrement (LC) des sols non saturés, en mettant l'accent sur l'évolution de la contrainte de préconsolidation en fonction de la succion sur toute la plage du degré de saturation. La campagne expérimentale a porté sur des sols présentant des caractéristiques géotechniques distinctes — un sable quartzeux, un kaolin Speswhite et une argile écailleuse — soumis à des essais de chargement à succion contrôlée. Les résultats montrent que la contrainte de préconsolidation n'augmente pas de manière monotone avec la succion, contrairement à l'hypothèse couramment admise pour les sols partiellement saturés. La courbe LC atteint plutôt un maximum, suivi d'une diminution continue de la contrainte de préconsolidation à mesure que le sol s'approche de l'état de saturation résiduelle. Les données expérimentales ont été analysées à l'aide des approches fondées sur la contrainte nette et sur la contrainte effective, confirmant que la forme observée de la courbe LC n'est pas influencée par le choix des variables de contrainte. En outre, un essai œdométrique spécifique à succion contrôlée a démontré que cette nouvelle forme de la courbe LC permet l'apparition de déformations plastiques dues aux processus de séchage réalisés sous des niveaux de contrainte verticale compris entre la contrainte de préconsolidation maximale et la contrainte de préconsolidation correspondant à l'état le plus sec étudié. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Group: Ab Data: <i>Copyright of Canadian Geotechnical Journal is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1139/cgj-2025-1028 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1 Subjects: – SubjectFull: Yield stress Type: general – SubjectFull: Soil testing Type: general – SubjectFull: Soil moisture Type: general – SubjectFull: Soil matric potential Type: general – SubjectFull: Material plasticity Type: general – SubjectFull: Stress-strain curves Type: general Titles: – TitleFull: The non-monotonic shape of the loading–collapse curve for partially saturated soils. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ferrari, Alessio – PersonEntity: Name: NameFull: Butticè, Vincenzo – PersonEntity: Name: NameFull: Rosone, Marco IsPartOfRelationships: – BibEntity: Dates: – D: 11 M: 09 Text: 9/11/2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00083674 Numbering: – Type: volume Value: 63 Titles: – TitleFull: Canadian Geotechnical Journal Type: main |
| ResultId | 1 |