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Pore-size changes and responses of kaolinite with different structures subject to consolidation and shearing
https://orcid.org/0000-0001-7829-2750
Abstract In this paper, the responses of kaolinite samples with two different soil structures, i.e., unwashed and pH7.8 samples, under 1-D consolidation, isotropic loading–unloading and triaxial shearing are examined. The focus is on the associated changes in the pore-size distribution. During isotropic consolidation, the unwashed sample, with an open, aggregated and flocculated structure, exhibits higher compressibility than the pH7.8 sample, which has a densely packed aggregated structure. The associated deformation in both samples primarily arises from the compression of the large inter-aggregate pores, which are not controlled by the suppression of the electrical double layer, and the intra-aggregate pores remain almost unchanged during consolidation. Similar behavior is observed in clay samples with different structures during 1-D consolidation and triaxial shearing that only the inter-aggregate pores are affected and the intra-aggregate pores stay almost the same. All of these findings suggest that the mechanical responses of kaolinite clay depend on aggregate-to-aggregate interactions rather than on particle-to-particle interactions. The aggregates of kaolinite clay can be considered analogous to sand particles.
Highlights Consolidation and shearing involves the inter-aggregate pores of kaolinites. Mechanical responses of kaolinite depend on aggregate-to-aggregate interactions. The aggregates of kaolinite can be considered analogous to sand particles.
Pore-size changes and responses of kaolinite with different structures subject to consolidation and shearing
https://orcid.org/0000-0001-7829-2750
Abstract In this paper, the responses of kaolinite samples with two different soil structures, i.e., unwashed and pH7.8 samples, under 1-D consolidation, isotropic loading–unloading and triaxial shearing are examined. The focus is on the associated changes in the pore-size distribution. During isotropic consolidation, the unwashed sample, with an open, aggregated and flocculated structure, exhibits higher compressibility than the pH7.8 sample, which has a densely packed aggregated structure. The associated deformation in both samples primarily arises from the compression of the large inter-aggregate pores, which are not controlled by the suppression of the electrical double layer, and the intra-aggregate pores remain almost unchanged during consolidation. Similar behavior is observed in clay samples with different structures during 1-D consolidation and triaxial shearing that only the inter-aggregate pores are affected and the intra-aggregate pores stay almost the same. All of these findings suggest that the mechanical responses of kaolinite clay depend on aggregate-to-aggregate interactions rather than on particle-to-particle interactions. The aggregates of kaolinite clay can be considered analogous to sand particles.
Highlights Consolidation and shearing involves the inter-aggregate pores of kaolinites. Mechanical responses of kaolinite depend on aggregate-to-aggregate interactions. The aggregates of kaolinite can be considered analogous to sand particles.
Pore-size changes and responses of kaolinite with different structures subject to consolidation and shearing
https://orcid.org/0000-0001-7829-2750
Abstract In this paper, the responses of kaolinite samples with two different soil structures, i.e., unwashed and pH7.8 samples, under 1-D consolidation, isotropic loading–unloading and triaxial shearing are examined. The focus is on the associated changes in the pore-size distribution. During isotropic consolidation, the unwashed sample, with an open, aggregated and flocculated structure, exhibits higher compressibility than the pH7.8 sample, which has a densely packed aggregated structure. The associated deformation in both samples primarily arises from the compression of the large inter-aggregate pores, which are not controlled by the suppression of the electrical double layer, and the intra-aggregate pores remain almost unchanged during consolidation. Similar behavior is observed in clay samples with different structures during 1-D consolidation and triaxial shearing that only the inter-aggregate pores are affected and the intra-aggregate pores stay almost the same. All of these findings suggest that the mechanical responses of kaolinite clay depend on aggregate-to-aggregate interactions rather than on particle-to-particle interactions. The aggregates of kaolinite clay can be considered analogous to sand particles.
Highlights Consolidation and shearing involves the inter-aggregate pores of kaolinites. Mechanical responses of kaolinite depend on aggregate-to-aggregate interactions. The aggregates of kaolinite can be considered analogous to sand particles.
Pore-size changes and responses of kaolinite with different structures subject to consolidation and shearing
Yu, Chun Ying (author) / Chow, Jun Kang (author) / Wang, Yu-Hsing (author)
Engineering Geology ; 202 ; 122-131
2016-01-10
10 pages
Article (Journal)
Electronic Resource
English
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