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Laboratory Investigation into the Effect of Fines Plasticity on the Mechanical Behavior of Sand/Fines Mixtures
https://orcid.org/http://orcid.org/0000-0002-9456-8339
This paper presents a laboratory study carried out to investigate the mechanical behavior of Chlef sand emphasizing the effect of non-plastic fines content (silt) and plastic fines content (clay) on the sand-silt-clay mixture behavior. For this purpose, a series of direct shear tests were performed. The samples under study were taking account two initial relative densities for their preparation (RD = 55 and 85%). The test results showed that the shear strength of Chlef sand decreases with the increase of silt content from 0 to 40%, and for sand-clay and sand-silt-clay mixtures, the variation of shear strength has a threshold value; a decrease until 20% fines content followed by an increase considering the percentage of fines is higher. Cohesion increases with the increase of silt content, while for the sand-clay and sand-silt-clay mixtures, the cohesion increases until a threshold of 20% fines content with a same tendency as the variation of the direct shear strength. Contrariwise, a slight variation of the friction angle at the peak has been observed.
Laboratory Investigation into the Effect of Fines Plasticity on the Mechanical Behavior of Sand/Fines Mixtures
https://orcid.org/http://orcid.org/0000-0002-9456-8339
This paper presents a laboratory study carried out to investigate the mechanical behavior of Chlef sand emphasizing the effect of non-plastic fines content (silt) and plastic fines content (clay) on the sand-silt-clay mixture behavior. For this purpose, a series of direct shear tests were performed. The samples under study were taking account two initial relative densities for their preparation (RD = 55 and 85%). The test results showed that the shear strength of Chlef sand decreases with the increase of silt content from 0 to 40%, and for sand-clay and sand-silt-clay mixtures, the variation of shear strength has a threshold value; a decrease until 20% fines content followed by an increase considering the percentage of fines is higher. Cohesion increases with the increase of silt content, while for the sand-clay and sand-silt-clay mixtures, the cohesion increases until a threshold of 20% fines content with a same tendency as the variation of the direct shear strength. Contrariwise, a slight variation of the friction angle at the peak has been observed.
Laboratory Investigation into the Effect of Fines Plasticity on the Mechanical Behavior of Sand/Fines Mixtures
https://orcid.org/http://orcid.org/0000-0002-9456-8339
This paper presents a laboratory study carried out to investigate the mechanical behavior of Chlef sand emphasizing the effect of non-plastic fines content (silt) and plastic fines content (clay) on the sand-silt-clay mixture behavior. For this purpose, a series of direct shear tests were performed. The samples under study were taking account two initial relative densities for their preparation (RD = 55 and 85%). The test results showed that the shear strength of Chlef sand decreases with the increase of silt content from 0 to 40%, and for sand-clay and sand-silt-clay mixtures, the variation of shear strength has a threshold value; a decrease until 20% fines content followed by an increase considering the percentage of fines is higher. Cohesion increases with the increase of silt content, while for the sand-clay and sand-silt-clay mixtures, the cohesion increases until a threshold of 20% fines content with a same tendency as the variation of the direct shear strength. Contrariwise, a slight variation of the friction angle at the peak has been observed.
Laboratory Investigation into the Effect of Fines Plasticity on the Mechanical Behavior of Sand/Fines Mixtures
Transp. Infrastruct. Geotech.
Nougar, Benali (author) / Brahimi, Abdelkader (author) / Bouri, Djamel Eddine (author) / Arab, Ahmed (author) / Benessalah, Ismail (author)
Transportation Infrastructure Geotechnology ; 8 ; 438-451
2021-09-01
14 pages
Article (Journal)
Electronic Resource
English
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