Application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sand
This study was carried out to describe the mechanical behavior of different materials in terms of shear strength, cohesion and friction. For this purpose, an experimental shear tests were carried out. The soils used for the preparation of the samples were the Chlef sand, Chlef silt and M’zilla clay...
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| Format: | Article |
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Universidade Federal de Viçosa (UFV)
2024-05-01
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| Series: | The Journal of Engineering and Exact Sciences |
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| Online Access: | https://periodicos.ufv.br/jcec/article/view/18878 |
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| author | Benali Nougar Abdelkader Brahimi Djamel Edddine Bouri Abdallah Krim Omar Safer Kamel Menad Ahmed Arab |
| author_facet | Benali Nougar Abdelkader Brahimi Djamel Edddine Bouri Abdallah Krim Omar Safer Kamel Menad Ahmed Arab |
| author_sort | Benali Nougar |
| collection | DOAJ |
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This study was carried out to describe the mechanical behavior of different materials in terms of shear strength, cohesion and friction. For this purpose, an experimental shear tests were carried out. The soils used for the preparation of the samples were the Chlef sand, Chlef silt and M’zilla clay and a mixture composed of 50% of silt and 50% of clay. The soils were prepared by mixing Chlef sand with fines content of silt, clay or clay silt ranging from 0, 10, 20, 30 and 40%. The tests were conducted on sand samples prepared at a relative density of 20% representing a loose state and subjected to three normal stresses of 100, 200 and 400 kPa. All the tests were conducted at constant displacement rate of 1.00 mm/min. From the obtained results, it can be seen that the clean sand showed the highest shear strength at a small strains. At large strains, sands with 30% clay rather than 30% clay silt showed the highest shear strengths respectively. More contracted sands have the greatest increased maximum shear strengths. The sand with clayey silt, at a fine content of 20%, develops the most increased cohesion, among the other silty-clayey sands, together with the most reduced shear strength in elastic behavior. The sand with 40% of silt content develops a greater internal friction angle, however, the other silty sands, showed reduced shear strength, at the same behavior. To validate these findings, numerical simulations were performed on sand-silt mixtures using the hypoplastic model. The results indicated that the hypoplastic model accurately predicts the shear behavior of sand-silt mixtures in direct shear test, providing realistic insights into the effects of fines on the mechanical properties of the soil.
Keywords: Sand, Silt, Clay, Fines Content, Shear Strength, Friction, Cohesion.
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| format | Article |
| id | doaj-art-714b074668ef4c8ea0d47663ac862948 |
| institution | Kabale University |
| issn | 2527-1075 |
| language | English |
| publishDate | 2024-05-01 |
| publisher | Universidade Federal de Viçosa (UFV) |
| record_format | Article |
| series | The Journal of Engineering and Exact Sciences |
| spelling | doaj-art-714b074668ef4c8ea0d47663ac8629482025-02-02T19:53:40ZengUniversidade Federal de Viçosa (UFV)The Journal of Engineering and Exact Sciences2527-10752024-05-0110410.18540/jcecvl10iss4pp18878Application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sandBenali Nougar0Abdelkader Brahimi1Djamel Edddine Bouri 2Abdallah Krim3Omar Safer 4Kamel Menad 5Ahmed Arab6Innovative Materials Laboratory and Renewable Energies, Department of civil Engineering, Faculty of Science and Technology, University of Relizane, Bourmadia 48000 Relizane, AlgeriaUniversity Center of Mila. Institute of Science and Technology. Civil Engineering and Hydraulics Department, Mila (Algeria).Ecole Nationale Supérieure d'Hydraulique, Blida, Algeria.University ibn khaldoun of Tiaret, Algeria.Innovative Materials Laboratory and Renewable Energies, Department of civil Engineering, Faculty of Science and Technology, University of Relizane, Bourmadia 48000 Relizane, Algeria.Innovative Materials Laboratory and Renewable Energies, Department of civil Engineering, Faculty of Science and Technology, University of Relizane, Bourmadia 48000 Relizane, Algeria.Hassiba Benbouali University of Chlef, Algeria. Laboratory of Materials Sciences and Environment (LMSE), Hassiba Ben Bouali University of Chlef (2000), Algeria. This study was carried out to describe the mechanical behavior of different materials in terms of shear strength, cohesion and friction. For this purpose, an experimental shear tests were carried out. The soils used for the preparation of the samples were the Chlef sand, Chlef silt and M’zilla clay and a mixture composed of 50% of silt and 50% of clay. The soils were prepared by mixing Chlef sand with fines content of silt, clay or clay silt ranging from 0, 10, 20, 30 and 40%. The tests were conducted on sand samples prepared at a relative density of 20% representing a loose state and subjected to three normal stresses of 100, 200 and 400 kPa. All the tests were conducted at constant displacement rate of 1.00 mm/min. From the obtained results, it can be seen that the clean sand showed the highest shear strength at a small strains. At large strains, sands with 30% clay rather than 30% clay silt showed the highest shear strengths respectively. More contracted sands have the greatest increased maximum shear strengths. The sand with clayey silt, at a fine content of 20%, develops the most increased cohesion, among the other silty-clayey sands, together with the most reduced shear strength in elastic behavior. The sand with 40% of silt content develops a greater internal friction angle, however, the other silty sands, showed reduced shear strength, at the same behavior. To validate these findings, numerical simulations were performed on sand-silt mixtures using the hypoplastic model. The results indicated that the hypoplastic model accurately predicts the shear behavior of sand-silt mixtures in direct shear test, providing realistic insights into the effects of fines on the mechanical properties of the soil. Keywords: Sand, Silt, Clay, Fines Content, Shear Strength, Friction, Cohesion. https://periodicos.ufv.br/jcec/article/view/18878SandSiltClayFines ContentShear StrengthFriction |
| spellingShingle | Benali Nougar Abdelkader Brahimi Djamel Edddine Bouri Abdallah Krim Omar Safer Kamel Menad Ahmed Arab Application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sand The Journal of Engineering and Exact Sciences Sand Silt Clay Fines Content Shear Strength Friction |
| title | Application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sand |
| title_full | Application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sand |
| title_fullStr | Application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sand |
| title_full_unstemmed | Application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sand |
| title_short | Application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sand |
| title_sort | application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sand |
| topic | Sand Silt Clay Fines Content Shear Strength Friction |
| url | https://periodicos.ufv.br/jcec/article/view/18878 |
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