Effect of Nanosilica on the Undrained Shear Strength of Organic Soil
Organic soil is widely recognized for its low shear strength and high compressibility, which pose challenges for construction projects. One of the most commonly used methods for enhancing the mechanical properties of soil is chemical stabilization using various additives. In this study, the undraine...
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MDPI AG
2025-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/15/9/702 |
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| author | Carlos Solórzano-Blacio Jorge Albuja-Sánchez |
| author_facet | Carlos Solórzano-Blacio Jorge Albuja-Sánchez |
| author_sort | Carlos Solórzano-Blacio |
| collection | DOAJ |
| description | Organic soil is widely recognized for its low shear strength and high compressibility, which pose challenges for construction projects. One of the most commonly used methods for enhancing the mechanical properties of soil is chemical stabilization using various additives. In this study, the undrained shear strength of organic soil from Quito, Ecuador, with an average organic content of 43.84%, was reinforced using 0.5, 1, 3, and 6% nanosilica. A series of tests, including Atterberg limit, specific gravity, compaction, and unconfined compression tests, were conducted on specimens cured for 28 days. The results indicate that increasing the nanosilica content leads to higher plasticity, lower maximum dry density, and higher optimum moisture content. In addition, the modulus of elasticity and undrained shear strength improved. The optimal nanosilica content was found to be 1%, resulting in a 211.28% increase in the undrained shear strength. The mechanisms of soil improvement driven by the chemical interactions between nanosilica, mineralogical components (analyzed via XRD), and soil organic matter are discussed in detail. |
| format | Article |
| id | doaj-art-6eec8e3403c04313a3bedb3831bb7378 |
| institution | OA Journals |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-6eec8e3403c04313a3bedb3831bb73782025-08-20T02:24:55ZengMDPI AGNanomaterials2079-49912025-05-0115970210.3390/nano15090702Effect of Nanosilica on the Undrained Shear Strength of Organic SoilCarlos Solórzano-Blacio0Jorge Albuja-Sánchez1Multidisciplinary Engineering Research Hub (MER Hub), Faculty of Habitat, Infrastructure, and Creativity, Pontificia Universidad Católica del Ecuador (PUCE), Quito 170143, EcuadorMultidisciplinary Engineering Research Hub (MER Hub), Faculty of Habitat, Infrastructure, and Creativity, Pontificia Universidad Católica del Ecuador (PUCE), Quito 170143, EcuadorOrganic soil is widely recognized for its low shear strength and high compressibility, which pose challenges for construction projects. One of the most commonly used methods for enhancing the mechanical properties of soil is chemical stabilization using various additives. In this study, the undrained shear strength of organic soil from Quito, Ecuador, with an average organic content of 43.84%, was reinforced using 0.5, 1, 3, and 6% nanosilica. A series of tests, including Atterberg limit, specific gravity, compaction, and unconfined compression tests, were conducted on specimens cured for 28 days. The results indicate that increasing the nanosilica content leads to higher plasticity, lower maximum dry density, and higher optimum moisture content. In addition, the modulus of elasticity and undrained shear strength improved. The optimal nanosilica content was found to be 1%, resulting in a 211.28% increase in the undrained shear strength. The mechanisms of soil improvement driven by the chemical interactions between nanosilica, mineralogical components (analyzed via XRD), and soil organic matter are discussed in detail.https://www.mdpi.com/2079-4991/15/9/702soil stabilizationorganic soilnanosilicaundrained shear strengthelastic modulus |
| spellingShingle | Carlos Solórzano-Blacio Jorge Albuja-Sánchez Effect of Nanosilica on the Undrained Shear Strength of Organic Soil Nanomaterials soil stabilization organic soil nanosilica undrained shear strength elastic modulus |
| title | Effect of Nanosilica on the Undrained Shear Strength of Organic Soil |
| title_full | Effect of Nanosilica on the Undrained Shear Strength of Organic Soil |
| title_fullStr | Effect of Nanosilica on the Undrained Shear Strength of Organic Soil |
| title_full_unstemmed | Effect of Nanosilica on the Undrained Shear Strength of Organic Soil |
| title_short | Effect of Nanosilica on the Undrained Shear Strength of Organic Soil |
| title_sort | effect of nanosilica on the undrained shear strength of organic soil |
| topic | soil stabilization organic soil nanosilica undrained shear strength elastic modulus |
| url | https://www.mdpi.com/2079-4991/15/9/702 |
| work_keys_str_mv | AT carlossolorzanoblacio effectofnanosilicaontheundrainedshearstrengthoforganicsoil AT jorgealbujasanchez effectofnanosilicaontheundrainedshearstrengthoforganicsoil |