Analysis of the Synergistic Effect on the Strength Characteristics of Modified Red Mud-Based Stabilized Soil
Based on the existing research results, this research team developed roadbed stabilized soil materials using nano-SiO<sub>2</sub> synergistically modified red mud in order to study whether the strength of the stabilized soil materials meets the strength requirements of the roadbed materi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/18/6104 |
| _version_ | 1797579130371309568 |
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| author | Shengjin Chen Jie Jiang Xiaoduo Ou Zhijie Tan |
| author_facet | Shengjin Chen Jie Jiang Xiaoduo Ou Zhijie Tan |
| author_sort | Shengjin Chen |
| collection | DOAJ |
| description | Based on the existing research results, this research team developed roadbed stabilized soil materials using nano-SiO<sub>2</sub> synergistically modified red mud in order to study whether the strength of the stabilized soil materials meets the strength requirements of the roadbed materials, and at the same time, analyze its strength characteristics to make the feasibility of it being used as a roadbed material clear. Through different combination schemes, the effects of different nano-SiO<sub>2</sub> and cement contents on the strength of the stabilized materials were explored. The test results show the following: In the synergistic modification of nano-SiO<sub>2</sub> and cement, nano-SiO<sub>2</sub> can significantly improve the early unconfined compressive strength of red mud-based stabilized soil. In the synergistic modification of nano-SiO<sub>2</sub>, gypsum, and cement, the 7 d unconfined compressive strength of red mud-based stabilized soil is greater than 2 MPa, which meets the strength requirements of road base materials and shows the superiority of synergism. The nominal stress–strain curves are divided into five stages: compressed and compacted stage, elastic deformation stage, plastic deformation stage, damage deformation stage, and residual deformation stage. The macroscopic compressive damage pattern of the specimens shows that the modified red mud-based stabilized soil mostly exhibits brittle damage. Tests have shown that the strength of modified terracotta-based stabilized soil meets the requirements of roadbed strength. |
| first_indexed | 2024-03-10T22:31:35Z |
| format | Article |
| id | doaj.art-fbb20c3870834d20bf13e5a593e8b2e4 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T22:31:35Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-fbb20c3870834d20bf13e5a593e8b2e42023-11-19T11:42:56ZengMDPI AGMaterials1996-19442023-09-011618610410.3390/ma16186104Analysis of the Synergistic Effect on the Strength Characteristics of Modified Red Mud-Based Stabilized SoilShengjin Chen0Jie Jiang1Xiaoduo Ou2Zhijie Tan3Guangxi Hualan Geotechnical Engineering Co., Ltd., Nanning 530001, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaGuangxi Hualan Geotechnical Engineering Co., Ltd., Nanning 530001, ChinaBased on the existing research results, this research team developed roadbed stabilized soil materials using nano-SiO<sub>2</sub> synergistically modified red mud in order to study whether the strength of the stabilized soil materials meets the strength requirements of the roadbed materials, and at the same time, analyze its strength characteristics to make the feasibility of it being used as a roadbed material clear. Through different combination schemes, the effects of different nano-SiO<sub>2</sub> and cement contents on the strength of the stabilized materials were explored. The test results show the following: In the synergistic modification of nano-SiO<sub>2</sub> and cement, nano-SiO<sub>2</sub> can significantly improve the early unconfined compressive strength of red mud-based stabilized soil. In the synergistic modification of nano-SiO<sub>2</sub>, gypsum, and cement, the 7 d unconfined compressive strength of red mud-based stabilized soil is greater than 2 MPa, which meets the strength requirements of road base materials and shows the superiority of synergism. The nominal stress–strain curves are divided into five stages: compressed and compacted stage, elastic deformation stage, plastic deformation stage, damage deformation stage, and residual deformation stage. The macroscopic compressive damage pattern of the specimens shows that the modified red mud-based stabilized soil mostly exhibits brittle damage. Tests have shown that the strength of modified terracotta-based stabilized soil meets the requirements of roadbed strength.https://www.mdpi.com/1996-1944/16/18/6104stabilized soilred mudsynergistic effectnano-SiO<sub>2</sub>strength characteristicsunconfined compressive strength |
| spellingShingle | Shengjin Chen Jie Jiang Xiaoduo Ou Zhijie Tan Analysis of the Synergistic Effect on the Strength Characteristics of Modified Red Mud-Based Stabilized Soil Materials stabilized soil red mud synergistic effect nano-SiO<sub>2</sub> strength characteristics unconfined compressive strength |
| title | Analysis of the Synergistic Effect on the Strength Characteristics of Modified Red Mud-Based Stabilized Soil |
| title_full | Analysis of the Synergistic Effect on the Strength Characteristics of Modified Red Mud-Based Stabilized Soil |
| title_fullStr | Analysis of the Synergistic Effect on the Strength Characteristics of Modified Red Mud-Based Stabilized Soil |
| title_full_unstemmed | Analysis of the Synergistic Effect on the Strength Characteristics of Modified Red Mud-Based Stabilized Soil |
| title_short | Analysis of the Synergistic Effect on the Strength Characteristics of Modified Red Mud-Based Stabilized Soil |
| title_sort | analysis of the synergistic effect on the strength characteristics of modified red mud based stabilized soil |
| topic | stabilized soil red mud synergistic effect nano-SiO<sub>2</sub> strength characteristics unconfined compressive strength |
| url | https://www.mdpi.com/1996-1944/16/18/6104 |
| work_keys_str_mv | AT shengjinchen analysisofthesynergisticeffectonthestrengthcharacteristicsofmodifiedredmudbasedstabilizedsoil AT jiejiang analysisofthesynergisticeffectonthestrengthcharacteristicsofmodifiedredmudbasedstabilizedsoil AT xiaoduoou analysisofthesynergisticeffectonthestrengthcharacteristicsofmodifiedredmudbasedstabilizedsoil AT zhijietan analysisofthesynergisticeffectonthestrengthcharacteristicsofmodifiedredmudbasedstabilizedsoil |