Experimental study on the synergistic effect of coir fiber and lime to improve soil performance
To solve the problems of poor engineering properties of clay and low utilisation of coir fiber, a green and high-performance soil was obtained by using coir fiber in synergy with lime for clay reinforcement. Compaction test and unconfined compression test were carried out to analyze the influence of...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Hydrogeology & Engineering Geology
2025-01-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202311016 |
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| _version_ | 1832595887559278592 |
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| author | Lihua LI Wen LIU Yuxia BAI Cuiying WANG Shuangqin LI |
| author_facet | Lihua LI Wen LIU Yuxia BAI Cuiying WANG Shuangqin LI |
| author_sort | Lihua LI |
| collection | DOAJ |
| description | To solve the problems of poor engineering properties of clay and low utilisation of coir fiber, a green and high-performance soil was obtained by using coir fiber in synergy with lime for clay reinforcement. Compaction test and unconfined compression test were carried out to analyze the influence of fiber content and lime content on the early compressive strength, axial compression deformation characteristics, and deformation modulus parameters of clay. The microscopic mechanism of the synergistic effect of fiber-lime soil was analyzed by scanning electron microscope and X-ray diffraction, and then the synergistic mechanism was discussed. The results show that the addition of lime reduces the maximum dry density and increases the optimum moisture content of the clay. With an increase in lime content, the compressive strength of the soil initially exhibits a rise followed by a decline. The strain of the soil failure shows a decrease first and then an increase, indicating a brittle failure mode. Similarly, as the fiber content increases, the compressive strength of the soil also experiences an initial increase followed by a subsequent decrease. However, in this case, there is a gradual increase in failure strain suggesting a plastic failure mode. The relationship between deformation modulus and compressive strength of improved soil is linear. Lime fills up pores by reacting with the soil to form gelled substances, while fibers form a three-dimensional network structure providing growth areas for hydration products, thereby synergistically reinforcing the soil. This study can provide theoretical and technical guidance for roadbed improvement and slope repair. |
| format | Article |
| id | doaj-art-0ba99932189940949a8183353553d990 |
| institution | Kabale University |
| issn | 1000-3665 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj-art-0ba99932189940949a8183353553d9902025-01-18T03:52:24ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652025-01-0152113014010.16030/j.cnki.issn.1000-3665.202311016202311016Experimental study on the synergistic effect of coir fiber and lime to improve soil performanceLihua LI0Wen LIU1Yuxia BAI2Cuiying WANG3Shuangqin LI4School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, Hubei 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, Hubei 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, Hubei 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, Hubei 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, Hubei 430068, ChinaTo solve the problems of poor engineering properties of clay and low utilisation of coir fiber, a green and high-performance soil was obtained by using coir fiber in synergy with lime for clay reinforcement. Compaction test and unconfined compression test were carried out to analyze the influence of fiber content and lime content on the early compressive strength, axial compression deformation characteristics, and deformation modulus parameters of clay. The microscopic mechanism of the synergistic effect of fiber-lime soil was analyzed by scanning electron microscope and X-ray diffraction, and then the synergistic mechanism was discussed. The results show that the addition of lime reduces the maximum dry density and increases the optimum moisture content of the clay. With an increase in lime content, the compressive strength of the soil initially exhibits a rise followed by a decline. The strain of the soil failure shows a decrease first and then an increase, indicating a brittle failure mode. Similarly, as the fiber content increases, the compressive strength of the soil also experiences an initial increase followed by a subsequent decrease. However, in this case, there is a gradual increase in failure strain suggesting a plastic failure mode. The relationship between deformation modulus and compressive strength of improved soil is linear. Lime fills up pores by reacting with the soil to form gelled substances, while fibers form a three-dimensional network structure providing growth areas for hydration products, thereby synergistically reinforcing the soil. This study can provide theoretical and technical guidance for roadbed improvement and slope repair.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202311016coir fiberlimeclaystrengthdeformation characteristicsaction mechanismmicrostructure |
| spellingShingle | Lihua LI Wen LIU Yuxia BAI Cuiying WANG Shuangqin LI Experimental study on the synergistic effect of coir fiber and lime to improve soil performance Shuiwen dizhi gongcheng dizhi coir fiber lime clay strength deformation characteristics action mechanism microstructure |
| title | Experimental study on the synergistic effect of coir fiber and lime to improve soil performance |
| title_full | Experimental study on the synergistic effect of coir fiber and lime to improve soil performance |
| title_fullStr | Experimental study on the synergistic effect of coir fiber and lime to improve soil performance |
| title_full_unstemmed | Experimental study on the synergistic effect of coir fiber and lime to improve soil performance |
| title_short | Experimental study on the synergistic effect of coir fiber and lime to improve soil performance |
| title_sort | experimental study on the synergistic effect of coir fiber and lime to improve soil performance |
| topic | coir fiber lime clay strength deformation characteristics action mechanism microstructure |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202311016 |
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