Enhancing mechanical properties of micaceous weathered granitic soil: a synergetic approach using natural fibers and fly ash
文献类型：期刊论文
| 作者 | Wang, Gang5,6; Zhang, Xianwei5; Liu, Xinyu2,5; Gao, Haodong3; Song, Sheng1; Lu, Jianfeng4 |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2024-06-01 |
| 卷号 | 83期号:6页码:20 |
| 关键词 | Mica Weathered granitic soil Coir fiber Fly ash Strength Microstructure |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-024-03766-y |
| 英文摘要 | Micaceous weathered granitic soil (MWGS) is prevalent in the tropical regions of southern China, characterized by high compressibility, low compactability, and inadequate strength properties due to the presence of mica. Stabilization is crucial for transforming MWGS into a sustainable construction material for geotechnical engineering. This study focuses on enhancing the mechanical properties of MWGS by using coir fibers and fly ash, both locally available agricultural and industrial byproducts. Unconfined compression tests and consolidated drained triaxial compression tests were conducted on fiber-reinforced and fly-ash-treated MWGS under different stabilization conditions, considering the effects of fiber content, fly-ash content, and curing age. Scanning electron microscopy and energy-dispersive spectroscopy were also used to trace the microstructural evolution of the soil fabric in response to fiber reinforcement and fly-ash treatment. The experimental results indicate that higher fly ash content and longer curing give significantly improved soil strength and stiffness but poorer ductility. Incorporating coir fibers into the cemented soil matrix not only enhances the composite's strength, stiffness, and toughness but also shifts the shear response from brittle to ductile. For example, the compressive strength of MWGS could be improved by 49.1% with the inclusion of 1% content of coir fiber. Under the optimal dosage of fiber and fly ash, the soil compressive strength increased significantly from 114 kPa to 725 kPa. Microstructural analysis reveals that the bonding, friction, and interlocking among fibers, hydration products, and soil particles are the main contributors to the stable and strong microstructure and consequently the enhanced mechanical behavior of MWGS. This study provides an innovative and effective method for utilizing waste byproducts in stabilizing MWGS for practical geotechnical engineering applications. |
| 资助项目 | National Natural Science Foundation of China[41972285] ; National Natural Science Foundation of China[12102312] ; National Natural Science Foundation of China[42307212] ; Youth Innovation Promotion Association CAS[Y2022089] ; China Postdoctoral Science Foundation[2023 M741268] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001236588700001 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41558]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhang, Xianwei |
| 作者单位 | 1.Minist Nat Resources, Inst Oceanog 2, Hangzhou, Peoples R China 2.Huazhong Univ Sci & Technol, Sch Civil & Hydraul Engn, Wuhan, Peoples R China 3.Wuhan Univ Sci & Technol, Coll Urban Construct, Wuhan, Peoples R China 4.Wuhan Urban & Rural Dev Bur, Wuhan, Peoples R China 5.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China 6.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Gang,Zhang, Xianwei,Liu, Xinyu,et al. Enhancing mechanical properties of micaceous weathered granitic soil: a synergetic approach using natural fibers and fly ash[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2024,83(6):20. |
| APA | Wang, Gang,Zhang, Xianwei,Liu, Xinyu,Gao, Haodong,Song, Sheng,&Lu, Jianfeng.(2024).Enhancing mechanical properties of micaceous weathered granitic soil: a synergetic approach using natural fibers and fly ash.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,83(6),20. |
| MLA | Wang, Gang,et al."Enhancing mechanical properties of micaceous weathered granitic soil: a synergetic approach using natural fibers and fly ash".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 83.6(2024):20. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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