Impact of mica on geotechnical behavior of weathered granitic soil using macro and micro investigations
文献类型：期刊论文
| 作者 | Zhang, Xianwei2; Liu, Xinyu1; Gao, Haodong3; Wang, Gang2,4; An, Ran3; Liang, Zhu5,6 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
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| 出版日期 | 2024-06-01 |
| 卷号 | 16期号:6页码:2250-2266 |
| 关键词 | Weathered granitic soil (WGS) Mica Microstructure Physical properties Mechanical properties Mechanism |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.03.011 |
| 英文摘要 | The micaceous weathered granitic soil (WGS) is frequently encountered in civil engineering worldwide, unfortunately little information is available regarding how mica affects the physico-mechanical behaviors of WGS. This study prepares reconstituted WGS with different mica contents by removing natural mica in the WGS, and then mixes it with commercial mica powders. The geotechnical behavior as well as the microstructures of the mixtures are characterized. The addition of mica enables the physical indices of WGS to be specific combinations of coarser gradation and high permeability but high Atterberg limits. However, high mica content in WGS was found to be associated with undesirable mechanical properties, including increased compressibility, disintegration, and swelling potential, as well as poor compactability and low effective frictional angle. Microstructural analysis indicates that the influence of mica on the responses of mixtures originates from the intrinsic nature of mica as well as the particle packing being formed within WGS. Mica exists in the mixture as stacks of plates that form a spongy structure with high compressibility and swelling potential. Pores among the plates give the soil high water retention and high Atterberg limits. Large pores are also generated by soil particles with bridging packing, which enhances the permeability and water-soil interactions upon immersion. This study provides a microlevel understanding of how mica dominates the behavior of WGS and provides new insights into the effective stabilization and improvement of micaceous soils. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | National Natural Science Foundation of China[42177148] ; The opening fund of State Key Laboratory of Geohazard Prevention and Geo-environment Protection[SKLGP 2023K011] ; Postdoctoral Research Project of Guangzhou[20220402] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001298392400001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42414]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Liu, Xinyu |
| 作者单位 | 1.Huazhong Univ Sci & Technol, Sch Civil & Hydraul Engn, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Wuhan Univ Sci & Technol, Coll Urban Construct, Wuhan 430065, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Guangzhou Urban Planning & Design Survey Res Inst, Guangzhou 510000, Peoples R China 6.Guangdong Enterprise Key Lab Urban Sensing Monitor, Guangzhou 510000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xianwei,Liu, Xinyu,Gao, Haodong,et al. Impact of mica on geotechnical behavior of weathered granitic soil using macro and micro investigations[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(6):2250-2266. |
| APA | Zhang, Xianwei,Liu, Xinyu,Gao, Haodong,Wang, Gang,An, Ran,&Liang, Zhu.(2024).Impact of mica on geotechnical behavior of weathered granitic soil using macro and micro investigations.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(6),2250-2266. |
| MLA | Zhang, Xianwei,et al."Impact of mica on geotechnical behavior of weathered granitic soil using macro and micro investigations".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.6(2024):2250-2266. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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