The Influence of Overburden Stress and Molding Water Content on the Microstructure of Remolded Loess
文献类型：期刊论文
| 作者 | Qi, Zhiyu1,2,3; Li, Zhiqing1,2,3 |
| 刊名 | SUSTAINABILITY
 |
| 出版日期 | 2023-08-01 |
| 卷号 | 15期号:16页码:20 |
| 关键词 | remolded loess molding water content one-dimensional consolidation fractal dimension microstructure pore size distribution (PSD) |
| DOI | 10.3390/su151612401 |
| 英文摘要 | This study aims to reveal the mechanisms of the microstructural evolution of remolded loess under different molding water contents and overburden stresses. Utilizing L6 loess from Yan'an, remolded soil specimens were fabricated under various pressures and moisture contents, followed by conducting one-dimensional consolidation tests. The macroscopic porosity, pore size distribution curves (PSD), and microstructure of these remolded loess samples were examined. Experimental findings indicate that an increase in molding water content leads to an augmentation in macroscopic pore volume and elongated pore shapes, concurrently exerting substantial influence on the primary pore size and pore volume of both macropores (>0.4 mu m) and minipores (0.4-4 mu m), with minimal impact on micropores (<0.4 mu m). The escalation of overburden stress solely contributes to the reduction in pore size and pore volume of macropores. Variations in the Menger fractal dimension occur only beyond the optimal water content, while overburden stress exhibits a minimal effect on the Menger fractal dimension. Furthermore, remolded loess exhibited a certain yield stress, and when the overburden stress was lower than the yield stress, there was almost no change in various types of pores. Finally, a microstructural evolution model of remolded loess under different molding water contents and overburden stresses was proposed. These findings are expected to provide new insights into the microstructural evolution and deformation mechanisms of loess in high embankment construction sites. |
| WOS关键词 | MERCURY INTRUSION POROSIMETRY ; COLLAPSE BEHAVIOR ; EVOLUTION ; SOILS ; QUANTIFICATION ; DIMENSIONS ; PLATEAU |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0904] ; National Natural Science Foundation of China[42177146] ; Science and the Key Research and Development Plan of Yunnan Province[202103AA080013] |
| WOS研究方向 | Science & Technology - Other Topics ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001056708900001 |
| 出版者 | MDPI |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province ; Science and the Key Research and Development Plan of Yunnan Province |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110836]  |
| 专题 | 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
| 通讯作者 | Li, Zhiqing |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi, Zhiyu,Li, Zhiqing. The Influence of Overburden Stress and Molding Water Content on the Microstructure of Remolded Loess[J]. SUSTAINABILITY,2023,15(16):20. |
| APA | Qi, Zhiyu,&Li, Zhiqing.(2023).The Influence of Overburden Stress and Molding Water Content on the Microstructure of Remolded Loess.SUSTAINABILITY,15(16),20. |
| MLA | Qi, Zhiyu,et al."The Influence of Overburden Stress and Molding Water Content on the Microstructure of Remolded Loess".SUSTAINABILITY 15.16(2023):20. |
入库方式： OAI收割
来源：地质与地球物理研究所
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