A New Method for Evaluating the Homogeneity and Structure of Remolded Loess Samples with the Air Permeability Coefficient
文献类型：期刊论文
| 作者 | Hao, Zhitao2; Li, Xi'an2,3; Gao, Rongrong2; An, Mingxiao2; Zhang, Jing2; Wen, Feng2; Zhou, Bingquan2; Xue, Quan1 |
| 刊名 | APPLIED SCIENCES-BASEL
 |
| 出版日期 | 2022-10-01 |
| 卷号 | 12期号:19页码:- |
| 关键词 | Malan loess air permeability coefficient laboratory test uniformity soil structure |
| 英文摘要 | The uniformity of remolded loess samples prepared in the laboratory directly determines the reliability of various test results. While many tests have been designed to reflect the properties of undisturbed loess, there are obvious structural differences between remolded and undisturbed loess. Therefore, it is of great theoretical and practical significance to explore a non-destructive evaluation index of the uniformity and structure of loess samples for indoor geotechnical tests. In this study, the loess from the Malan loess section of the Chanhe River in Xi'an, China, was used as the experimental material to analyze the uniformity of remolded loess samples in terms of the stress distribution, stratification range, and sample variance. Based on the test results, the feasibility of using the air permeability coefficient as an index by which to evaluate the uniformity and structure of loess samples is investigated for the first time. The results demonstrate that when the overall height of the sample is fixed, the higher the designed dry density of the sample and the lower the air permeability of the sample. Moreover, when the designed dry density of the sample is constant, with the increase in the overall height of the sample, the range of the stratified dry density of the sample gradually decreases, as does the sample variance. The more uniform the sample, the greater the air permeability, and under the same conditions, the air permeability of remolded soil is lower than that of undisturbed loess. SEM images reveal that there is a considerable difference between the structures of undisturbed and remolded loess samples. Remolded loess is characterized by the greatly reduced effectiveness of cementation between skeleton particles, which causes its structure to be weaker than that of undisturbed loess. In this paper, a quantitative index of loess structure based on air permeability is proposed, and the test results show that the index can adequately reflect the loess structure. Due to its obvious advantages of non-destructiveness, high efficiency, economy, convenience, and high speed, it has a unique advantage for the evaluation of the uniformity and structure of remolded soil samples. |
| 学科主题 | Chemistry ; Engineering ; Materials Science ; Physics |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000866639100001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35142]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 2.College of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, China 3.Open Research Laboratory of Geotechnical Engineering, Ministry of Land and Resources, Xi’an 710054, China |
| 推荐引用方式 GB/T 7714 | Hao, Zhitao,Li, Xi'an,Gao, Rongrong,et al. A New Method for Evaluating the Homogeneity and Structure of Remolded Loess Samples with the Air Permeability Coefficient[J]. APPLIED SCIENCES-BASEL,2022,12(19):-. |
| APA | Hao, Zhitao.,Li, Xi'an.,Gao, Rongrong.,An, Mingxiao.,Zhang, Jing.,...&Xue, Quan.(2022).A New Method for Evaluating the Homogeneity and Structure of Remolded Loess Samples with the Air Permeability Coefficient.APPLIED SCIENCES-BASEL,12(19),-. |
| MLA | Hao, Zhitao,et al."A New Method for Evaluating the Homogeneity and Structure of Remolded Loess Samples with the Air Permeability Coefficient".APPLIED SCIENCES-BASEL 12.19(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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