干旱区生态环境知识资源中心(Arid): Microstructure and water-swelling mechanism of red-bed mudstone in the Xining region, Northeastern Tibetan Plateau

Arid

DOI	10.1016/j.jrmge.2023.11.0311674-7755
	Microstructure and water-swelling mechanism of red-bed mudstone in the Xining region, Northeastern Tibetan Plateau
	Guan, Huan; Ren, Yong; Ling, Sixiang; Wu, Xiyong; Yu, Tao; Li, Xian; Wang, Sen; Sun, Chunwei
通讯作者	Ling, SX
来源期刊	JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
ISSN	1674-7755
EISSN	2589-0417
出版年	2024
卷号	16 期号:7 页码:2537-2551
英文摘要	This paper examines the effect of the microstructure and electrical conductivity (EC) on the swelling ratio and pressure in red-bed mudstone sampled from arid areas in the Xining region in the northeastern Tibetan Plateau. A series of laboratory tests, including swelling experiments, X-ray diffraction (XRD), and scanning electron microscope (SEM), was carried out for mechanical and microstructural analysis. The coupled influence of the EC and microstructural parameters on the expansion ratio and pressure was investigated, and the weight coefficients were discussed by the entropy weight method. The results revealed an increasing exponential trend in EC, and the maximum swelling speed occurred at an EC of approximately 10 mu S/cm. In addition, a method for predicting the expansion potential is proposed based on the microstructure, and its reliability is verified by comparing with swelling experimental results. In addition, according to the image analysis results, the ranges of the change in the clay minerals content (CMC), the fractal dimension (FD), the average diameter (AD) of pores, and the plane porosity (PP) are 23.75%-53%, 1.08-1.17, 7.53-22.45 mu m, and 0.62%-1.25%, respectively. Moreover, mudstone swelling is negatively correlated with the plane porosity, fractal dimension and average diameter and is linearly correlated with the clay mineral content. Furthermore, the weight values prove that the microstructural characteristics, including FD, AD, and PP, are the main factors influencing the expansion properties of red-bed mudstones in the Xining region. Based on the combination of macro and micro-analyses, a quantitative analysis of the swelling process of mudstones can provide a better reference for understanding the mechanism of expansion behavior. (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/).
英文关键词	Mudstones Microstructure Swelling characteristics Electrical conductivity (EC) Scanning electron microscope Water-swelling
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001270306600001
WOS关键词	ELECTRICAL-CONDUCTIVITY ; SUGGESTED METHODS ; CLAY ; BEHAVIOR ; PERMEABILITY ; DESATURATION ; RESATURATION ; COMPACTION ; POROSITY ; ROCK
WOS类目	Engineering, Geological
WOS研究方向	Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404682
推荐引用方式 GB/T 7714	Guan, Huan,Ren, Yong,Ling, Sixiang,et al. Microstructure and water-swelling mechanism of red-bed mudstone in the Xining region, Northeastern Tibetan Plateau[J],2024,16(7):2537-2551.
APA	Guan, Huan.,Ren, Yong.,Ling, Sixiang.,Wu, Xiyong.,Yu, Tao.,...&Sun, Chunwei.(2024).Microstructure and water-swelling mechanism of red-bed mudstone in the Xining region, Northeastern Tibetan Plateau.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(7),2537-2551.
MLA	Guan, Huan,et al."Microstructure and water-swelling mechanism of red-bed mudstone in the Xining region, Northeastern Tibetan Plateau".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.7(2024):2537-2551.