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DOI	10.1007/s11069-021-04570-7
	The physical–mechanical properties degradation mechanism and microstructure response of acid–alkali-contaminated Xiashu loess
	Sun S.; Wang W.; Wei J.; Song J.; Yu Y.; He W.; Zhang J.
发表日期	2021
ISSN	0921030X
起始页码	2845
结束页码	2861
卷号	106 期号:3
英文摘要	Water pollution has changed the physical and mechanical properties of Xiashu loess, which has become an important factor in the frequent occurrence of Xiashu loess landslides. In order to understand the mechanism of Xiashu loess landslide in acid or alkali environment, a large number of Xiashu loess samples were collected in Nanjing City, Jiangsu Province. X-ray diffraction, energy-dispersive analysis of X-ray, compression test, direct shear test, and scanning electron microscope test (SEM) were used to analyze physical properties, mechanical properties, and microstructure of acid–alkali-contaminated Xiashu loess. The results show that the newly formed insoluble (slightly soluble) substances in the alkalization Xiashu loess increase its density and decrease the void ratio and water content. In sulfuric acid solution, the minerals in Xiashu loess mainly suffer dissolution reactions, which leads to decrease in soil density and increase in void ratio and water content. In the SEM image, the surface of acidified Xiashu loess soil particles is rough and uneven, while the surface of alkalized Xiashu loess soil particles is smooth and flat. This is an important reason that the internal friction angle of acidified Xiashu loess is significantly higher than that of alkalized Xiashu loess. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
关键词	Acid–alkali environment Material composition Mechanical properties Microstructure Xiashu loess
英文关键词	alkalinity; degradation; landslide; loess; mechanical property; microstructure; physical property; scanning electron microscopy; sulfuric acid; void ratio; China; Jiangsu; Nanjing [Jiangsu]
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206591
作者单位	School of Earth Sciences and Engineering, Hohai University, Nanjing, 210098, China; Jiangsu Province Geological Survey Institute, Nanjing, 210018, China
推荐引用方式 GB/T 7714	Sun S.,Wang W.,Wei J.,等. The physical–mechanical properties degradation mechanism and microstructure response of acid–alkali-contaminated Xiashu loess[J],2021,106(3).
APA	Sun S..,Wang W..,Wei J..,Song J..,Yu Y..,...&Zhang J..(2021).The physical–mechanical properties degradation mechanism and microstructure response of acid–alkali-contaminated Xiashu loess.Natural Hazards,106(3).
MLA	Sun S.,et al."The physical–mechanical properties degradation mechanism and microstructure response of acid–alkali-contaminated Xiashu loess".Natural Hazards 106.3(2021).