Specific ion effects on the soil shear strength and clay surface properties of collapsing wall in Benggang
Bifei Huang, Maojin Yang, Honglin Zhong, Jinshi Lin, Fangshi Jiang, Ming-kuang Wang, Yue Zhang, Yanhe Huang
TL;DR
This study examines how different ions affect soil strength and erosion in Benggang, a type of soil erosion in China, to help develop better treatment strategies.
Contribution
The study identifies specific ion effects on soil shear strength and clay surface properties in Benggang soils.
Findings
Red soil showed higher clay content and shear strength compared to sandy and detritus soils.
K+, NH4+, and Cs+ ions increased soil cohesion and zeta potential more than Li+ and Na+.
Specific ions significantly influenced clay surface properties and soil stability in Benggang.
Abstract
Benggangs are a special type of soil erosion in the hilly granite regions of the tropical and subtropical areas of Southern China. They cause severe soil and water loss, which can severely deteriorate soil quality and threat to the local ecological environment. Soils (red soil, sandy soil and detritus soil) were collected from collapsing wall of a typical Benggang in Changting County of Fujian Province, and their physicochemical and mineralogical properties were analyzed. Five different monovalent cations were used to saturate the soil samples to examine the specific ion effects on the shear strength and clay surface properties. Red soil had a higher clay content, plastic limit, liquid limit and shear strength than sandy soil and detritus soil. The studied soils mainly consisted of kaolinite, hydroxy-interlayer vermiculite, illite and gibbsite clay minerals. The soils saturated with K+,…
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Taxonomy
TopicsLandslides and related hazards · Geotechnical Engineering and Soil Mechanics · Geophysical Methods and Applications