The Application of Vapour Equlibrium Technique in Water Retention Study of Fine Grained Tailings

Abstract:

As a problematic material, fine grained tailings have many particular engineering characteristics and seriously affect the safety and stability of the tailing dam body. These engineering properties are closely related to moisture migration and soil suction under different water content. This article chose fine grained tailings of Li Tie Lan Ting tailings dam in Zhejiang province as an example, and measured the soil water characteristic curve (SWCC) of fine grained tailings with different partical size composition and dry density using vapour equilibrium technique. Efforts have also been made to demonstrate the influences of soil type, dry density on water retention. The study result shows that particle-size composition has a significant impact on SWCCs of the tailings. Finer grained samples have lower water loss rate and higher water-holding capacity than coarse grained samples in the same suction state. Contrary with low suction stage, dry density has negligible influence on the soil suction, and parameters effect SWCCs at high suction stage. The research results may provide a theoretical support and a beneficial reference for further research of fine grained tailingss engineering properties.

• Periodical: Advanced Materials Research (Volumes 838-841)
• Pages: 1785-1790
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.838-841.1785
• Online since: November 2013
• Authors: Qing Hua Jiang, Chen Xiang Yu
• Keywords: Dry Density, Fine Grained Tailings, Soil-Water Characteristic Curve, Water Content

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