Model Test on Self-Weight Consolidation of the Red Mud Tailings Placed in the Karsts |
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| Authors: | Jiequan Li Xiaoduo Ou |
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| Institution: | 1.College of Civil Engineering and Architecture,Guangxi University,Nanning,China;2.Ministry of Education Key Laboratory of Disaster Prevention and Structural Safety,Guangxi University,Nanning,China;3.Guangxi Ruiyu Construction Technology Co., Ltd,Nanning,China |
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| Abstract: | The management of tailings depends on its consolidation behavior to great extent. The red mud tailings in Pingguo, Guangxi is of high water content and void ratio. The present paper takes the red mud aluminiferous tailings in Pingguo, Guangxi as prototype. Model tests were carried out to study the consolidation behavior of red mud aluminiferous tailings that were landfilled layer by layer. The layered settlement and the water discharge caused by self-weight consolidation were studied. The influence of the latter landfilled layer of red mud on the previous layer was analyzed. The results show that the settlement at the surface with time can be divided into two stages. During the first stage, a thin layer of water appeared and the thickness kept increasing at the top of the mud surface with the particle of red mud sinking. During the second stage, water drained from the mud and settlement developed slowly. Cracks developed at the surface due to evaporation and the red mud near the surface became unsaturated. When the previous landfilled layer consolidated to the degree that the water content was less than 40%, the later landfilled layer of red mud will have little influence on the settlement of previous landfilled layer. |
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