Rheological behavior of dredged slurries at high water contents |
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| Authors: | Gui-Zhong Xu Ying Zhang Ruo-Bing Sun |
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| Institution: | 1. Department of Civil Engineering, Yancheng Institute of Technology, Yancheng, P. R. China;2. Geotechnical Research Institute, Hohai University, Nanjing, P. R. China;3. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, P. R. China;4. Geotechnical Research Institute, Hohai University, Nanjing, P. R. China;5. College of Civil Engineering, Tongji University, Shanghai, P. R. China |
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| Abstract: | Each year in the world, there is significant amount of dredged slurries generated during geotechnical jobs. In the slurry storage process, the rheological behavior is a key factor affecting the motion of dredged slurries. To gain better understanding on this behavior, experiments on dredged slurries with different liquid limits are conducted using rotary viscometer. It has been found that, as water content increases, slurry property can change from Bingham plastic fluids to Newtonian fluids. In log–log coordinates, their corresponding yield stress and plastic viscosity are in linear relationship with their water contents and the intersection of these two lines can be treated as the turning point which is 4.7 times the liquid limit. The yield stress and plastic viscosity of different dredged slurries can be normalized efficiently using normalized water content. So, in this paper, a new quantitative prediction method for yield stress and plastic viscosity is proposed, which is effective for use in alkined modes of motion, is proposed. |
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| Keywords: | Bingham plastic fluids dredged slurry Newtonian fluids plastic viscosity yield stress |
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