抄録
To evaluate the efficiency of fluid mud disposal in the case of one-dimensional forced dewatering, effects of applied load and clay type on forced dewatering behaviors are examined experimentally. On the basis of the test results, simple semiempirical formulae of forced dewatering are presented. The dewatering velocity is expressed by υpa, and the time necessary for sufficient dewatering by τp-βH02, where p is the applied load and H0 is the initial thickness of fluid mud. The coefficients υ and τ are markedly influenced by the clay type and less strongly influenced by the initial water content. The lower the activity of the fluid mud, the faster the dewatering proceeds.Analytical examinations of the disposal efficiency suggest that there exists an optimum thickness of fluid mud. A higher disposal efficiency can be attained when the initial thickness is near the optimum value, when the initial water content is lower, and when the applied load is higher. The optimum thickness can be predicted for any fluid mud when the value of coefficient τ, the applied load p, and a property of disposal machine are given.
