(Solved): ss A consolidation test was performed on a 25mm thick undisturbed clay sample. 50% consolidat ...

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A consolidation test was performed on a $$25\mathrm{mm}$$ thick undisturbed clay sample. $$50\%$$ consolidation. occurred in 5 minutes. The sample was drained both at the top and at the bottom. In the field, the clay layer is $$2.4\mathrm{m}$$ thick and is underlain by an impervious rock. Drainage is possible only at the top surface : (i) Determine the coefficient of consolidation (ii) Calculate the time in days for $$50\%$$ and $$90\%$$ consolidation to take place in the field deposit. 5