A $1-$D oedometer $($consolidation$)$ test data is given below. The consolidation pressure is selected

as ${}_v^{\text{'}}=100$kPa. Using the Casagrande's method and the data given below, plot "vertical

compression $($d$)-$ log time $($t$)"$ graph, and find the coefficient of consolidation, $c_v,$ of this soil,

at ${}_v^{\text{'}}=100$kPa. In your plot, the y$-$axis should be plotted with "increasing values in the

downward direction".

$($Note: At the very beginning of the consolidation test, the initial height of the soil specimen

was measured as $19mm,$ and the vertical displacement $($d$)$ values given below, are cumulative

values, i$.$e$.,$ the measured vertical compression values include the vertical compressions that

occurred under the previous vertical pressures on the specimen. Therefore, the height of soil

specimen at any time $"t"$ is equal to "initial height $-d").$