The observed swelling dial reading recorded in Table 1 shall be plotted with elapsed time as abscissa and swelling dial reading as ordinates on natural scale. A smooth curve shall be drawn joining these points. If the curve so drawn becomes asymptotic with the abscissa, the swelling has reached its maximum and swelling phase shall be stopped, and the consolidation phase shall be started. The compression readings shall be tabulated as in Table 3 and a plot of change in thickness of expanded specimen as ordinates and consolidation pressure applied as abscissa in semi-logarithmic scale shall be made. The swelling pressure exerted by the soil specimen under zero swelling condition shall be obtained by interpolation and expressed in kN/m2 (kgf/cm2).
1 The difference between the final and initial dial readings of the proving ring gives total load in terms of division which when multiplied by the calibration factor gives the total load. This when divided by the cross-sectional area of the soil specimen gives the swell pressure expressed in kN/m2 (kgf/cm2).
| Date Strain Dial | Time | Gauge Reading Before Adjustment | Proving Ring Reading | Differences | Load in kg | Swell Pressure in kg/cm2 | Remarks |
|---|---|---|---|---|---|---|---|