Recompression Index
The recompression index Cr is determined from the graph representing the variation of void ratio e as a function of the effective stress σef plotted in the logarithmic scale for unloading - reloading sequence:
Determination of recompression index Cr
where: | Δe | - | change of void ratio for the unloading-reloading curve |
Δlogσef | - | change of effective stress for the unloading-reloading curve |
If no results from either laboratory or in situ measurements are available, the recompression index Cr can be approximately derived from:
where: | Cc | - | compression constant |