Thank you LRJ and f-d. Classification of the sample was verified using D2487 that it is Silty Clay. The sample was collected from below a river, undisturbed (using a shelby tube).
Sorry for the confusing data shown in my previous post. Attached is a better presentation.
https://files.engineering.com/getfile.aspx?folder=8222f026-f36f-428e-adfa-9571bd388b66&file=Test_Summary.pdf
The following is a summary of a primary consolidation test on a silty clay with trace sand & gravel.
Load, psf Strain Void Ratio t50, min Cv, ft2/day
100 0.00 0.51 0.00 N/A
500 0.41 0.51 1.00 0.40
1000 0.90 0.50...
