Triaxial shear speed determination

[Tinus_Grobler]

We are having some triaxial testing conducted on sensitive clays.
During the consolidation stage the volume changes took place fairly quickly, but it took quite long for the excess pore pressures to dissipate.
I am well acquainted with determining the shear speed using the t100 (volume change) method. But am concerned that the shear speed would be too high.

Is there an alternative method where the pore pressure dissipation is used to determine the shear speed?

Thanking you in advance!

Kind regards

 

[morecoffeeplz]

Can you plot the PWP dissipation vs time?

 

[LRJ]

If you've undertaken a consolidation stage (i.e. drained; volumetric change), then why do you have excess pore-water pressure (i.e. undrained)? This is a little worrying.

With regard to consolidation time, t50 (and similar) is supposed to represent the time to dissipate 50% (or whatever the subscript number is) of excess pore-water pressure. I'm unsure what volumetric approach you are referring to, but this seems to be the more unusual approach.