I'm trying to get the compressive strength (and Young's modulus) of a clay sample.
The method I found is called 'Unconfined Compressive Strength of Cohesive Soil'. According to ASTM D2166M, I have to set the loading rate to 0.5-2%/min (axial strain).
The machine I have though, is stress-controlled. It measures the load in Pa/s.
Since concrete samples can be tested through a similar method; is there a method that I can use to measure the elastic modulus and/or compressive strength of the clay using something with a rate of Pa/s?
For example, if I set the loading to something very low (e.g 1Pa/s) will I get acceptable results? (Note: for concrete it is acceptable to use 0.15MPa/s)