Hello everyone
I have two plots belong to cemented sand and approximately got saturated around B values of 90% by back-pressure which then was subjected to UU triaxial test with 0.5 mm/min of strain rate , I am curious that at all all around pressures of 50 , 100 , 150 kPa , the deviatoric stress Vs axial strain in figure one for less amounts of cement shows usual behavior as all around pressure dependent but in second graph as cement percent increased the preliminary part of graph which consists of different values of all around pressures overlap with one another, what are the reasons?
I appreciate your kind replies