triaxial test

[mmaha]

please, can any one told me what is the difference between single stage and three stage triaxial test.
Memo
thanks.

 

[GeoPaveTraffic]

In a three stage test, the same sample is tested at three different confining pressures. The first two stages are ran to a strain that approaches but does not cause failure. The third stage is strained to failure.

A single stage test is run at a single confining pressure to failure.

Mike Lambert

 

[mmaha]

THANK YOU VERY MUCH MIKE.

 

[morecoffeeplz]

The three stage test in most cases results erroneously high phi values as the two lower stresses are rarely taken out far enough for fear of failing the specimen.