I would like to find out what type of a triaxial test is a monotonic triaxial? Is this the basic Compression triaxial (CU,CD,UC,UU) as opposed to Cyclic stress triaxial?
Monotonic triaxial tests are loaded in one direction only until they reach failure, however that is defined. Cyclic triaxial tests undergo cyclic loading, whereby the direction of loading is reversed, typically multiple times until a defined failure limit is reached.
So yes, a monotonic triaxial is a 'basic' triaxial.