"Hellenic Petroleum" Building
274A, Tosin Bunar str.
New Belgrade


Terms of Use / Uslovi Korišćenja

GDS Triaxial Automated System (GDSTAS)

The GDS Triaxial Automated System (GDSTAS) is a load frame-based triaxial testing system which may be configured exactly to the customers specification and budget. Using the GDS range of load frames, triaxial cells, pressure systems and the GDSLAB software, the basic system can be configured for low cost multi-station commercial testing right through to high range rock testing at research level. Using GDSLAB with optional software modules, GDSTAS can run advanced tests such as stress paths, slow cyclic and K0, all under PC control.


GDS pressure/volume controllers are used to apply cell pressure, back pressure, and also to measure the sample volume change resolved to 1cc. Using the GDS pressure/volume controller there is no requirement for the 'old type' bladder volume change gauges.

The GDSLAB software suite allows the user complete flexibility on how the system can be setup with multiple stations allowable.

This system can be configured using any GDS devices, from a 50kN to 500kN load frame and from a 500kPa to 150MPa pressure controller. On-sample transducers, bender elements and unsaturated testing can all be added, as you would expect from a GDS system.




What are its uses

The operator chooses the type of test from a test menu (eg UU, C-U, multi-stage, stress path etc) and then enters the test parameters (of cell pressure, back pressure, testing rate and so on) and test termination conditions.

The test then proceeds automatically with all test data being saved to a file. On-line graphics are presented with up to three graphs displayed together with a block of current live test data. Tests can proceed overnight and during weekends and holidays. To enable spot-verification, all electronic measurements may be duplicated by mechanical gauges.

The computer directly controls the cell pressure, back pressure and testing rate. In addition to logging these parameters to the PC hard drive, the computer also logs axial displacement, axial load, pore pressure and volume change. Of course, additional transducers may be easily configured and logged during the test.