Controls Group http://www.controls-group.com/images/logo_controls.gif Automatic Uniaxial and Triaxial test system Automatic Uniaxial and Triaxial test system
close

Automatic Uniaxial and Triaxial test system

ASTM D2664 | ASTM D2938 | ASTM D3148 | ASTM D5407 | EN 14580 | EN 1926 | ASTM D7012
Main features
  • Automatic performance of uniaxial and triaxial tests with individual but combined control of axial load and confining pressure
  • Axial and horizontal stress are increased isotropically up to a defined level in automatic way
  • The 2 consoles are operated independently and the failure envelope is obtained by few individual tests (single - stage) with automatic application of axial load and confining pressure at different levels
  • Cell pressure is maintained constant (± 1%) and axial stress is increased automatically at constant load rate up to specimen failure (single-stage)
  • AUTOMAX Multitest console allows to perform tests under load and strain/displacement console
General description
General description
The Automatic configuration for determining the elastic modulus and strength characteristics of rock specimens under uniaxial and triaxial conditions is based on the AUTOMAX Multitest control console for axial load and SERCOMP 7 for confining pressure. The 2 consoles are operated independently and the failure envelope is obtained by few individual tests (single - stage) with automatic application of axial load and confining pressure at different levels. AUTOMAX Multitest allows to perfom tests under load and strain control.
The confining pressure into the Hoek cell, applied by SERCOMP 7 is also measured by AUTOMAX Multitst for simultaneous plot of all test quantities,  e.g. stress, strain and cell pressure.

Note: For a typical configuration of an Automatic triaxial test system see Additional information.
More +

Technical specifications

AUTOMAX Multitest
The AUTOMAX Multitest consists of an ergonomic control console which houses the power unit and the PC.
 
Specifications
Hydraulics
  • Dual stage pump: centrifugal low pressure for fast approach and automatic switching to radial multi-piston high pressure for loading
  • DC motor. 720 W, 50-60 Hz
  • Maximum working pressure 650 bar
  • Third and fourth frame option, active frame selection by software
  • Flow-sharing technology to perform loading and unloading cycles
  • ES Energy Saving technology to reduce power consumption and silent operation
Hardware
  • 131.000 points effective resolution
  • Closed-loop P.I.D. control
  • 4 channels for load sensors (pressure transducers/load cells)
  • 1 channel for confining pressure (acquisition only)
  • 6 channels for strain/displacement transducers (potentiometers, magnetostrictive, LVDTs)
  • 3 channels for strain gauges
  • Memorization of the calibration curve enables sensors to be connected and used immediately
  • Digital linearization of the calibration curve (multi-coefficient)
 
SERCOMP 7
The hydraulic unit SERCOMP 7 controls the lateral pressure in the Hoek cell in case of triaxial testing. A cooling device is incorporated, for superior control and uniformity of pressure throughout the test.
The control console includes a large graphic display with a mem­brane keyboard allowing easy setting and test monitoring.
 
Specifications
Hydraulics
  • Maximum working pressure: 700 bar
  • Maximum oil delivery: 0.7 litres/min
  • Flow control: by servo-valve system
  • Hydraulic ports: 2
  • Power: 750 W
  • Voltage: 230 V, 50 Hz, 1 ph (other voltages are available - see Ordering info)
  • Dimensions: 470x410x1000 mm(d x w x h)
  • Weight: 120 kg (approx.)
 
Hardware
  • Large graphic display with a mem­brane keyboard for inputting test data
  • 65.000 points effective resolution
  • Closed-loop P.I.D. control

Ordering info

AUTOMAX E Modulus

50-C20M82 
AUTOMAX Multitest stand alone power and control console.
230 V, 50-60 Hz, 1 ph

50-C20E84 
AUTOMAX Multitest stand alone power and control console.
110 V, 60 Hz, 1 ph
 
 
SERCOMP 7

45-C7022/S
SERCOMP 7 Servo-hydraulic control console for lateral pressure to perform triaxial rock testing.
230V, 50 Hz, 1ph.   
                            
45-C7023/S
SERCOMP 7 Servo-hydraulic control console for lateral pressure to perform triaxial rock testing.
220 V, 60 Hz, 1 ph.

45-C7024/S
SERCOMP 7 Servo-hydraulic control console for lateral pressure to perform triaxial rock testing.
110 V, 60 Hz, 1 ph.

Accessories

Please refer to the links to other products below for more technical and commercial info about:
  • AUTOMAX Multitest console
  • Compression frames
  • Hoek cell and sample extruder
  • Strain gauges for uniaxial and triaxial tests
  • Compression device for uniaxial tests

Additional Information

TYPICAL CONFIGURATION OF AN AUTOMATIC SYSTEM FOR UNIAXIAL AND TRIAXIAL TESTS ON ROCK SPECIMENS
 
AXIAL LOAD UNIT
Code Description Uniaxial
Q.ty
Triaxial
Q.ty
50-C20M82 AUTOMAX Multitest control console 1 1
82-SW/EM
E-MODULE software package for Elastic modulus and Poisson ratio determination   
1 1
50-C56Z00 3000 kN cap. EN compression frame 1 1
50-C0050/CAL Special calibration procedure of load digital uinit assuring Class 1 from 1% of full scale 1 1
50-C59/EK 
Explosion proof test kit comprehending: safety 
cables securing the upper platen to the frame, 
metallic perforated fragment guard and bottom  
platen anti-fall safety system (for compression machine series 50-C56xxx               
1 1
50-C9086/P Distance piece dia. 200x100 mm with threaded centering pin 1 -
50-C9083/P Distance piece dia. 200x68 mm with threaded centering pin 2 1
 
CONFINING PRESSURE UNIT
Code Description Uniaxial
Q.ty
Triaxial
Q.ty
45-C7022/S SERCOMP 7 Rock servo-hydraulic pressure control console - 1
45-R0023 Three way connector - 1
82-P0700 Pressure transducer, 700 bar capacity - 2
82-P0349/ELT Connection cable - 2


HOEK CELLS (different models available. We propose NX model)
Code Description Uniaxial
Q.ty
Triaxial
Q.ty
45-D0556 Hoek cell, NX, 54.7 mm dia. - 1
45-D0556/A Pair of load spreader - 1
45-D0556/B Distance pad - 1
45-D0556/1 Spare rubber membrane - 5
45-D0577/B Rock sample extruder - 1
45-D0577/4 Extruder adapter set for NX specimens - 1
45-D0556/H Holding device for Hoek cell - 1
 
UNIAXIAL COMPONENT
Code Description Uniaxial
Q.ty
Triaxial
Q.ty
45-D9035 Compression device for samples up to 55mm diameter x 110 mm height 1 -


STRAIN READING AND CONTROL (select the suitable strain gauges within the models listed below)
Code Description Uniaxial
Q.ty
Tiaxial
Q.ty
82-P0398 Electric device to complete and compensate up to four Wheatstone bridges with ¼ or ½  bridge set up 1 1
82-P0399/C Strain gauge application kit 1 1
82-P0399/1 Connecting terminals. 50 pairs sheet 1 1
82-P0390 Strain gauge, grid width 4.53x9.53 mm. Pack of 10 1 1
82-P0391 Strain gauge, grid width 3x20 mm. Pack of 10 1 1
82-P0392 Strain gauge, grid width 2x30 mm. Pack of 10 1 1
82-P0393 Strain gauge, grid width 1x60 mm. Pack of 10 1 1
82-P0070/3 MS EXCEL Template for stress/strain analysis, Elastic Modulus and Poisson’s ratio processing in uniaxial and triaxial tests (single stage) 1 -

Documents

Partner's Documents