Cyclic Cum Static Triaxial Test System

Cyclic Cum Static Triaxial Test System

Cyclic Cum Static Triaxial Test System

Introduction

The system is a highly advanced combination of hydraulic and pneumatic technology where σ1 is applied through hydraulic system in dynamic tests and σ2 & σ3 are applied through pneumatic system. It is totally based on Close Loop principle. The processing of the pre-programmed signal and machine response signal in the P.I.D. Controller is at the speed of 10 KHz. This keeps the machine working within the limits of ± 1% of the programmed signal. Confining pressure & Back pressure are also controlled through computer and operates on close loop control mechanism.

The system is capable of performing following tests as per relevant standard ASTM/BS/AASHTO/IS etc.: Saturation, consolidation, UU, CU, CUBar, CD Triaxial tests with pore pressure and Volume change measurement, Isotropic and Anisotropic tests, Stress & Strain Path control tests, Liquefaction test, Stress Controlled Cyclic Triaxial strength of soils, Strain Controlled Cyclic Triaxial strength of soils, determination of modulus and damping properties of soils, Resilient Modulus of soils etc. (Optional- Ko consolidation tests & Bender Element tests)

Salient Features

  • Based on SERVO CONTROLLED HYDRAULIC CLOSED LOOP FEEDBACK mechanism
  • Conforming to stringent requirement as per the International norms (ASTM 3999 & ASTM 5311)
  • Fully Computer Controlled operation to control Axial Loading, Cell Pressure & Back pressure with User friendly Software
  • Stress / Strain Controlled Cycling from 0.01 Hz to 10 Hz with 128 data sets per second
  • Dynamic Loading Range ± 50N to ± 9kN (Higher loads on request)
  • Suitable for Controlled Axial Loading in Stress/ Strain basis in Static Triaxial testing to conduct UC, UU, CU, CUBar, CD tests
  • Facility to study Liquefaction behavior of soil
  • Digitally controlled Pressure Controllers for applying Confining and Back Pressure Range 10kPa – 1000kPa (Standard)
  • Suitable Triaxial cell to accommodate Sample Sizes up to 100mm diameter x 200mm height and a Cell pressure of 1000kPa (Standard)
  • Online Plotting of Graphs ( Load v/s Displacement, Load v/s Time, Displacement v/s Time) with real time display of data
  • Advanced Analysis Software as per ASTM 3999 & 5311 for Cyclic testing and Routine Static Triaxial testing

The Scope of Supply include :

  • Load Frame with Hydraulic Actuator Hydraulic Power Supply
  • Triaxial Cell with accessories
  • Automatic Pressure system with Compressor and De-airing system
  • PC based Control system and Application Software
    • Signal Conditioning and Controlling Unit with Transducers
    • Computer for Controlling and Data acquisition
    • Control & Analysis software

Load Frame

Loading Frame is free standing two pillar type unit. It has a base and a cross head with fitted actuator along with servo valve. Cross head carrying theHydraulic Actuator for conducting dynamic tests is
movable on threaded columns to adjust the height of the sample. Arrangement is also provided for locking
of the crosshead at any desired position. An electromechanical system consisting of highly precise servo
motor is provided for conducting routine static tests. Static and dynamic loading would be fully computer
controlled. It can accommodate Triaxial cell for sample sizes up to 100mm diameter & 200mm height.

Technical Specifications:-
Load carrying capacity : 50kN
Triaxial Cell accommodate : Up to 100mm diameter & 200mm height
Horizontal clearance : 350mm
Vertical clearance : 900mm
Platen Diameter : 150mm or more
Ram Speed : 0.00001-9.9999 mm/min.