General Description

Automatic hydraulic systems for static and low frequency dynamic tests on building materials under control of Load/Stress, Displacement, Strain. Idea...
Read More

Description

Automatic hydraulic systems for static and low frequency dynamic tests on building materials under control of Load/Stress, Displacement, Strain.
Ideal both for traditional tests, such as compression and flexure on concrete, cement, mortar, blocks etc. and cyclic tests for the determination of secant elastic modulus (E), and also for measuring, for example, the ductility and fracture energy of concrete reinforced with fibres (FRC) and lined with polymers (FRP), or the toughness of sprayed concrete slabs (shotcrete) under concentrated load tests. The console is connectable to up to four test  frames.
 

Products

Code
Description
Units

Technical Specifications

Hydraulics

  • Max working pressure: 720 bar.
  • Hydraulic motorized power pump with automatic double stage mode: low pressure/high flow rate (2l/min) for the fast approach (min.40mm/ min) and high pressure/low flow rate (0.7 l/min) for test execution.
  • Wide flow rate range allowing the control of several frames with different capacities from 15kN up to 5000kN.
  • Forced ventilation oil cooling system.
  • High efficiency oil filtering system with anomalies warnings (e.g.low oil level and dirty oil filter).
  • Oil flow regulated by servo controlled proportional valve with high fre­quency driving signal.
  • 2 (extendable to 4, see upgrading options) electronic ON/OFF valves for remote automatic selection via PC of the active frame.


Hardware and firmware                   

  • 8 active channels (each one can be used by the machine as feedback variable to control test execution):
    • 4 for load sensors (load cells or pressure transducers)
    • 4 for displacement transducers (potentiometric, LVDT amplified, magnetostrictive) and deformation transducers (strain gauge)
  • Effective resolution 132.000 divisions, Closed loop control with high frequency PID.
  • Control frequency: up to 120 Hz      
  • Electrical characteristics of the chan­nel conditioners: Feed from 0.5 to 10V DC (digital selection)
    • Single-/dual-ended input with automatic detection
    • Input signal from -2.5 to +2.5V DC
    • Zero and gain digitally adjustable
  • Data acquisition synchronized on all channels
  • Calibration of the 8 channels in engineering units, via linearization function (up to 10 steps) which allows optimisation of readings accuracy over the whole test range.


User interface
The system is controlled via the PC. An alphanumerical keyboard and an icon driven display are also provided for factory settings and use of unit in local mode.

  • Graphical display 320x240 pixel


Software
The PC allows:

  • Remote control of the complete system (Console and Frame) for automatic test execution
  • Real time and deferred management of tests data and results, either in numeric and in graphic format
  • Active frame selection via software
  • Printing and saving of customized test reports both for single and batch tests in Excel format

The followign software packages are included:

Software for compression, flexural, splitting tests to EN and ASTM Standards. 

Software for determination of Elastic Modulus on concrete and cement allowing:

  • User-defined test cycles and step programmable sequences
  • Real-time display of stress/ time and stress/axial strain diagrams
  • Automatic verification of sample centering, as per standards requirements


Software for displacement/strain controlled tests allowing:

  • Free unlimited programmable load/stress/displacement/strain cycles to fulfil any kind of test procedure
  • Possibility to display different curves in the same graph (for instance it's possible to display 3 different strain curves acquired by 3 different transducers in one graph with the same time axis)
  • Real time display and monitoring of all test data
  • Real time variation of settings, including the control method (load, displacement or strain), active channel used as feedback variable, load/displacement/strain rate, target valve
  • Constant load/displacement/strain function with closed loop feedback assuring precise holding of the target value


Physical specifications

  • Power rating: 750 W
  • Dimensions (lxwxh): 470x410x1000 mm
  • Weight approx.: 120 kg

Standards

  • EN 12390-4
  • ASTM C39
  • ASTM C469
  • EN 14488-5
  • EN 14651
  • ASTM C1550
  • EN 1338
  • EN 1339
  • EN 1340
  • ASTM C1609
  • EN 12390-13

Accessories and Spare Parts

Code
Description
Units

Videos

Retrofit in three easy steps