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.
Technical Specs
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 320×240 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
Accessories
ACCESSORIES FOR ELASTIC MODULUS
Compressometer-Extensometer for Elastic Modulus determination
Strain gauges
Axial-circumferential compression device
TESTING FIBER REINFORCED CONCRETE AND SHOTCRETE
Measurement of beam deflection and toughness
Displacement transducer for measurement of crack opening
Energy absorption test on slabs
CONCRETE COMPRESSION FRAMES
ASTM C39, AASHTO T22 Compression frames
EN 12390-4, EN 772-1 Compression frames
General utility compression frames
CEMENT COMPRESSION FRAMES
Compression-flexure cement testing frames
Compression-flexure cement testing frames, multipurpose models
FLEXURE FRAMES
High stiffness flexural frame, 200 kN cap., SIMPLEX
High stiffness flexural frame, 200 kN cap., DUPLEX
High stiffness flexural frame, 350 kN cap., SIMPLEX
High stiffness flexural frame, 350 kN cap., DUPLEX
Universal, open structure flexural frame, 300 kN cap.
PC CABINET
86-D2999
Cabinet for PC and printer with three extractable shelves to hold keyboard, printer and mouse. Complete with dust prevention system with two vented filters in the cabinet housing the PC. 230 V, 50 Hz, 1 ph
