Core-Rock Compression Testing Machine - Automatic, Capacity : 600 kN

Tests can be performed by either Digital Readout Unit or on a computer with using free Software.
The Automatic Core-Rock Compression Testing Machine allow inexperienced operators to perform the tests. Once the machine has been switched on and the specimen is positioned and centered by the help of centering apparatus. The only required operations are:

• Setting test parameters, including pace rate (only required when the specimen type is changed).
• Pressing the START button on the control unit
  The machine automatically starts the rapid approach, when the specimen touches the upper platen the rapid approach is ended and starts loading at the pace rate that selected by user and stops once the specimen fails.
  Automatically saves the test parameters and test results.

Standards Compliance :

• Complied as per EN 12390-3, 12390-4; BS 1881, ASTM C39

Components :

The Automatic Core-Rock Compression Testing Machines consist of;

• Load Frame
• Automatic Hydraulic Power Pack,
• Digital data acquisition & control system,
• Distance Pieces, ° 165x30 mm, ° 165x50 mm and ° 165x80 mm,
• Upper Platen (with ball seating assembly) °165 mm,
• Lower Platen °165 mm,
• Loading Cylinder Assembly & Limit Switch for safety,
• Front and Rear Protective Doors for safety.
• Software and Ethernet Cable.

Core-Rock Compression Load Frame :

• Load Frame is 600 kN Capacity.
• The dimensions of the 600 kN Load Frame allow the testing of concrete and rock samples up to its capacity.
• The load frame provides the stability needed for accurate and repeatable test results over the years of operation.
• The frames are supplied with factory calibration certificate for force transfer stability and the self-alignment of the upper loading platen conforming to EN 12390-4.
• Upper Platens/Lower Platens:
• Upper Platen (with ball seating assembly) ° 165 mm and Lower Platen ° 165 mm.

The platens enable the testing of a wide variety of cylinder or similar samples.

• Manufactured from high quality steel, which is then hardened, smoothed and finished.
• The roughness value for the surface texture of the auxiliary platens is – 3.2 °m.
• 165 mm Upper Platen (with ball seating assembly) and Lower Platen have centering rings on the lower platens for proper centering of 100 mm and 150 mm cylinder samples.

Distance Pieces :

• Distance pieces are used to reduce the amount of vertical clearance between the upper platen and the lower platen. Supplied with ° 165x25 mm, ° 165x50 mm and ° 165x80 mm distance pieces.

Loading Cylinder Assembly & Limit Switch :

• The Load Frame has a single acting up stroking ram. The diameter of piston changes with regard to the capacity.
• The maximum ram stroke is 50 mm, a limit switch is fitted to prevent over travel of the ram which cuts the power to the pump for safety.
• At the end of the test process to start a new test the piston returns to default position.
• There is a low friction coaxial PTFE seal between the cylinder and the piston fitted to the cylinder.

Hydraulic Power Pack :

• Automatic Hydraulic Power Pack, dual stage, controlled by digital readout unit is designed to supply the required oil to the load frames for loading.
• Controller unit has a simple and compact configuration.
• Very silent power pack can load the specimen between 1 kN/sec. to 20 kN/sec, with an accuracy of °5%. A Rapid approach pump is supplied as standard. Safety valve (maximum pressure valve) is used to avoid machine overloading.
• Maximum working pressure of the system is 400 bar.

Dual Stage Pump :

The dual stage pump is formed by two groups;

• Low pressure gear pump
• High pressure radial piston pump
• On the dual stage pump, a high delivery, low pressure gear pump is used for rapid approach, while a low delivery, high pressure radial piston pump is used for test execution. The rapid approach facility shortens the time interval from piston start until the upper platen touches to the specimen. This excellent feature helps to save a lot of time when a large number of specimens are going to be tested.

Motor :

• The motor which drives the dual pumps in an AC motor and it is controlled by motor inverter. The variation in the oil flow is executed with the variation of the rotation speed of the motor.

Distribution Block :

• A distribution block is used to control the oil flow direction supplied by the dual stage pump, the following parts are fitted to the distribution block; Solenoid valve, Safety valve (max. pressure valve), High Precision Pressure Transducer, Low pressure gear pump and High pressure radial piston pump.

High Precision Pressure Transducer :

This unique performance enables the machines to be used for a considerable number of applications including:

• Early age(2 or 3 days) compression strength tests
• Flexural and splitting tests by using proper accessories
• Mortar (Cement) compression tests by using proper accessories
• Core Testing

Load Cell :

• 600 kN Load Cell can be used for load measurements instead of High Precision Pressure Transducer.
• These property allows high accuracy at very low sample failures. (Class 1 at 6 kN to 600 kN)
• The user can choose Load Cell or Transducer in the order stage.

Oil Tank :

• The tank includes enough oil to fill the mechanism which pushes the ram during the test. The level and oil temperature can be seen on the indicator fitted to the tank. It has 25 L capacity.Hydraulic motor oil, number 46, must be used.

Digital Data Acquisition & Control System :

• The unit is designed to control the machine and processing of data from load-cells and pressure transducers which are fitted to the machine.
• All the operations of the unit is controlled from the front panel consisting of a LCD display and function keys.
• The unit has easy to use menu options.
• Digital graphic display unit loading rate of the time of Testing and load values can be monitored.
• Digital graphic display is able to draw real-time "Load vs. Time".

Software

• Sample, company, laboratory and test values can be entered in the programme.
• Load-time graphic, test reports and sample reports can be taken.
• Software provides test data, results, and the load-time graphs can be seen at LCD screen.
• The Automatic Core-Rock Compression machine can be controlled (Start, Stop commands) by a computer with the software free of charge. This software provides data acquisition and management for compression, tensile and splitting tensile test throughout the test execution. The advanced functions for data base management provide an easy navigation of all saved data. The test results certificate includes all descriptive information. Therefore, test parameters can be set and details about the test carried out such as client details, test type, specimen type, user info and other information required can be entered and printed out as well as test report and graph.

Main Features :

• Pace rate control from 1 kN/sec to 20 kN/sec depending on piston size.
• Can control 2 frames (optional)
• Can make test with load control.
• Real time display of test graph.
• Analog channels for different frame load cells
• RS-232 serial port connecting for computer interface
• LCD display
• 2 different unit system selection; kN and kgf
• Multi-language support (English and Turkish)
• 2 different unit system selection; SI and Metric
• Real-time clock and date
• Free of charge PC software for the test control and printout the test report.

Safety Features :

• Maximum pressure valves to avoid machine overloading
• Piston travel limit switch
• Emergency stop button
• Software controlled maximum load value
• Front and rear transparent durable Plexiglas guards