THE ONLY ELECTROMECHANICAL SHEAR BOX COMPACTOR
STANDARD: ASTM D7981-15 Standard practice for compaction of prismatic asphalt specimens by means of the Shear Box Compactor.
The ASC is being used in FHWA Contract “Deployment of Performance-Based Technologies for Mechanistic-Empirical Pavement Design and
Resource Responsible Materials Design” to fabricate specimens for Level 1 analyses using the AASHTOWare Pavement ME Design software.
It is the only compactor capable of fabricating specimens for all of the following mechanistic-empirical performance tests:
Dynamic Modulus, AASHTO PP 61
Repeated Load Permanent Deformation, AASHTO TP 79
Flexural Fatigue, AASHTO T321
Low Temperature Creep and Strength, AASHTO T322
Extremely sturdy fabricated frame combined with precision machined components.
Servo hydraulic vertical ram with integral hydraulic power supply.
Precision electro-mechanical shearing motion
Integral specimen extruder.
Electronic control unit with touch screen color display (no need for PC).
Unlimited memory storage with: 2 USB ports, 1 SD card slot , RS232/485 serial port.
The compaction cycle can be programmed by specifying vertical stress/load and test termination conditions; Number of
cycles, Specimen height and/or density.
Precision load cell(s) for vertical and shear stress measurement.
Optional built-in mould heater.
Vertical force Up to 100kN
Shearing force Up to 50kN
Shear angle 4° ± 0.1°
Shearing cycle rate 3 ± 0.1 cycles per minute
Mould width 150mm ± 0.1 mm
Mould length 450mm ± 0.1 mm
Mould surface finish (inside) Smoother than 0.4μm rms
Mould surface hardness More than 48 Rockwell C
Mould capacity Approx. 20 litres
Loading platen width 149 mm ± 0.2 mm
Loading platen length 449 mm ± 0.2 mm
Loading platen smoothness Smoother than 0.4μm rms
Loading platen surface hardness More than 48 Rockwell C
Number of cycles Up to 100
Vertical stress 0.1 to 1.5MPa ± 0.01MPa
Compaction height 0 mm to 200 mm ± 0.1mm
Power supply: 230V 1ph 50-60Hz
Dimensions: 788x1360x1314 mm
Weight: 1200 kg approx.
A RUGGED DESIGN FOR THE BEST SPECIMEN PREPARATION
Asphalt technologists are acutely aware of the importance of a representative
specimen during any laboratory performance testing.
The precise shearing motion of the ASC replicates the conditions of
field compaction in order to reproduce the field properties of asphalt,
quickly and easily under the controlled conditions of a laboratory.
The ASC compacts large asphalt prisms that can be sawn to produce
four to six beams or slabs for laboratory wheel tracking; or the prism
can be cored to produce three to four 100 mm diameter cylinders, all
having essentially identical properties.
The electronic control unit, with touch screen color display, makes a
PC an option, not a necessity.
The user friendly touch-screen icon interface allows for easy set up
parameter entry, enables immediate (fully automatic test execution)
data acquisition/processing, test report, and data file generation.
A LAN connection to Intranet/Internet enables remote communication
to receive immediate diagnostic analysis and technical support from
Matest technicians, and/or software updates
B039A-01 LOADING CHUTE
B039A-02 TRAY (2 off)
B039A-03 SPREADING COMB
B039A-04 LEVELING BLADE
B039A-05 BUILT-IN MOULD HEATER (optional)