Slab compactors used for compact asphalt slabs to a target density applying specific loads corresponding to those of pavements rollers used in the highway construction.
Electromechanical slab compactors feature a compacting system by roller segment head radius 535 mm.
The slab can be used for:
• Wheel tracking test down to 38 mm thickness
• Cored to provide specimens for indirect tensile, static and dynamic creep tests
• Cut into beams for bending fatigue tests
How it works Slab Compactor;
• The roller segment freely moves by simple friction for better compaction uniformity. A servo motor moves vertically the roller segment under displacement control.
• The vertical load is applied orthogonally to the axis of the travel motion while the mold carriage moves back and forth by linear movement.
• The longitudinal mold dimension correspond to the compaction direction so it is possible to obtain specimens of proper length conforming to Standards.
• The lifting machine cover permit an easy access to the mould area. In the “rest” position, the mold is close to the operator for easy positioning while the roller segment is lifted and positioned at the back of the machine.
| Max. Vertical Force | 30 kN |
|---|---|
| Load measurement | By two precision load cell |
| Compacting Device | Roller segment, radius 535 mm |
| Machine control | Vertical load and/or displacement control of the roller segment by servo motor, measured directly by linear transducer to verify in real time the specimen thickness for more accuracy |
| Real time measurement and control with a closed loop logic of compaction load by two precision strain gauge load cells. This system permits to verify possible discrepancies of the compaction due to the wrong distribution of asphalt in the mould and to any other unexpected malfunctions, with warning to the operator | |
| Machine fitted with sensors to confirm the mould in position and for the automatic set-up of the horizontal travel | |
| Back and forth horizontal travel | 300/320 mm |
| 400 mm | |
| 500 mm | |
| By control panel | |
| Trolley Speed | Adjustable up to 300 mm/s |
| Mould Dimensions | 320 x 260 x 195 mm |
| 300 x 300 x 195 mm | |
| 400 x 300 x 195 mm | |
| 500 x 300 x 195 mm | |
| 500 x 400 x 195 mm | |
| Roller Vibration | Yes, adjustable frequency from 10 to 50 Hz (optional) |
| Heated Foot | Yes |
| Heated Base | Yes |
| Software | 7” Touch screen control and data acquisition unit |
| PC software operating in Windows® | |
| Set up of customized compaction sequence as free combination of load/displacement controlled cycles | |
| Selection, customization and storing of test parameters | |
| Customization of the compacting sequence to be saved and recalled from the database | |
| Graphic display of displacement / force vs. number of passes or load vs. displacement | |
| Power Rating | 3000 W |
| Power supply | 380-400 V, 50 Hz or 60 Hz Three-phase |
| Dimensions | 1350 x 820 x 2050mm |
| Weight (approx.) | 670 kg |