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The New Humboldt H-3212 Three Wheel Polishing Device is designed to simulate the polishing effects of traffic. Polishing of unbound aggregates per AASHTO PP103 and asphalt mixtures per AASHTO PP104 can be accomplished prior to dynamic friction testing. A staging area facilitates the installation and removal of the molds in the testing area. Electronic actuators lift and lower the wheel carriage onto and off the sample. The VFD allows for a variable rotation of 50-70 rpm from the rugged 1/2hp gear motor. A counter mounted on the electronic controller counts down, stopping the test automatically when the 100,000 rotations are completed.
| Voltage: 115/130VAC 60Hz |
| 1/2hp, three-phase gear motor |
| Variable Frequency Drive (VFD) controlled |
| 115V, 60Hz Submersible water pump |
| RPM range: 50-70 |
Frame
| Rugged 80/20 aluminum slotted frame |
| Clear plexiglass on all 4 sides |
| Front access door with safety cut off switch |
| Locking door hinges prevent door from closing when open |
| Sample/mold adjustment and locking knobs, locks the mold in place preventing it from moving during testing. |
| Electronic actuators lift and lower the wheel base |
Wheelbase
| 145 ±5 lbs, including steel weights and carriage assembly |
| Three 2.8/2.40-40 tires on heavy-duty swivel casters |
| 11.2″ diameter wheel path |
| Connects to electronic actuator for easy lifting and lowering |
Staging Area
| The 24″ x 22″ sample staging allows the user to easily slide the sample in and out of the testing area |
| Stainless steel metal platform |
Water Basin
| 5′ L x 3.5′ W x 6″D with drain valve |
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AASHTO PP103
AASHTO PP104
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