Description
Road rollers use the weight of the vehicle to compress the surface being rolled (static) or use mechanical advantage (vibrating). Initial compaction of the substrate on a road project is done using a padfoot drum roller, which achieves higher compaction density due to the pads having less surface area. On large freeways, a four-wheel compactor with padfoot drum and a blade, such as a Caterpillar 815/825 series machine, would be used due to its high weight, speed, and the powerful pushing force to spread bulk material. On regional roads, a smaller single padfoot drum machine may be used.
In order to press asphalt, soil and other loose materials, drum rollers are used. This machine is typically found at road construction sites. There are two types of drum rollers: smooth rollers and padfoot rollers. Smooth rollers provide static pressure and use vibration to compact loose materials. Padfoot rollers, also known as Sheepsfoot rollers, also provide static pressure and vibration; however, they also generate manipulative force, allowing for uniform compaction.
- available in widths: 610 to 2,130 millimetres (24in - 84in)
- Pedestrian-operated
- Rammer
- Walk-behind plate compactor/light
- Walk-behind roller/light (single drum)
- Walk-behind roller/heavy (double drum)
- Trench roller
- Ride-on smooth finish
- Tandem drum (static)
- Tandem drum (vibrating)
- Single drum roller (smooth)
- Pneumatic-tyred Roller, called rubber tyre or multi-wheel
- Combination roller (single row of tyres and a steel drum)
- Three point roller (steam rollers are usually three-point)
- Ride-on soil/landfill compactor with pads/feet/spikes
- Single drum roller (soil)
- 4-wheel (soil/landfill)
- 3-point (soil/landfill)
- Tandem drum (soil/landfill)
Excavator
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