Tandem Roller. Monday , June 04th , 2018 - 15:03:59 PM
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.
At this ratio it means the drive gear must make 1.62 revolutions to turn the driven gear once. It also means that for every one revolution of the driver the driven gear has made 1/1.62 or 0.62 revolutions. Essentially the larger gear turns slower.
Rollers are also used in landfill compaction. Such compactors typically have padfoot or "sheep s-foot" drums and do not achieve a smooth surface. The pads aid in compression due to the smaller area contacting the ground.
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