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How Many Rollers Are Required? |
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Answer» Contrary to popular belief, the number of rollers required for proper compaction is based on the SQUARE yardage placed rather than the production or delivery tonnage. Roller speed should be limited to 3 mph. With this speed and the width of the roller, the coverage rate can be calculated. The width of paver pass and speed can give you the square yardage placed. The number of required coverages will then tell you the total area in square yards the roller must be able to COVER. On very small jobs, one roller may be adequate. On very large projects, six or eight rollers may be needed. A lot of projects are impacted with three rollers: a breakdown roller, a compaction roller, and a finish roller. On most average projects, two rollers are USED – a VIBRATORY steel-wheel roller for breakdown and compaction, and a heavy static steel wheel for finish rolling. Occasionally, agency specifications will require a light (65 to 75 psi contact pressure) pneumatic roller to be used to knead or seal the surface prior to the finish rolling. Contrary to popular belief, the number of rollers required for proper compaction is based on the square yardage placed rather than the production or delivery tonnage. Roller speed should be limited to 3 mph. With this speed and the width of the roller, the coverage rate can be calculated. The width of paver pass and speed can give you the square yardage placed. The number of required coverages will then tell you the total area in square yards the roller must be able to cover. On very small jobs, one roller may be adequate. On very large projects, six or eight rollers may be needed. A lot of projects are impacted with three rollers: a breakdown roller, a compaction roller, and a finish roller. On most average projects, two rollers are used – a vibratory steel-wheel roller for breakdown and compaction, and a heavy static steel wheel for finish rolling. Occasionally, agency specifications will require a light (65 to 75 psi contact pressure) pneumatic roller to be used to knead or seal the surface prior to the finish rolling. |
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