Intermediate Rolling Sample Clauses

Intermediate Rolling. The rubber tired roller shall be close behind the break down roller after the mat has cooled a few degrees. The rubber tired roller shall roll the same pattern making the same coverage as the breakdown. The rubber tired roller should stay the thickness of the lift from the free edge. The number of coverages shall be determined by the contractor. This will change with temperature, humidity and thickness of the lift. S-1.12.2.2 Longitudinal Joint Break Down Rolling of Paving Lanes Succeeding Initial Lanes The break down roller in the vibratory mode shall lap over the tucked joint approximately six inches (6”) on to the previously placed compacted lane. As part of the break-down rolling and immediately after the break-down roller completes its first passes, the longitudinal joint shall be pinched to ensure compaction with the pneumatic-tired roller. The rubber tired roller shall make at least one complete pass (forward and backward) operated on the hot lane with the outside tire pinching the joint. After the rubber tired roller rolls the joint, it shall make at least one pass over the rest of the mat and then drop back to its intermediate rolling. The steel drum roller in static mode shall immediately smooth out the rubber tired marks. Finish rolling should start when the mat has cooled down 20F to 40F below the intermediate rolling (This could be approximately 225F). The steel wheeled roller in static mode shall immediately smooth out the rubber tired marks using the same pattern making the same type coverages as the breakdown roller. Do not roll until cracks appear, let it cool. Finish rolling can continue until the temperature reaches 175F to 150F. The finish rolling shall continue until the pavement is smooth and has the density specified above. S-1.13 Sampling Pavements for Density Samples of finished pavement shall be obtained by the contractor or the contractor’s laboratory. A minimum of one test (three cores) shall be taken for each tonnage lot represented by a Superpave Asphaltic Concrete test. Lots larger than 1200 tons shall have one set of (three cores) for each 1000 tons placed or as directed by the Engineer. The cores samples shall be taken at locations throughout the tonnage lot. The locations shall not be previously marked. The core locations shall be marked by the City Engineer after each tonnage lot placement is completed. Cores shall be at least 4 inches in diameter. Sample holes shall be backfilled by the contractor using Quikrete, Ra...
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Intermediate Rolling. The rubber tired roller shall be close behind the break down roller after the mat has cooled a few degrees. The rubber tired roller shall roll the same pattern making the same coverage as the breakdown. The rubber tired roller should stay the thickness of the lift from the free edge. The number of coverages shall be determined by the contractor. This will change with temperature, humidity and thickness of the lift.
Sample 1

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