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IV 77 tl � 41 IV VV V VVI 'If I Ir I SJ 330-9 . 2 .4 Correcting Defects : Before starting any rolling, check the surface , correct any irregularities ; remove all drippings , fat sandy accumulations from the screed, and fat spots from any source ; and replace them with satisfactory material . Do not skin patch . When correcting a depression while the mixture is hot, scarify the surface and add fresh mixture . 330-9.3 Requirements Applicable Only to Leveling Courses : 330-9.3 . 1 Patching Depressions : Before spreading any leveling course, fill all depressions in the existing surface more than 1 inch deep by spot patching with leveling course mixture, and then compact them thoroughly. 330-9.3 .2 Spreading Leveling Courses : Place all courses of leveling by the use of two motor graders , equip one with a spreader box . Use other types of leveling devices after they have been approved by the Engineer. 330-9 .3 .3 Rate of Application : When using Type SM . 5 (fine graded) for leveling, do not allow the average spread of a layer to be less than 50 lb/yd2 or more than 75 lb/yd 2 . The quantity of mix for leveling shown in the plans represents the average for the entire project; however, the Contractor may vary the rate of application throughout the project as directed by the Engineer. When leveling in connection with base widening, the Engineer may require placing all the leveling mix prior to the widening operation . 330-9 .3 .4 Placing Leveling Course Over Existing Pavement : When the Contract Documents specify a leveling course to be placed over cracked concrete pavement, I ncluding existing concrete pavement covered with an asphalt surface , place the first layer of leveling course as soon as possible but no later than 48 hours after cracking the concrete. 330-9 .3 .5 Removal of Excess Joint Material : Where placing a leveling course over existing concrete pavement or bridge decks , trim the excess joint filler in the cracks and joints flush with the surface prior to placing the first layer of the leveling course . 33040 Compacting Mixture. 33040. 1 Provisions Applicable to All Types : 33040 . 1 . 1 Equipment and Sequence : For each paving operation, furnish a separate set of rollers , with their operators . When density testing for acceptance is required, select equipment, sequence, and coverage of rolling to meet the specified density requirement. The coverage is the number of times the roller passes over a given area of pavement. Regardless of the rolling procedure used, complete the final rolling before the surface temperature of the pavement drops to the extent that effective compaction may not be achieved or the rollers begin to damage the pavement. When density testing for acceptance is not required, propose an alternative rolling pattern to be approved b the Engineer or use the following standard rollingprocedure : 1 . Seal (breakdown) Rolling : Provide two static coverages with a tandem steel-wheeled roller, weighing 5 to 15 tons, following as close behind the paver as possible without pick-up , undue displacement, or blistering of the material . 2 . Intermediate rolling : Provide five static coverages with a pneumatic-tired roller, following as close behind the seal (breakdown) rolling operation as the ix mwill permit . 3 . Final rolling : Provide one static coverage with a tandem steel - wheeled roller, weighing 5 to 15 tons , after completing the seal (breakdown) rolling and intermediate rolling, but before the surface pavement temperature drops to the extent that effective compaction may not be achieved or the rollers begin to damage the pavement. - 74 - FPID ( S ) : 423186 - 1 - 58 - 01