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18TH STREET PEDESTRIAN IMPROVEMENTS 3741 RMT July 03, 2024 54 train, required to attain the maximum test point density, shall be used on all subsequent 1 paving. 2 3 HMA for preleveling shall be thoroughly compacted. HMA that is used for preleveling 4 wheel rutting shall be compacted with a pneumatic tire roller unless otherwise approved 5 by the Engineer. 6 7 Test Results 8 For a sublot that has been tested with a nuclear density gauge that did not meet the 9 minimum of 91 percent of the reference maximum density in a compaction lot with a CPF 10 below 1.00 and thus subject to a price reduction or rejection, the Contractor may request 11 that a core be used for determination of the relative density of the sublot. The relative 12 density of the core will replace the relative density determined by the nuclear density 13 gauge for the sublot and will be used for calculation of the CPF and acceptance of HMA 14 compaction lot. 15 16 When cores are taken by the Contracting Agency at the request of the Contractor, they 17 shall be requested by noon of the next workday after the test results for the sublot have 18 been provided or made available to the Contractor. Core locations shall be outside of 19 wheel paths and as determined by the Engineer. Traffic control shall be provided by the 20 Contractor as requested by the Engineer. Failure by the Contractor to provide the 21 requested traffic control will result in forfeiture of the request for cores. When the CPF for 22 the lot based on the results of the HMA cores is less than 1.00, the cost for the coring will 23 be deducted from any monies due or that may become due the Contractor under the 24 Contract at the rate of $200 per core and the Contractor shall pay for the cost of the 25 traffic control. 26 27 5-04.3(10)A HMA Compaction – General Compaction Requirements 28 Compaction shall take place when the mixture is in the proper condition so that no undue 29 displacement, cracking, or shoving occurs. Areas inaccessible to large compaction 30 equipment shall be compacted by other mechanical means. Any HMA that becomes 31 loose, broken, contaminated, shows an excess or deficiency of asphalt, or is in any way 32 defective, shall be removed and replaced with new hot mix that shall be immediately 33 compacted to conform to the surrounding area. 34 35 The type of rollers to be used and their relative position in the compaction sequence 36 shall generally be the Contractor’s option, provided the specified densities are attained. 37 Unless the Engineer has approved otherwise, rollers shall only be operated in the static 38 mode when the internal temperature of the mix is less than 175°F. Regardless of mix 39 temperature, a roller shall not be operated in a mode that results in checking or cracking 40 of the mat. Rollers shall only be operated in static mode on bridge decks. 41 42 5-04.3(10)B HMA Compaction – Cyclic Density 43 Low cyclic density areas are defined as spots or streaks in the pavement that are less 44 than 90 percent of the theoretical maximum density. At the Engineer’s discretion, the 45 Engineer may evaluate the HMA pavement for low cyclic density, and when doing so will 46 follow WSDOT SOP 733. A $500 Cyclic Density Price Adjustment will be assessed for 47 any 500-foot section with two or more density readings below 90 percent of the 48 theoretical maximum density. 49