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2025 FEDERAL OVERLAY, BROADWAY – CALIFORNIA ST TO 18TH ST SPECIAL PROVISIONS <br />FEDERAL AID# STBGUL-2715(012); COE PW# 3841 SP-84 May 6, 2025 <br /> <br />The type of rollers to be used and their relative position in the compaction sequence 1 <br />shall generally be the Contractor’s option, provided the specified densities are attained. 2 <br />Unless the Engineer has approved otherwise, rollers shall only be operated in the static 3 <br />mode when the internal temperature of the mix is less than 175°F. Regardless of mix 4 <br />temperature, a roller shall not be operated in a mode that results in checking or cracking 5 <br />of the mat. Rollers shall only be operated in static mode on bridge decks. 6 <br /> 7 <br />5-04.3(10)B HMA Compaction - Cyclic Density 8 <br />Low cyclic density areas are defined as spots or streaks in the pavement that are less 9 <br />than 90 percent of the theoretical maximum density. At the Engineer’s discretion, the 10 <br />Engineer may evaluate the HMA pavement for low cyclic density, and when doing so will 11 <br />follow WSDOT SOP 733. A $500 Cyclic Density Price Adjustment will be assessed for 12 <br />any 500-foot section with two or more density readings below 90 percent of the 13 <br />theoretical maximum density. 14 <br /> 15 <br />5-04.3(10)C Vacant 16 <br /> 17 <br />5-04.3(10)D HMA Nonstatistical Compaction 18 <br /> 19 <br />5-04.3(10)D1 HMA Nonstatistical Compaction - Lots and Sublots 20 <br />HMA compaction which is accepted by nonstatistical evaluation will be based on 21 <br />acceptance testing performed by the Contracting Agency dividing the project into 22 <br />compaction lots. 23 <br /> 24 <br />A lot is represented by randomly selected samples of the same mix design that will be 25 <br />tested for acceptance. A lot is defined as the total quantity of material or work produced 26 <br />for each Job Mix Formula placed. Only one lot per JMF is expected. A sublot shall be 27 <br />equal to one day’s production or 400 tons, whichever is less except that the final sublot 28 <br />will be a minimum of 200 tons and may be increased to 800 tons. Testing for compaction 29 <br />will be at the rate of 5 tests per sublot per WSDOT T 738. 30 <br /> 31 <br />The sublot locations within each density lot will be determined by the Engineer. For a lot 32 <br />in progress with a CPF less than 0.75, a new lot will begin at the Contractor’s request 33 <br />after the Engineer is satisfied that material conforming to the Specifications can be 34 <br />produced. 35 <br /> 36 <br />HMA mixture accepted by commercial evaluation and HMA constructed under conditions 37 <br />other than those listed above shall be compacted on the basis of a test point evaluation 38 <br />of the compaction train. The test point evaluation shall be performed in accordance with 39 <br />instructions from the Engineer. The number of passes with an approved compaction 40 <br />train, required to attain the maximum test point density, shall be used on all subsequent 41 <br />paving. 42 <br /> 43 <br />HMA for preleveling shall be thoroughly compacted. HMA that is used to prelevel wheel 44 <br />ruts shall be compacted with a pneumatic tire roller unless otherwise approved by the 45 <br />Engineer. 46 <br /> 47