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CITY OF EVERETT WEST MARINE VIEW DRIVE/ALVERSON AND 41 ST ST/GRAND AVE <br />PEDESTRIAN IMPROVEMENTS <br />STATE FUND# HLP-PB15(032) <br />WO #3630 July 25, 2024 <br />63 <br />1 5-04.3(4) Preparation of Existing Paved Surfaces <br />2 When the surface of the existing pavement or old base is irregular, the Contractor shall <br />3 bring it to a uniform grade and cross section as shown on the Plans or approved by the <br />4 Engineer. <br />5 <br />6 Preleveling of uneven or broken surfaces over which HMA is to be placed may be <br />7 accomplished by using an asphalt paver, a motor patrol grader, or by hand raking, as <br />8 approved by the Engineer. <br />9 <br />10 Compaction of preleveling HMA shall be to the satisfaction of the Engineer and may <br />11 require the use of small steel wheel rollers, plate compactors, or pneumatic rollers to <br />12 avoid bridging across preleveled areas by the compaction equipment. Equipment used for <br />13 the compaction of preleveling HMA shall be approved by the Engineer. <br />14 <br />15 Before construction of HMA on an existing paved surface, the entire surface of the <br />16 pavement shall be clean. All fatty asphalt patches, grease drippings, and other <br />17 objectionable matter shall be entirely removed from the existing pavement. All pavements <br />18 or bituminous surfaces shall be thoroughly cleaned of dust, soil, pavement grindings, and <br />19 other foreign matter. All holes and small depressions shall be filled with an appropriate <br />20 class of HMA. The surface of the patched area shall be leveled and compacted <br />21 thoroughly. Prior to the application of tack coat, or paving, the condition of the surface <br />22 shall be approved by the Engineer. <br />23 <br />24 A tack coat of asphalt shall be applied to all paved surfaces on which any course of HMA <br />25 is to be placed or abutted; except that tack coat may be omitted from clean, newly paved <br />26 surfaces at the discretion of the Engineer. Tack coat shall be uniformly applied to cover <br />27 the existing pavement with a thin film of residual asphalt free of streaks and bare spots at <br />28 a rate between 0.02 and 0.10 gallons per square yard of retained asphalt. The rate of <br />29 application shall be approved by the Engineer. A heavy application of tack coat shall be <br />30 applied to all joints. For Roadways open to traffic, the application of tack coat shall be <br />31 limited to surfaces that will be paved during the same working shift. The spreading <br />32 equipment shall be equipped with a thermometer to indicate the temperature of the tack <br />33 coat material. <br />34 <br />35 Equipment shall not operate on tacked surfaces until the tack has broken and cured. If the <br />36 Contractors operation damages the tack coat it shall be repaired prior to placement of the <br />37 HMA. <br />38 <br />39 The tack coat shall be CSS-1, or CSS-1h emulsified asphalt. The CSS-1 and CSS-1h <br />40 emulsified asphalt may be diluted once with water at a rate not to exceed one part water <br />41 to one part emulsified asphalt. The tack coat shall have sufficient temperature such that it <br />42 may be applied uniformly at the specified rate of application and shall not exceed the <br />43 maximum temperature recommended by the emulsified 956.9&+X;93%,98+%*/*) <br />44 <br />45 5-04.3(4)A Crack Sealing <br />46 <br />47 5-04.3(4)A1 General