Lakeside Industries Inc. 6/21/2021

I Ii crushing of the aggregate will not be permitted. Rollers producing pickup, washboard, 2 uneven compaction of the surface, displacement of the mixture or other undesirable 3 results shall not be used. 1 4 5 5-04.3(4) Preparation of Existing Paved Surfaces 6 When the surface of the existing pavement or old base is irregular, the Contractor shall I 7 bring it to a uniform grade and cross section as shown on the Plans or approved by the 8 Engineer. 9 10 Preleveling of uneven or broken surfaces over which HMA is to be placed may be 11 accomplished by using an asphalt paver, a motor patrol grader, or by hand raking, as 12 approved by the Engineer. I 13 14 Compaction of preleveling HMA shall be to the satisfaction of the Engineer and may 15 require the use of small steel wheel rollers, plate compactors, or pneumatic rollers to I 16 avoid bridging across preleveled areas by the compaction equipment. Equipment used 17 for the compaction of preleveling HMA shall be approved by the Engineer. 18 I 19 Before construction of HMA on an existing paved surface, the entire surface of the 20 pavement shall be clean. All fatty asphalt patches, grease drippings, and other 21 objectionable matter shall be entirely removed from the existing pavement. All I 22 pavements or bituminous surfaces shall be thoroughly cleaned of dust, soil, pavement 23 grindings, and other foreign matter. All holes and small depressions shall be filled with an 24 appropriate class of HMA. The surface of the patched area shall be leveled and I 25 26 compacted thoroughly. Prior to the application of tack coat, or paving, the condition of the surface shall be approved by the Engineer. 27 I 28 A tack coat of asphalt shall be applied to all paved surfaces on which any course of HMA 29 is to be placed or abutted; except that tack coat may be omitted from clean, newly paved 30 surfaces at the discretion of the Engineer. Tack coat shall be uniformly applied to cover I 31 32 the existing pavement with a thin film of residual asphalt free of streaks and bare spots at a rate between 0.02 and 0.10 gallons per square yard of retained asphalt. The rate of 33 application shall be approved by the Engineer. A heavy application of tack coat shall be I 34 applied to all joints. For Roadways open to traffic, the application of tack coat shall be 35 limited to surfaces that will be paved during the same working shift. The spreading 36 equipment shall be equipped with a thermometer to indicate the temperature of the tack I 37 coat material. 38 39 Equipment shall not operate on tacked surfaces until the tack has broken and cured. If I 40 41 the Contractor's operation damages the tack coat it shall be repaired prior to placement of the HMA. 42 I 43 The tack coat shall be CSS-1, or CSS-1 h emulsified asphalt. The CSS-1 and CSS-1 h 44 emulsified asphalt may be diluted once with water at a rate not to exceed one part water 45 to one part emulsified asphalt. The tack coat shall have sufficient temperature such that I 46 it may be applied uniformly at the specified rate of application and shall not exceed the 47 maximum temperature recommended by the emulsified asphalt manufacturer. I 2021 PAVEMENT MAINTENANCE OVERLAY PAGE 53 OF 84 DIVISION T IWORK ORDER 3751 MARCH 29,2021