Trinity Contractors, Inc 3/1/2017

1 1 2 1. Shall be positively connected to the paver. 3 I 4 2. May accept HMA directly from the haul vehicle or pick up HMA from a 5 windrow. 6 7 3. Shall mix the HMA after delivery by the hauling equipment and prior 8 to placement into the paving machine. 9 10 4. Shall mix the HMA sufficiently to obtain a uniform temperature 11 throughout the mixture. 12 13 5-04.3(3)E Rollers 14 Operate rollers in accordance with the manufacturer's recommendations. 15 When requested by the Engineer, provide a Type 1 Working Drawing of the 16 manufacturer's recommendation for the use of any roller planned for use on 17 the project. Do not use rollers that crush aggregate, produce pickup or 18 washboard, unevenly compact the surface, displace the mix, or produce other 19 undesirable results. 20 21 5-04.3(4) Preparation of Existing Paved Surfaces 22 Before constructing HMA on an existing paved surface, the entire surface of the 23 pavement shall be clean. Entirely remove all fatty asphalt patches, grease 24 drippings, and other deleterious substances from the existing pavement to the 25 satisfaction of the Engineer. Thoroughly clean all pavements or bituminous 26 surfaces of dust, soil, pavement grindings, and other foreign matter. Thoroughly 27 remove any cleaning or solvent type liquids used to clean equipment spilled on the 28 pavement before paving proceeds. Fill all holes and small depressions with an I 29 appropriate class of HMA. Level and thoroughly compact the surface of the patched 30 area. 31 32 Apply a uniform coat of asphalt (tack coat) to all paved surfaces on which any 33 course of HMA is to be placed or abutted. Apply tack coat to cover the cleaned 34 existing pavement with a thin film of residual asphalt free of streaks and bare spots. 35 Apply a heavy application of tack coat to all joints. For Roadways open to traffic, 36 limit the application of tack coat to surfaces that will be paved during the same 37 working shift. Equip the spreading equipment with a thermometer to indicate the 38 temperature of the tack coat material. 39 40 Do not operate equipment on tacked surfaces until the tack has broken and cured. 41 Repair tack coat damaged by the Contractor's operation, prior to placement of the 42 HMA. 43 44 Unless otherwise approved by the Engineer, use CSS-1, CSS-1 h,STE-1, or I 45 Performance Graded (PG) asphalt for tack coat. The CSS-1 and CSS-1 h emulsified 46 asphalt may be diluted with water at a rate not to exceed one part water to one part 47 emulsified asphalt. Do not allow the tack coat material to exceed the maximum 48 temperature recommended by the asphalt supplier. 49 50 When shown in the Plans, prelevel uneven or broken surfaces over which HMA is 51 to be placed by using an asphalt paver, a motor patrol grader, or by hand raking, as 1 52 approved by the Engineer. 1 AMENDMENTS TO THE 2016 STANDARD SPECIFICATIONS BOOK Revised: 8/1/15