Laserfiche WebLink
CITY OF EVERETT SPECIAL PROVISIONS <br /> <br />3rd Ave Water Quality Facility Division 5 – SURFACE TREATMENTS September 12, 2024 <br />AND PAVEMENTS <br />WO No. – UP 3775 SP - 155 <br />Size recycled asphalt pavement (RAP) utilized in the production of HMA prior to <br />entering the mixer to produce a uniform and thoroughly mixed HMA. If there is <br />evidence of the recycled asphalt pavement not breaking down during the heating <br />and mixing of the HMA, immediately suspend the use of the RAP until Engineer <br />approves changes necessary to provide adequate RAP breakdown and mixing. <br />After introducing the required amount of mineral materials, RAP, new asphalt <br />binder and asphalt rejuvenator into the mixer, mix the HMA until complete and <br />uniform coating of the particles and thorough distribution of the asphalt binder <br />throughout the mineral materials, and RAP is ensured. <br />5-04.3(7) Spreading and Finishing <br />Lay the mixture upon an approved surface, spread, and strike off to the <br />established grade and elevation. Provide HMA pavers complying with Section 5- <br />04.3(3) to distribute the mixture. Unless Engineer directs otherwise, provide the <br />nominal compacted layer depth to NOT exceed the following: <br /> <br />HMA Class Course Maximum <br />Compacted Layer <br />Depth (FT) <br />1 inch NA 0.35 <br />3/4 & 1/2 inch Wearing 0.30 <br />3/4 & 1/2 inch Other 0.35 <br />3/8 inch NA 0.15 <br />On areas where irregularities or unavoidable obstacles make the use of <br />mechanical spreading and finishing equipment impractical, the paving may be <br />done with other equipment or by hand. <br />When more than one JMF is being utilized to produce HMA, place the material <br />produced for each JMF using separate spreading and compacting equipment. Do <br />NOT intermingle HMA produced from more than one JMF. During a work shift <br />place each strip of HMA to a single JMF established for the class of HMA <br />specified, unless there is a need to make an adjustment in the JMF. <br />5-04.3(8) Aggregate Acceptance Prior to Incorporation in HMA <br />For HMA accepted by nonstatistical evaluation the aggregate properties of sand <br />equivalent, uncompacted void content and fracture will be evaluated in <br />accordance with Section 3-04. Sampling and testing of aggregates for HMA <br />accepted by commercial evaluation will be at the Engineer’s option. <br />5-04.3(9) HMA Mixture Acceptance <br />Engineer will use nonstatistical, or commercial evaluation for determining <br />acceptance of HMA. <br />Engineer will use nonstatistical evaluation for the HMA acceptance, unless <br />Contract specifies Commercial Evaluation. <br />Engineer will use Commercial evaluation for Commercial HMA and for other <br />classes of HMA in the following applications: sidewalks, road approaches, paths, <br />trails, temporary pavement, and pavement repair. Engineer will need to approve <br />other nonstructural applications of HMA accepted by commercial evaluation. <br />Sampling and testing of HMA accepted by commercial evaluation will be at the <br />Engineer’s option.