Trinity Contractors, Inc 3/1/2017

1 1 2 5-04.3(5)A Stockpiling RAP or RAS for High RAP/Any RAS Mixes I3 Do not place any RAP or RAS into a stockpile which has been 4 sequestered for a High RAP/Any RAS mix design. Do not incorporate any 5 RAP or RAS into a High RAP/Any RAS mixture from any source other I 6 than the stockpile which was sequestered for approval of that particular 7 High RAP/Any RAS mix design. 8 I 9 RAP that is used in a Low RAP/No RAS mix is not required to come from 10 a sequestered stockpile. 11 I 12 5-04.3(6) Mixing 13 The asphalt supplier shall introduce anti-stripping additive, in the amount 14 designated on the QPL for the mix design, into the asphalt binder prior to I 15 shipment to the asphalt mixing plant. 16 17 Anti-strip is not required for temporary work that will be removed prior to 18 Physical Completion. I19 20 Use asphalt binder of the grade, and from the supplier, in the approved mix 21 design. 1 22 23 Prior to introducing reclaimed materials into the asphalt plant, remove wire, 24 nails, and other foreign material. Discontinue use of the reclaimed material if I 25 the Engineer, in their sole discretion, determines the wire, nails, or other 26 foreign material to be excessive. 27 28 Size RAP and RAS prior to entering the mixer to provide uniform and 29 thoroughly mixed HMA. If there is evidence of the RAP or RAS not breaking 30 down during the heating and mixing of the HMA, immediately suspend the use I 31 of the RAP or RAS until changes have been approved by the Engineer. 32 33 After the required amount of mineral materials, RAP, RAS, new asphalt binder 34 and recycling agent have been introduced into the mixer, mix the HMA until I35 complete and uniform coating of the particles and thorough distribution of the 36 asphalt binder throughout the mineral materials, RAP and RAS is ensured. 37 I 38 Upon discharge from the mixer, ensure that the temperature of the HMA does 39 not exceed the optimum mixing temperature shown on the approved Mix 40 Design Report by more than 25°F, or as approved by the Engineer. When a I 41 WMA additive is included in the manufacture of HMA, do not heat the WMA 42 additive (at any stage of production including in binder storage tanks) to a 43 temperature higher than the maximum recommended by the manufacturer of I 44 the WMA additive. 45 46 A maximum water content of 2 percent in the mix, at discharge, will be allowed 111 47 providing the water causes no problems with handling, stripping, or flushing. If 48 the water in the HMA causes any of these problems, reduce the moisture 49 content. 50 1 51 During the daily operation, HMA may be temporarily held in approved storage 52 facilities. Do not incorporate HMA into the Work that has been held for more I I AMENDMENTS TO THE 2016 STANDARD SPECIFICATIONS BOOK Revised: 8/1/16