Ariston Pacific, Inc. 5/9/2016 - Laserfiche WebLink

I 1 Changes to the percentage of material from a stockpile will be calculated exclusive of 2 the RAP content for mix designs with 20 percent RAP or less by total weight of HMA. 3 4 Changes to asphalt binder that may require a new mix design include the source of the 5 crude petroleum supplied to the refinery, the refining process, and additives or modifiers 6 in the asphalt binder. I 7 8 The Contractor shall include the brand and type of anti-stripping additive in the mix 9 design submittal and provide certification from the asphalt binder manufacture that the I 10 anti-stripping additive is compatible with the crude source and formulation of asphalt 11 binder proposed in the mix design. All changes to anti-strip require the submittal of a 12 new mix design for approval. I 13 14 Mix designs with 20 percent RAP or less by total weight of HMA and no RAS will be 15 completed without the inclusion of the RAP. For HMA mix designs with greater than 20 16 percent RAP by total weight of HMA or any amount of RAS the Contractor shall develop 17 a mix design including RAP, RAS, recycling agent and new asphalt binder. Asphalt 18 binder contributed from RAS shall be determined in accordance with AASHTO PP 78. 19 The total quantity of asphalt binder from the RAP and RAS shall not exceed 40 percent 20 of the total asphalt binder content of the HMA. 21 22 Once the RAP and RAS stockpiles have been constructed the Contractor shall extract, 23 recover and test the asphalt residue from the RAP and RAS stockpiles to determine the 24 percent of recycling agent and/or grade of new asphalt binder needed to meet the grade 25 of asphalt binder required by the contract. The asphalt extraction testing shall be 26 performed in accordance with AASHTO T 164 or ASTM D 2172 using reagent grade 27 trichloroethylene. The asphalt recovery shall be performed in accordance with AASHTO 28 R 59 orASTM D 1856. The recovered asphalt residue shall be tested in accordance with I 29 AASHTO R 29 to determine the asphalt binder grade in accordance with Section 9- 30 02.1(4). Once the recovered asphalt binder grade is determined the percent of recycling 31 agent and/or grade of new asphalt binder shall be determined in accordance with ASTM 32 D 4887. The final blend of recycling agent, recovered and new asphalt shall be tested in 33 accordance with AASHTO R 29. The final blended asphalt binder shall be the grade as 34 required by the Contract and comply with the requirements of in accordance with 1 35 Section 9-02.1(4). 36 37 5-04.3(7)A2 Statistical or Nonstatistical Evaluation 38 This section is revised to read: 39 40 The Contractor shall submit WSDOT Form 350-041 EF to the Engineer for approval to 41 use a mix design from the QPL. The Contractor may include changes to the job mix 42 formula that have been approved on other contracts. The request to use a mix design 43 from the QPL may be rejected if production of the HMA from another contract is not in 44 compliance with Section 5-04.3(11)D. 45 46 The Contractor shall submit representative samples of the materials that are to be used 47 in the HMA production to the State Materials Laboratory in Tumwater. For HMA mix 48 designs with 20 percent RAP or less by total weight of HMA and no RAS, the Contractor 49 shall submit representative samples of the mineral materials that are to be used in the 50 HMA production; the submittal of RAP samples is not required for these mix designs. 51 For HMA mix designs with greater than 20 percent RAP by total weight of HMA or any 52 amount of RAS the Contractor shall submit representative samples of the mineral I AMENDMENTS TO THE 2014 STANDARD SPECIFICATIONS BOOK Revised: 8/3/15