Granite Construction 5/14/2020 - Laserfiche WebLink

I 1 The mix design shall be performed by a lab accredited by a national authority such as 2 Laboratory Accreditation Bureau, L-A-B for Construction Materials Testing, The Construction 3 Materials Engineering Council (CMEC's) ISO 17025 or AASHTO Accreditation Program 4 (AAP) and shall supply evidence of participation in the AASHTO: resource proficiency 5 sample program. I 6 7 Mix designs for HMA accepted by Nonstatistical evaluation shall; 8 9 • Have the aggregate structure and asphalt binder content determined in accordance 10 with WSDOT Standard Operating Procedure 732 and meet the requirements of 11 Sections 9-03.8(2), except that Hamburg testing for ruts and stripping are at the I 12 discretion of the Engineer, and 9-03.8(6). 13 • Have anti-strip requirements, if any, for the proposed mix design determined in 14 accordance with AASHTO T 283 or T 324, or based on historic anti-strip and 15 aggregate source compatibility from previous WSDOT lab testing. 16 17 At the discretion of the Engineer, agencies may accept verified mix designs older than 12 18 months from the original verification date with a certification from the Contractor that the 19 materials and sources are the same as those shown on the original mix design. 20 I 21 Commercial Evaluation Approval of a mix design for"Commercial Evaluation" will be based 22 on a review of the Contractor's submittal of WSDOT Form 350-042 (For commercial mixes, 23 AASHTO T 324 evaluation is not required) or a Mix Design from the current WSDOT QPL or , 24 from one of the processes allowed by this section. Testing of the HMA by the Contracting 25 Agency for mix design approval is not required. 26 11 27 For the Bid Item Commercial HMA, the Contractor shall select a class of HMA and design 28 level of Equivalent Single Axle Loads (ESAL's) appropriate for the required use. 29 30 5-04.2(2)A Vacant 31 32 5-04.2(2)B Using Warm Mix Asphalt Processes I 33 The Contractor may elect to use additives that reduce the optimum mixing temperature or 34 serve as a compaction aid for producing HMA. Additives include organic additives, chemical I 35 additives and foaming processes. The use of Additives is subject to the following: 36 37 • Do not use additives that reduce the mixing temperature more than allowed in Section I 38 5-04.3(6) in the production of mixtures. 39 • Before using additives, obtain the Engineer's approval using WSDOT Form 350-076 40 to describe the proposed additive and process. 41 42 5-04.3 Construction Requirements 43 I 44 5-04.3(1) Weather Limitations 45 Do not place HMA for wearing course on any Traveled Way beginning October 1st through 46 March 31st of the following year without written concurrence from the Engineer. 47 i 2020 PAVEMENT MAINTENANCE OVERLAY PAGE 44 OF 79 SPECIAL PROVISIONS WORK ORDER 3727 FEBRUARY 20,2020