Lakeside Industries Inc. 6/21/2021

I 1 • The proposed HMA mix design on WSDOT Form 350-042 with the seal and ' 2 certification (stamp & signature) of a valid licensed Washington State 3 Professional Engineer. 4 • The Mix Design Report for the proposed HMA mix design developed by a 5 qualified City or County laboratory that is within one year of the approval date.** I 6 7 The mix design shall be performed by a lab accredited by a national authority such as I 8 Laboratory Accreditation Bureau, L-A-B for Construction Materials Testing, The 9 Construction Materials Engineering Council (CMEC's) ISO 17025 or AASHTO 10 Accreditation Program (AAP) and shall supply evidence of participation in the AASHTO: 11 resource proficiency sample program. I 12 13 Mix designs for HMA accepted by Nonstatistical evaluation shall; 14 I 15 • Have the aggregate structure and asphalt binder content determined in 16 accordance with WSDOT Standard Operating Procedure 732 and meet the 17 requirements of Sections 9-03.8(2), except that Hamburg testing for ruts and I 18 stripping are at the discretion of the Engineer, and 9-03.8(6). 19 • Have anti-strip requirements, if any, for the proposed mix design determined in 20 accordance with AASHTO T 283 or T 324, or based on historic anti-strip and 21 aggregate source compatibility from previous WSDOT lab testing. 22 23 At the discretion of the Engineer, agencies may accept verified mix designs older than 12 I 24 months from the original verification date with a certification from the Contractor that the 25 materials and sources are the same as those shown on the original mix design. 26 I 27 Commercial Evaluation Approval of a mix design for"Commercial Evaluation" will be 28 based on a review of the Contractor's submittal of WSDOT Form 350-042 (For 29 commercial mixes, AASHTO T 324 evaluation is not required) or a Mix Design from the I 30 current WSDOT QPL or from one of the processes allowed by this section. Testing of the 31 HMA by the Contracting Agency for mix design approval is not required. 32 I 33 For the Bid Item Commercial HMA, the Contractor shall select a class of HMA and 34 design level of Equivalent Single Axle Loads (ESAL's) appropriate for the required use. 35 I 36 5-04.2(2)A Vacant 37 38 5-04.2(2)B Using Warm Mix Asphalt Processes I 39 The Contractor may elect to use additives that reduce the optimum mixing temperature 40 or serve as a compaction aid for producing HMA. Additives include organic additives, 111 41 chemical additives and foaming processes. The use of Additives is subject to the 42 following: 43 I 44 • Do not use additives that reduce the mixing temperature more than allowed in 45 Section 5-04.3(6) in the production of mixtures. 46 • Before using additives, obtain the Engineer's approval using WSDOT Form 350- I 47 076 to describe the proposed additive and process. I 2021 PAVEMENT MAINTENANCE OVERLAY PAGE 48 OF 84 DIVISION T WORK ORDER 3751 MARCH 29,2021