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RRFB PEDESTRIAN SAFETY October 31, 2025 <br />STATE FUND # HLP-PB25(004) <br />WO 3807 <br />Page 51 of 82 <br />1 <br />2 <br />3 DIVISION5.GR5 <br />4 Division 5 <br />5 Surface Treatments and Pavements <br />6 <br />7 COE 5-04.docx <br />8 5-04.3Construction Requirements <br />9 <br />10 5-04.3(7)A Mix Design <br />11 (March 10, 2010 APWA GSP) <br />12 <br />13 Delete this section and replace it with the following; <br />14 <br />15 1.General. Prior to the production of HMA, the Contractor shall determine a design <br />16 aggregate structure and asphalt binder content in accordance with WSDOT Standard <br />17 Operating Procedure 732. Once the design aggregate structure and asphalt binder <br />18 content have been determined, the Contractor shall submit the HMA mix design on <br />19 DOT form 350-042 demonstrating the design meets the requirements of Sections 9- <br />20 03.8(2) and 9-03.8(6). HMA accepted by nonstatistical evaluation requires a mix <br />21 design verification. For HMA accepted by commercial evaluation only the first page <br />22 of DOT form 350-042 and the percent of asphalt binder is required. In no case shall <br />23 the paving begin before the determination of anti-strip requirements has been made. <br />24 Anti-strip requirements will be determined by: <br />25 <br />26 a. Testing by WSDOT in accordance with TM 718. <br />27 b. Testing by Contractor in accordance with WSDOT TM 718. <br />28 c. Historical aggregate source ant-strip use provided by WSDOT. <br />29 <br />30 The mix design will be the initial Job Mix Formula (JMF) for the HMA being produced. <br />31 Any additional adjustments to the JMF will require the approval of the Project <br />32 Engineer and may be made per Section 9-03.8(7). <br />33 <br />34 2.Mix Design Verification. Verification shall be accomplished by one of the following <br />35 processes: <br />36 <br />37 a. Submit samples to WSDOT State Materials Lab for WSDOT verification <br />38 testing in accordance with WSDOT Standard Specifications. <br />39 b. The contracting agency will perform tests to verify the mix design in <br />40 accordance with the Field Verification Testing Process. <br />41 c. Reference a mix design that has been previously verified by the Field <br />42 Verification Testing Process or verified by WSDOT State Materials Lab <br />43 on a previous project. <br />44 d. Perform Field Verification Testing on a sample of HMA provided by the <br />45 Contractor prior to paving. <br />46 <br />47 Mix design verification is valid for one year from the date of verification. At the discretion of <br />48 the Engineer, agencies may accept mix designs verified beyond the verification year with <br />49 certification from the Contractor that the materials and sources are the same as those <br />50 shown on the original mix design. <br />51