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February 26, 2018 Page 5 of 7 <br />HMA Mixtures with a binder replacement greater than 25.0% and less than or equal to 40.0% by weight <br />of total binder content utilizing RAP or a blend of RAP and RAS shall use a binder grade with the upper <br />and lower temperature classification reduced by 6° C from the specified binder grade as shown below. <br /> <br />Specified Binder Grade for Binder <br />Replacement ≤ 25.0% <br />Specified Binder Grade for Binder <br />Replacement >25.0% and ≤40.0% <br />PG 64-22 PG 58-28 <br />PG 70-22 PG 64-28 <br />PG 76-22 PG 70-28 <br /> <br /> HMA.09 Acceptance of Mixtures <br />Acceptance will be on the basis of a Type D Certification in accordance with Section 916(d). The HMA <br />Certification shall be the quality control test representing the material and shall include air voids at Ndesign <br />and binder content for material supplied to the project. Type D Certification shall be submitted to the <br />Contracting Agency’s representative each day in which material is received. <br /> <br />The Minimum Testing Frequency for Type D Certification. <br />Base and Intermediate One sample for each 1,000 ton <br />Surface One sample for each 600 ton <br /> <br /> <br />CONSTRUCTION REQUIREMENTS <br /> <br />HMA.10 General <br />Shall be in accordance with Section 402.10. <br /> <br />HMA.11 Preparation of Surfaces to be Overlaid <br />Milling of an existing surface shall be in accordance with Section 306. Surfaces on which a mixture is <br />placed shall be free from objectionable or foreign materials at the time of placement. <br /> <br />PCCP, milled asphalt surfaces and asphalt shall be tacked according to Section 406. Contact surfaces of <br />curbing, gutters, manholes and other structures shall be tacked in accordance with Section 406. <br /> <br />HMA.12 Weather Limitations <br />HMA courses less than 110 lb/syd are to be placed when the ambient and surface temperatures are 60o F <br />or above. HMA courses equal to or greater than 110 lb/syd but less than 220 lb/syd are to be placed when <br />the ambient and surface temperatures are 45o F or above. HMA courses equal to or greater than 220 <br />lb/syd are to be placed when the ambient and surface temperatures are 32o F or above. Mixture shall not <br />be placed on a frozen subgrade. However, HMA courses may be placed at lower temperatures provided <br />the density of the HMA course is in accordance with Section 402.16 or if approved by the Contracting <br />Agency’s representative. <br /> <br />HMA.13 Spreading and Finishing <br />Shall be in accordance with Section 402.13. <br /> <br />HMA.14 Joints <br />Shall be in accordance with Section 402.14. <br />