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February 26, 2018 Page 3 of 7 <br />Mixture Type Type A* Type B* Type C* <br />Surface <br />Nominal Maximum <br />Aggregate Sizes <br />4.75 mm <br />9.5 mm <br />12.5 mm <br />4.75 mm <br />9.5 mm <br />12.5 mm <br />4.75 mm <br />9.5 mm <br />12.5 mm <br /> Recommended PG Binder Grade 64-22 64-22 70-22 <br />Intermediate <br />Nominal Maximum <br />Aggregate Sizes <br />9.5 mm <br />12.5 mm <br />19.0 mm <br />25.0 mm <br />9.5 mm <br />12.5 mm <br />19.0 mm <br />25.0 mm <br />9.5 mm <br />12.5 mm <br />19.0 mm <br />25.0 mm <br /> Recommended PG Binder Grade 64-22 64-22 64-22 <br />Base <br />Nominal Maximum <br />Aggregate Sizes <br />19.0 mm <br />25.0 mm <br />19.0 mm <br />25.0 mm <br />19.0 mm <br />25.0 mm <br /> Recommended PG Binder Grade 64-22 64-22 64-22 <br />* A higher category mix may be used for a lower category application at no additional cost to the agency. <br />** Heavy trucks are commercial vehicles with normally 2 axles, six tires or larger. <br />*** This information is provided as an approximate comparison only. <br /> <br />Asphalt binder grades are recommended in the above table based on mixture type and designation. <br />Adjustments to the binder grades may be required based on the amount of recycled materials used. <br />Guidelines are contained in HMA.08. The plant discharge temperature for any mixture shall not be more <br />than 315°F whenever PG 58-28, PG 64-22, PG 64-28, or PG 70-22 binders are used and not more than 325° <br />F whenever PG 70-28 or PG 76-22 binders are used. HMA mixtures may be produced by using a water <br />injection foaming device or additives as specified and according to the manufactures recommendations. <br /> <br />HMA.05 Volumetric Mix Design <br />Design Mix Formula (DMF) shall be determined for each mixture from a volumetric mix design by a design <br />laboratory selected from INDOT’s list of Approved Mix Design Laboratories. A volumetric mixture shall be <br />designed in accordance with Section 401.05 and AASHTO R 35 with the following tables and exceptions. <br />All loose mixture shall be conditioned for four hours in accordance with AASHTO R 30 prior to testing. <br />Material Adjustment Factor (MAF) shall not apply. <br /> <br />GYRATORY COMPACTION EFFORT <br />Mix Type Nini Ndes Nmax <br />Max. % <br />Gmm @ Nini <br />Max. % <br />Gmm @ Nmax <br />A 6 50 75 91.5 98.0 <br />B 7 75 115 90.5 98.0 <br />C 8 100 160 89.0 98.0 <br /> <br /> <br />VOIDS FILLED WITH ASPHALT, VFA, CRITERIA @ Ndes <br />Type VFA % <br />A 70-80 <br />B 65-78 <br />C 65-75