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I It ITT ITT, IN I TITIRT IN Ddb: x >"1'�,ak r5'" r ?a , P ll I T IN, INg 1 ;�„ . 4 - WNI �'� T'lIII%IIt A The traffic level (s) for the project are as specified in the Contract. A Type SP mix one traffic level higher than the traffic level specified in the Contract may be substituted, at no cost to the Department (i . e . Traffic Level B may be substituted for Traffic Level A . etc . ) . IN 3344 .3 Gradation Classification : The Superpave mixes are classified as either coarse or fine , depending on the overall gradation of the mixture . Coarse and fine mixes are defined in 334-3 . 2 . 2 . The equivalent AASHTO nominal maximum aggregate size Superpave mixes are as follows : TypeSP-9 . 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 . 5 mm IN Type SP - 12 . 5 . . . . . . . . . . . 12 . 5 mm TypeSP- 19 . 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 . 0 mm 3344 .4 Thickness : The total thickness of the Type SP asphalt layer(s) will be the plan thickness as shown in the Contract Documents . Before paving, propose a thickness for each I ndividual layer meeting the requirements of this specification, which when combined with other layers (as applicable) will equal the plan thickness . For construction purposes , the plan thickness and individual layer thickness will be converted to spread rate based on the maximum specific gravity of the asphalt mix being used, as well as the minimum density level , as shown in the following equation : Spread rate (lbs/yd2) = It x Gmm x 43 . 3 Where : It = Thickness (in . ) (Plan thickness or individual layer thickness) Gmm = Maximum specific gravity from the verified mix design 66 The weight of the mixture shall be determined as provided in 320 -2 . 2 . For target purposes only, spread rate calculations should be rounded to the nearest whole number. Note : Plan quantities are based on a Gmm of 2 . 540, corresponding to a spread rate of 110 lbs/yd2-in . Pay quantities will be based on the actual maximum specific gravity of the mix being used. 334- 1 .4 . 1 Layer Thicknesses - Fine Mixes : The allowable layer thicknesses for fine Type SP Asphalt Concrete mixtures are as follows : Type SP-9 . 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1 1 /2 inches Type SP- 12 . 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 /2 - 2 1 /2 inches Type SP - 19 . 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3 inches In addition to the minimum and maximum thickness requirements , the following restrictions are placed on fine mixes when used as a structural course : Type SP- 9 . 5 - Limited to the top two structural layers , two layers maximum . Type SP45 — May not be used on Traffic Level D and E applications . Type SP - 19 . 0 - May not be used in the final (top) structural layer. 3344 .4 .2 Layer Thicknesses - Coarse Mixes : The allowable layer thicknesses for coarse Type SP Asphalt Concrete mixtures are as follows : - 82 - FPID ( S ) : 423186 - 1 - 58 -01 I INx"