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a <br />I <br />I <br />y <br />I <br />I <br />H <br />334 -1.2 Traffic Levels: The requirements for Type SP Asphalt Concrete mixtures <br />are based on the design traffic level of the project, expressed in 18,000 pound [80 -kNI <br />Equivalent Single Axle Loads (ESAL's). The five traffic levels are as shown in Table 334-1. <br />Table 334 -1 <br />Superpave Traffic Levels <br />Traffic Level <br />Traffic Level (1 x 106 ESAL's) <br />A <br /><0.3 <br />B <br />0.3 to < 3 <br />C <br />3 to <10 <br />D <br />1�! <br />10 to <30 <br />E <br />30 <br />The traffic level(s) for the project are as specified in the Contract. A Type SP <br />mix one traffic level higher than the traffic level specified in the Contract may be <br />substituted, at no cost to the Department (i.e. Traffic Level B may be substituted for <br />Traffic Level A, etc.). <br />334 -1.3 Gradation Classification: The Superpave mixes are classified as either <br />coarse or fine, depending on the overall gradation of the mixture. Coarse and fine mixes <br />are defined in 334 - 3.2.2. <br />The equivalent AASHTO nominal maximum aggregate size Superpave mixes <br />are as follows: <br />TypeSP- 9. 5 ............................... ............................9.5 mm <br />Type SP- 12. 5 ........................ ............................... 12.5 mm <br />Type SP- 19. 0 ........................ ............................... 19.0 mm <br />334 -1.4 Thickness: The total thickness of the Type SP asphalt layer(s) will be the <br />plan thickness as shown in the Contract documents. Before paving, propose a thickness <br />for each individual layer meeting the requirements of this specification, which when <br />combined with other layers (as applicable) will equal the plan thickness. For construction <br />purposes, the plan thickness and individual layer thickness will be converted to spread rate <br />based on the maximum specific gravity of the asphalt mix being used, as well as the <br />minimum density level, as shown in the following equation: <br />Non -SI Units <br />I <br />Spread rate (lbs /yd2) = t x Gmm x 43.3 <br />Where: t = Thickness (in.) (Plan thickness or individual layer <br />thickness) <br />Gmm = Maximum specific gravity from the verified mix design <br />SI Units <br />Spread rate (kg /M2) = t x Gmm x 0.928 <br />01000 -52 <br />03- 4122.D ;,� <br />