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334 - 1 . 2 Asphalt Work Mix Categories : Construction of Hot Mix Asphalt Pavement will <br /> fall into one of the following work categories : <br /> 334 -1 . 2 . 1 Asphalt Work Category 1 : Includes the construction of bike paths . <br /> 334 - 1 . 2 . 2 Asphalt Work Category 2 : Includes the construction of new HMA <br /> turn lanes , paved shoulders and other non - mainline pavement locations . <br /> 334- 1 . 2 . 3 Asphalt Work Category 3 : Includes the construction of new mainline <br /> HMA pavement lanes , milling and resurfacing . <br /> 334 - 1 . 3 Mix Types : Use the appropriate HMA mix as shown in Table 334 - 1 . <br /> Table 334 - 1 <br /> HMA Mix Types <br /> Asphalt Work Category Mix Types Traffic Level <br /> 1 Type SP - 9 . 5 , or equivalent A <br /> as determined by the <br /> Engineer <br /> 2 Type SP -9 . 5 , SP - 12 . 5 , or B or C <br /> equivalent as determined <br /> by the Engineer <br /> 3 1 Type SP - 9 . 5 , SP - 12 . 5 1 C <br /> A Type SP mix one traffic level higher than the traffic level specified in the <br /> Contract may be substituted , at no additional cost ( i . e . Traffic Level B may be substituted for <br /> Traffic Level A , etc . ) . <br /> 334 - 1 . 4 Gradation Classification : HMA mixes are classified as either coarse or fine , <br /> depending on the overall gradation of the mixture . Coarse and fine mixes are defined in <br /> 334 - 3 . 2 . 2 . Use only fine mixes . <br /> The equivalent AASHTO nominal maximum aggregate size Superpave mixes <br /> are as follows : <br /> Type SP -9 . 5 9 . 5 mm <br /> Type SP - 12 . 5 12 . 5 mm <br /> 334 -1 . 5 Thickness : The total pavement thickness of the HMA Pavement will be based <br /> on a specified spread rate or plan thickness as shown in the Contract Documents . Before <br /> paving , propose a spread rate or thickness for each individual layer meeting the requirements <br /> of this specification , which when combined with other layers ( as applicable ) will equal the plan <br /> spread rate or thickness . When the total pavement thickness is specified as plan thickness , <br /> the plan thickness and individual layer thickness will be converted to spread rate using the <br /> following equation : <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 mix design <br /> For target purposes only , spread rate calculations shall be rounded to the nearest <br /> whole number. <br /> 32 Technical Specifications <br /> F :\Public Works\ENGINEERING DIVISION PROJECTS\0744-8th St- US1 to 6th Ave\Admim\bid documents\0744 CONTRACT <br /> DOCUMENTS\Technical Specifications . doc <br />