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August 18, 1983 <br />(Revised Dec. 1, 1983) <br />(Revised May 1, 1985) <br />(Revised Dec. 31, 1986) <br />Specification 2331 <br />MODIFIED PLANT MIXED BITUMINOUS PAVEMENT <br />NON-WEARING AND WEARING <br />2331.1 DESCRIPTION <br />A plant mixed bituminous pavement shall be constructed in <br />accordance with Specification 2331, except as modified herein and is <br />subject to any additional modifications included in the Special <br />Provisions and/or Plans. <br />2331.2 MATERIALS <br />A. Aggregate <br />Mineral aggregate shall meet the requirements of Specifi- <br />cation 3139 (Graded Aggregate for Bituminous Mixture); except that <br />the combined aggregate shall be uniformly graded from coarse to fine <br />and shall meet the following gradation and quality requirements: <br />Percent Passing <br />BA-2(A)* BA-2(B)* <br />Sieve Size (1/2" Minus Mixture) (3/4" Minus Mixture) BA-3 ** <br />1-1/2 in. -- -- 100 <br />3/4 in. -- 100 ** <br />1/2 in. 100 -- -- <br /># 4 50-85 50-85 50-85 <br />~ 20 0 2-10 2-10 2-10 <br />* Courses (or lifts) requiring BA-2 aggregates shall be con- <br /> structed in accordance with the following: <br />Compacted Lift Thickness <br />1 inch or less wear <br />Mixture Types <br />A <br />1 inch or less (non-wear) A or B Contractors Option - <br />Unless otherwise designated <br />Greater than 1 inch A or B Contractors Option - <br />(wear or non-wear) Unless otherwise designated <br />** In those courses that permit the use of a BA-3 aggregate, <br />the maximum aggregate particle size permitted shall be equal <br />to or less than one-half the approved paving lift thickness.. <br />-1- <br />