402Asphalt Skid Resistant Pavement

402.1-DESCRIPTION: This work shall consist of constructing a Hot-Mix Asphalt (HMA) and Warm-Mix (WMA) Skid Resistant Wearing Coarse or a Superpave (HMA or WMA) Skid Resistant Wearing Coarse in accordance with the requirements of the Section 401 Asphalt Specification with the following exceptions and additions: 402.2-MATERIALS: The coarse aggregate shall consist of gravel, slag, or other acceptable polish resistant aggregate, or combinations thereof, meeting the requirement of Subsections 703.1 through 703.3, except as amended in this subsection. When stone or gravel is specified in the contract, the coarse aggregate shall consist of gravel or other acceptable polish resistant aggregate, or combination thereof meeting the requirements of 703.1 through 703.3, except as amended in this subsection. When slag is specified in the contract, the coarse aggregate shall be slag which meets the requirements o f 703.3, except as amended in this subsection. Acceptable dolomite may be used alone or as a part of a coarse aggregate blend on roadways with a projected ESAL value of less than 3,000,000. On roadways with a projected ESAL value of 3,000,000 or greater, acceptable dolomite may be used only as a part of the coarse aggregate blend and shall not exceed 50% of that blend. The total of shale (determined by MP 703.00.27), coal and other lightweight deleterious material (determined by ASTM C123) and friable pa rticles (determined by MP 703.01.20) shall not exceed three percent (3%). 402.2.1-Marshall Mix Designs: For Marshall mix designs, the coarse aggregate or blends thereof shall have a minimum of 80 percent (80%) two-face fracture, and, except for those carbonate rocks which may be designated as acceptable polish resistant aggregate, the portion obtained on the No. 4 (4.75 mm) sieve shall contain no more than 15 percent (15%) carbonate particles. The total thin and elongated pieces, when tested as per MP 703.00.25, shall not exceed five percent (5%). 402.2.2-Superpave Mix Designs: For Superpave mix designs, the coarse aggregate or blends thereof shall have a minimum angularity requirement as specified in MP 401.02.28, Table 401.02.28C and, except for those carbonate rocks which may be designated as acceptable polish resistant aggregate, the portion obtained on the No. 4 (4.75 mm) sieve shall contain no more than 15 percent (15%) carbonate particles. Flat and elongated particles shall be tested in accordance with ASTM D4791 and the procedure modification referenced in MP 703.00.25. The total flat and elongated particles, measured at a 5:1 ratio, shall not exceed ten percent (10%) by weight for all pavements where the estimated traffic level is greater than or equal to 0.3 million ESALs. 402.3-FINE AGGREGATE: 402.3.1-Marshall Mix Designs: Fine aggregate shall meet the requirements of 702.3. 181 402.3.2-Superpave Mix Designs: Fine aggregate shall meet the requirements of 702.3 along with the addition of the fine aggregate angularity and sand equivalent requirements noted in MP 401.02.28, Table 401.02.28C. 402.4-MIXING: The skid resistant paving mix shall be type designated on the plans. 402.5-MEASURMENT AND PAYMENT: Method of measurement and basis of payment will be in accordance with the applicable sections of Section 401. 402.6-PAY ITEM: ITEM DESCRIPTION UNIT 402001-* “design method” Asphalt Skid Resistant Pavement, “aggregate type”, Type “mix type” Ton * Sequence number “design method” shall be either Marshall or Superpave “aggregate type” shall be either stone and gravel or slag “mix type” from Table 401.4.2A or 401.4.2B 182