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CC &V PROJECT NO. SC -07 -002 <br />REVISION OF SECTION 401 <br />COMPACTION OF HOT MIX ASPHALT <br />Section 401 of the Standard Specifications is hereby revised for this project as follows: <br />In subsection 401.17, delete the first paragraph and replace with the following: <br />In subsection 401.17, second to last paragraph, delete the first sentence and replace with the following: <br />April 26, 2012 <br />401.17 Compaction. The hot mix asphalt shall be compacted by rolling. Both steel wheel and pneumatic tire <br />rollers will be required. The number, weight, and type of rollers furnished shall be sufficient to obtain the required <br />density while the mixture is in a workable condition. Compaction shall begin immediately after the mixture is <br />placed and be continuous until the required density is obtained. When the mixture contains unmodified asphalt <br />cement (PG 58 -28 or PG 64 -22) or modified (PG 58 -34), and the surface temperature falls below 185 °F, further <br />compaction effort shall not be applied unless approved, provided the Contractor can demonstrate that there is no <br />damage to the finished mat. If the mixture contains modified asphalt cement (PG 76 -28, PG 70 -28 or PG 64 -28) <br />and the surface temperature falls below 230 °F, further compaction effort shall not be applied unless approved, <br />provided the Contractor can demonstrate that there is no damage to the finished mat. <br />Warm Mix Asphalt compaction requirements shall conform to CP 59. <br />In subsection 401.17, delete the third paragraph and replace with the following: <br />SMA shall be compacted to a density of 93 to 97 percent of the daily theoretical maximum specific gravity, <br />determined according to CP 51. All other HMA shall be compacted to a density of 92 to 96 percent of the daily <br />theoretical maximum specific gravity, determined according to CP 51. If more than one theoretical maximum <br />specific gravity test is taken in a day, the average of the theoretical maximum specific gravity results will be used <br />to determine the percent compaction. Field density determinations will be made in accordance with CP 44 or 81. <br />After production paving work has begun, a new Roller Pattern shall be demonstrated when a change in the <br />compaction process is implemented. <br />