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Isolation (expansion) joints shall be straight and at right angles to the alignment, vertical to <br />the surface, and shall provide complete separation of the Portland Cement Concrete. Joint <br />material shall be installed using a 2x4 as a support prior to pouring the concrete. Isolation <br />joints shall be constructed opposite existing isolation joint. When multiple panels are <br />replaced, isolation joints shall be installed at every 3rd panel. <br />All joints in PCC within or abutting the construction area shall be sealed at the permittee's <br />expense. <br />3.B.2 Asphalt Cement Concrete Streets. <br />In addition to the technical provisions of 3.B Technical Provisions (Placement of Facilitiesl, work <br />within Asphalt Cement Concrete (AC) streets and alleys shall conform to the following require- <br />ments: <br />AC in utility trench patches shall be placed to a depth matching the existing pavement or 4 <br />inches, which ever is greater. The top course shall be class "C" mix and shall not be placed <br />any thicker than 2 inches or thinner than 1 inch. Where the existing pavement is AC over <br />PCC, CTB or ATB, replacement depth shall be the combined depth of the AC and PCC, <br />CTB or ATB. <br />The permittee may substitute PCC for AC for all except the top 4 four inches when replacing <br />existing pavement sections. If the permittee uses a 9 sack concrete mix design and places <br />the concrete at an approximate slump of 2 inches, final asphalt concrete may be placed after <br />allowing the concrete 2 hours to cure. <br />2. Tack coat asphalt conforming to section 211 of the Standard Specifications shall be <br />uniformly applied to the existing abutting AC, PCC, ATB or CTB surfaces. <br />3. The materials and the placement and compaction of AC shall conform to the requirements <br />of section 211 of the Standard Specifications. <br />Compaction of the surface lift of AC shall be accomplished using a steel wheel roller of <br />adequate size to insure aggregate interlocking and thorough compaction to the. above- <br />referenced specifications. A vibrator plate compactor shall not be acceptable for finish lift <br />compaction. <br />4. After final compaction, all joints between new and existing paving shall be sealed with CSS- <br />1 paving asphalt, and sanded to prevent pickup and tracking. The asphalt shall be applied <br />with a pressurized sprayer and shall completely overlap the exiting and new paving to ensure <br />a complete seal of the joint. <br />Utility & R/'W Permit Manual <br />Exhibit A - 33 <br />C:\WINDOWS\Temporary Internet Files\OLKB202\03rowrlexa.wpd -Manual (03ROWR 1).WPD(11/07/03) <br />