Preparation of Existing Base and/or Hot Mix Asphalt (HMA) 1. Remove by cold milling the existing HMA to the specified depth, width, grade and crosssection. Backfill and compact all depressions left by removing material below the specified rate. The aggregate base shall be backfilled with a new aggregate meeting the requirements of 21AA in Section 902 of the MDOT 2003 Standard Specification for Construction. The Contractor shall certify that all materials meet these specifications and produce copies of MDOT test results for the materials to be used on this project. The aggregate base shall be placed by the requirements of Section 302 of the MDOT 2003 Standard Specification for Construction. HMA shall be patched with new HMA when the overlay is placed. The contractor will bear all costs associated with this backfilling and compaction. Immediately after cold-milling, clean the surface with compressed air and sweeping. All loose materials shall be removed and properly disposed of. No discharge into catch basins. Property monument markers preserved. Placement of Hot Mix Asphalt (HMA) Overlay 1. Apply the bond coat uniformly to the clean, dry surface with a pressure distributor. A bond coat shall also be applied to vertical surfaces, against which asphalt will be placed. The bond coat shall be applied far enough before the paving operation to allow proper curing before paving. Unless otherwise specified, the bond coat shall be as defined in Section 502 of the MDOT Standard Specification for Construction. No discharge into catch basins. Property monument markers preserved. 2. Materials shall conform to MDOT specifications and Special Provisions 03SP501 (G & H). The Contractor shall certify that all materials meet these specifications and produce copies of MDOT test results for the materials to be used on this project. Paving operations shall be performed by Division 5 of the 2003 MDOT Standard Specifications for Construction and Special Provision 03SP502 (O). The Contractor shall provide a current MDOT mix design for the HMA, which shall be approved by City personnel before. 3. City personnel or consultants may inspect and test paving operations at anytime. The costs associated with such inspection and testing will be the responsibility of the City. 4. In non-curbed areas, the contractor shall strictly adhere to the designated limits of pavement. Pay will only be made for paving more than the fixed widths. 5. HMA overlay will be measured in square yards. Payment for all HMA overlay shall be limited to the measured area multiplied by the proposed application rate plus 5 percent. The City will not pay for any overruns.
