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    SECTION 02575

    PAVEMENT REPAIR

   PART 1 - GENERAL

   1.01 SECTION INCLUDES

    A. The work specified by this section shall consist of repairing or replacing all damaged pavement, whether public or private. Dirt shoulders, roads, streets, drives, and walks are to be restored to their original condition as an incidental part of the installation of utilities. Repair damaged base on either side of a trench wherever necessary. Trim the wearing surface to neat lines and/or perform cold plane milling outside of the trench wall, and repave the entire area as specified below and as shown on the drawings or on the standard drawings. Adjust all castings and valve boxes to the required grade for restoration as an incidental part of lump sum work.

    B. Both these specifications and the drawings make reference to the current edition of the standard specifications of the Tennessee Department of Transportation (TDOT). Even though the weather limitations, construction methods, and materials specifications contained in the TDOT specifications may not be explicitly repeated in these specifications, they shall, wherever applicable to the work called for by this section, be considered as implied and therefore adhered to. However, the various subsections "Basis for Payment" contained in the TDOT specifications shall not be considered applicable.

    C. Refer to other sections for work related to that covered by this section.

    D. Where milling is required, the milling shall be performed after asphaltic binder is placed.

    E. Full width asphaltic concrete surface shall not be placed for a minimum of 42 days after trench binder is placed.

    F. Where full width milling and/or surfacing is required the length shall be from the first service to the last, including additional discovered services. Where full width milling and/or surfacing is required in successive segments, the length shall be from manhole centerline to manhole centerline so as not to "checkerboard" the restoration. If the line segment in a cul-de-sac, the full area of the cul-de-sac shall be treated.

   PART 2 - PRODUCTS

   2.01 MATERIALS

    A. Mineral Aggregate Base: Class A, Grading D crushed stone (TDOT specifications, Section 303, Subsection 903.05).

    B. Bituminous Prime Coats: Cutback asphalt, Grade RC-250, or emulsified asphalt, Grade AE-P (Section 402, Subsections 904.02 and 904.03).

    C. Crushed Stone Chips: Size 6 or Size 7 (Subsection 903.14).

    D. Double Bituminous Surface: For both courses, either cutback asphalt, Grade RC-800 or RC-3000, or emulsified asphalt, Grade RS-2 (Subsections 904.02 and 904.03).

    E. Asphaltic Concrete Binder: Grading B or C, as directed by the Engineer (Section 307).

    F. Bituminous Tack Coat: Grade AE-3 (Section 403, Subsection 904.03).

    G. Asphaltic Concrete Surface: Grading E (Section 411).

    H. Quick Dry Traffic Marking Paint (White and Yellow): Subsection 910.05.

   PART 3 - EXECUTION

   3.01 SUBGRADE

    A. Before any base material is installed, compact the subgrade of the area to be paved to 95% of optimum density as determined by ASTM D698 (Standard Proctor).

    B. The backfill material shall contain no topsoil or organic matter. For all areas where subgrade has been prepared, test for uniformity of support by driving a loaded dump truck at a speed of 2 to 3 mph over the entire surface. Make further improvements on all areas that show a deflection of 1" or more. When completed, the finished subgrade shall be hard, smooth, stable, and constructed in reasonably close conformance with the lines and grades that existed prior to beginning construction.

    C. When a base course is compacted, cut back the surface course of the existing pavement a minimum of 1' beyond the limit of the joint between the old and new base course or as shown on the standard drawings. Take special care to ensure good compaction of the new base course at the joint. Apply and compact the surface to conform to the existing pavement so that it will have no surface irregularity.

   3.02 BASE

    A. Install a mineral aggregate base of the type specified above in accordance with Section 303 of the TDOT specifications. The maximum compacted thickness of any one layer shall be 6", and the total thickness of the base shall be that indicated by the standard drawings or as shown on the plans.

   3.03 SEAL COAT SURFACE

    A. Uniformly apply a bituminous prime coat of either emulsified asphalt, Grade AE-P, or cutback asphalt, Grade RC-250, over the entire width of the area to be surfaced at a rate of 0.3 gallon per square yard. Immediately after application, uniformly cover the entire area with Size 7 crushed stone chips at a rate of 12 pounds per square yard.

   3.04 DOUBLE BITUMINOUS SURFACE

    A. Apply the first course at a rate of 0.38 to 0.42 gallon per square yard with either emulsified asphalt, Grade RS-2, or cutback asphalt, Grade RC-800 or RC-3000, and then immediately cover with Size 6 crushed stone chips at a rate of 33 to 37 pounds per square yard. After this is rolled, apply the second course at a rate of 0.30 to 0.35 gallon per square yard, and at once uniformly cover with Size 7 chips at a rate of 20 to 25 pounds per square yard. Then roll the entire area.

    B. After the application of the cover aggregate, lightly broom or otherwise maintain the surface for a period of 4 days, or as directed by the Engineer. Maintenance of the surface shall include the distribution of cover aggregate over the surface to absorb any free bitumen and cover any areas deficient in aggregate. Sweep excess material from the entire surface with rotary brooms. Sweep the surface at the time determined by the Engineer.

   3.05 ASPHALTIC CONCRETE BINDER

    A. Apply a bituminous prime coat of emulsified asphalt, Grade AE-P, or cutback asphalt, Grade RC-250, at a rate of 0.38 to 0.42 gallon per square yard. Take care to prevent the bituminous material's splashing on exposed faces of curbs and gutters, walls, walks, trees, etc.; if such splashing does occur, remove it immediately. After the prime coat has been properly cured, apply an asphaltic concrete binder to the thickness shown on the standard drawings or the plans.

    B. Carefully place the material to avoid segregation of the mix. Broadcasting of the material will not be permitted. Remove any lumps that do not readily break down.

    C. If milling of the street is required, the thickness shown shall be maintained after milling.

   3.06 ASPHALTIC CONCRETE SURFACE

    A. If the asphaltic concrete surface course is to be placed directly on the mineral aggregate base, place a bituminous prime coat as described above. If, however, the surface course is to be placed on a binder course, then apply a bituminous tack coat of the sort specified above under PRODUCTS at a rate of 0.05 to 0.10 gallon per square yard. Take care to prevent the bituminous material's splashing on exposed faces of curbs, gutters, walls, walks, trees, etc.; if such splashing does occur, remove it immediately. After the prime or tack coat has been properly cured, apply the asphaltic concrete to the thickness shown on the drawings or standard drawings. Apply the surface course as described above for the binder course.

   3.07 SMOOTHNESS

    A. The finished surfaces shall conform to the lines and grades that existed prior to construction. No deviations, variations, or irregularities exceeding 1/4" in any direction when tested with a 12' straightedge will be permitted in the finished work, nor will any depressions that will not drain. Correct all such defects.

   3.08 SAMPLING AND TESTING

    A. Submit to the Engineer test reports made by an independent testing laboratory on the crushed stone aggregate, bituminous materials, and asphaltic concrete design mixes, and obtain his approval of these reports before starting paving operations.

    B. Tests shall be made on the completed elements of the pavement to ascertain the compacted thickness of the base and surface courses. If sections with deficient thicknesses are found, the full section for a reasonable distance on each side of the deficiency shall be refused. Remove and reinstall all such sections. Patch all test holes in connection with thickness tests.

    C. When making surface tests, furnish one man to mark all surface defects for corrections.

   3.09 PAVEMENT MARKINGS

    A. Remark the restored area with pavement markings as existed prior to construction per Public Works.

    END OF SECTION

Rembco Geotechnical Contractors specializes in slope stabilization, foundation repair and support, shoring, grouting, soil nails, micropile installations, and sinkholes. We are experienced in these applications: micro piles, sinkhole repair, permeation grouting, pressure grouting, soil nails, chemical grouting, micropiles, compaction grout, rock anchors and compaction piles. Our specialties are rock anchor, chemical and compaction grouting, mini piles, sinkhole repair, micropiles, and soil nailing. We use a problem-solving approach in the geotechnical portions of buildings, bridges, water plants, sewage plants, tunnels, sinkholes, caisson, and roads. Rembco techniques apply when adding new real estate structures: especially rock anchor, microfine grouting, soil nailing, micropile installations for foundation support. Add URL Construction, Drilling and Concrete