613 DRIVEWAYS AND ENTRANCES

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613.01 DESCRIPTION
Construct asphalt or concrete driveways and entrances. Ensure that the driveways and entrances are constructed according to the most recent accessibility guidelines of the ADA.
613.02 MATERIALS
Refer to 701.02, 705.02, 708.02, 709.02, and the following:
Graded Aggregate for Base Course       901.01
Crusher Run Aggregate CR-6       901.01
Curing Materials       902.07
Form Release Compound       902.08
Concrete Mix 7 and 9       902.10
Asphalt Mix       Section 904
Welded Wire Fabric       908.05
Joint Sealer       911.01
Preformed Joint Fillers       911.02
Borrow Excavation       916.01
Asphalt Millings or Grindings       Size of individual particles shall be less than 2 in. as determined visually
613.03 CONSTRUCTION
613.03.01 Concrete Driveways and Entrances
(a) Excavation. As specified in 602.03.01(a).
(b) Forms
(1) Fixed Form Method. Use full depth steel or wood forms. Use forms that are straight, free from warp, and of sufficient strength to resist the pressure of the concrete. Brace and stake the forms so that they remain in both horizontal and vertical alignment. Thoroughly clean and coat forms with form release compound each time they are used. Allow the concrete to set for at least 12 hours before removing the forms.
(c) Concreting. Before placing concrete, moisten the subgrade with as much water as it can absorb. Mix the concrete as specified in 915.03.05. Volumetric batching and continuous mixing will be permitted. Deposit the concrete on the prepared subgrade in successive batches to the full width of the driveways and entrances. Thoroughly spade along the edges and tamp the entire surface area to eliminate voids. Strike off and screed the concrete to the top of the forms.
(d) Finishing. Float the surface and apply a broom finish. Do not plaster the surface. Use a 1/4 in. edging tool on all outside edges and all joints.
(e) Joints. Place joints as specified in 602.03.01(g), up to a maximum of 15 ft between contraction joints. Tool or saw dummy joints a minimum of 3/4 in. deep. Match adjacent joints in curb or pavement. Place expansion joints, up to a maximum of 45 ft spacing between joints, with the material to the full depth of the concrete.
(f) Cold Weather Construction and Curing. As specified in 520.03.02 and 520.03.12, except the requirement for an approved spraying machine with drive wheels is waived when using the liquid membrane forming compound method. Do not allow pedestrian and vehicular traffic during the curing period.
(g) Expansion Joint Sealing. Prior to sealing, clear dirt and other foreign material from the expansion joints. Ensure that joint walls and all surfaces to which the sealing material is to adhere are surface dry for at least three hours prior to sealing. Do not seal the joints until they are acceptable to the Engineer. Ensure that the surface of the sealing compound is not more than 1/8 in. below the driveways and entrances surface.
613.03.02 Asphalt Driveways and Entrances
(a) Excavation or Milling. As specified in 602.03.01(a) or 508.03.
(b) Placement. Place asphalt mix as specified in 504.03.06.
(c) Compaction. Use an approved roller. In areas inaccessible to a roller, a vibrating plate compactor or hand tamping may be used. The asphalt mix shall be uniformly compacted and start compaction as soon as the asphalt mix can be compacted without displacement and continue until the material is thoroughly compacted and all marks have been removed.
613.03.03 Grading Adjustment. When grading adjustment is required for installation of driveways and entrances, adjust the grading using topsoil, crusher run aggregate CR-6, asphalt millings or grindings, subsoil, common borrow, or other approved material, as specified in 605.03.04(a), (b), and (c).
613.04 MEASUREMENT AND PAYMENT
The payment will be full compensation for all material, forms, reinforcement when specified, joints, sealer, compaction, curing, finishing, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
The removal and disposal of unsuitable material will be measured and paid for at the Contract unit price for Class 1-A Excavation, which includes the cost of using suitable excavation as replacement material.
When borrow, topsoil, or other selected backfill is specified, payment will be made at the Contract unit price for the respective items.
613.04.01 Excavation for driveways and entrances will be measured and paid for as specified in 201.04, except when existing driveways and entrances are removed, the cost of removal will be measured and paid for as specified in 206.04.02.
613.04.02 Asphalt Driveways and Entrances Milling will be measured and paid for per square yard as specified in 508.04.
613.04.03 Graded Aggregate Base Course will be measured and paid for as specified in 501.04.
613.04.04 Concrete Driveways and Entrances will be measured and paid for at the Contract unit price per square yard of finished surface including sidewalk ramps.
613.04.05 Asphalt Driveways and Entrances will be measured and paid for at the Contract unit price per ton for the mixture placed.
613.04.06 Turfgrass Establishment and Turfgrass Sod Establishment will be measured and paid for as specified in 709.04.