524-1 Description.
Construct concrete pavement in the flow channel of drainage ditches and on slopes as shown on the Plans and in accordance with the Standard Plans .
524-2 Materials.
Concrete ................................ ................................ ..........Section 347 Preformed Expansion Joint Material and Hot Poured Sealer ............ ................................ ................................ ......................... Section 932 Filter Fabric * ................................ ................................ ...Section 985 Reinforcing Steel ................................ ............................ Section 415 *Use products listed on the Department’s Approved Product List (APL).
524-3 Forms.
Provide forms as specified in 520 -3.
524-4 Foundation.
Shape and compact the foundation materials, upon which the pavement is to be constructed, to a firm, even surface, true to grade and cross slope. Dispose of surplus material.
524-5 Joints and Weep Holes.
524-5.1 Joints:
524-5.1 1 Joints in Ditch Pavement: Construct formed (construction joint) or
tooled contraction joints, spaced at 25 feet maximum intervals. Open joints are prohibited. Construct expansion joints with 1/2 -inch preformed joint filler at all inlets, endwalls, and at intervals o f not more than 200 feet.
524-5.1 2 Joints in Slope Pavement: Form open or tooled (dummy) type joints
as shown in the Plans. Form open joints by staking a metal bulkhead in place and placing the concrete on both sides of it. When the concrete has set suf ficiently to preserve the width and shape of the joints, remove the bulkhead. Upon finishing the pavement over the joint, open and edge the slot with a tool having a 1/4 -inch radius.
524-5.2 Method of Placing Slope Pavement: Place slope pavement in vertic al strips,
4 feet, plus or minus 1 inch, wide, except taper radii strips from the 4 -foot width at the bottom to a minimum width of 1 foot at the top. Score the strips horizontally at intervals of 2 feet, plus or minus 1 inch, with a tool having a double 1/ 4-inch radius. Edge construction joints between strips with a tool having a 1/4 -inch radius. The Engineer will allow construction joints at horizontal scorings.
524-5.3 Weep Holes: Locate and construct weep holes as shown in the Plans. Construct
weep hole s at the toe of slope for all slope pavements.
524-5.4 Filter Fabric: Place filter fabric directly beneath all concrete ditch pavement for
the entire length and width of the pavement, regardless of the pavement thickness. Place filter fabric below weep ho le aggregate to form a mat continuous with the pavement filter fabric or underlapping the pavement filter fabric, if present. FY 2023-24 Return to Table of Contents
524-6 Placing Concrete.
Place the concrete in the forms, tamp and spade it to prevent honeycombing, and until the top of the structure can be floated smooth and the edges rounded.
524-7 Finishing.
Roughen the surface of ditch pavement after screeding concrete, unless otherwise specified, to the approximate shape and grade by a rake or other suitable tool drawn perpendicular to the direction of flow. Ensure that the furrows are at least 1/4 inch deep. Strike off slope pavement or smooth surfaced ditch pavement, when specified, true to line and cross slope and remove all surplus water and laitance from the surface. Lightly broom the finish.
524-8 Curing.
Cure the concrete as specified in 520 -8.
524-9 Method of Measurement.
524-9.1 Concrete Ditch and Slope Pavement: The quantities to be paid for Concrete
Ditch Pavement and Concrete Slope Pavement will be the plan quantity, in squ are yards, completed and accepted. Where the Plans show headers or cut -off walls at the end or edge of the pavement, the volume of the additional thickness of pavement that constitutes the headers, calculated in accordance with plan dimensions, will be con verted into equivalent square yards of standard thickness pavement and included in the quantity to be paid for. No deduction will be made for any areas occupied by manholes, inlets, or other drainage structures or by public utility appurtenances within th e pavement area. The square yard quantity includes any ditch blocks with ditch or slope pavement on top. When steel reinforcement is called for in the Plans, payment will be included in the square yard item. Sod will be measured and paid in accordance wit h Section 570.
524-9.2 Concrete Core Ditch Blocks: The quantity to be paid for Concrete Core Ditch
Blocks will be the plan quantity of concrete, in cubic yards, completed and accepted. When steel reinforcement is called for in the Plans, payment will be included in the cubic yard pay item. The cubic yard pay item includes any ditch block within a grass or earth ditch, without other pavement on top.
524-10 Basis of Payment.
Prices and payments will be full compensation for all work specified in this Section, including all earthwork, skimmers, and incidenta l materials necessary to complete the work. Payment will be made under: Item No. 524 - 1- Concrete Ditch Pavement - per square yard. Item No. 524 - 2- Concrete Slope Pavement - per square yard. Item No. 524 - 3- Concrete Core Ditch Block - per cubic yard. FY 2023-24 Return to Table of Contents SECTION 525 ASPHALT CONCRETE CURB
525-1 Description.
Construct an asphalt concrete curb on a previously laid pavement at the locations shown in the Plans.
525-2 Materials.
Use a Type SP-12.5 (Traffic Level B or C) asphalt concrete mixture.
525-3 Construction Methods.
Sufficiently roughen the surface of the roadway pavement at the locations where the curb will be constructed to provide suitable bonding of the pavement and the curb. Lay the curb by a machine or by other methods to provide the requ ired cross -section. The Engineer may allow variation in the Plan cross-section for using the particular machine, provided the Contractor obtains the equivalent cross -sectional area and the specified height of curb. Provide appropriate compaction as directe d by the Engineer.
525-4 Method of Measurement.
The quantity to be paid for will be the length plan quantity, in feet, completed and accepted. Any additions or deletions thereto as authorized by the Engineer will be determined by plan dimensions, station -to-station dimensions, final measurement, or any combination thereof, as measured along the face of the completed and accepted curb.
525-5 Basis of Payment.
Price and payment will be full compensation for all work specified in this Section, including all materials and incidentals necessary to complete the work. Payment will be made under: Item No. 525 - 1- Asphaltic Concrete Curb - per foot. FY 2023-24 Return to Table of Contents