A.
Concrete.
Provide concrete in accordance with the applicable provisions of Section 03300, Cast-In-Place Concrete. Concrete pavement shall be “Normal Weight Structural Concrete” and shall have a minimum twenty-eight (28) day compressive strength of 3,500 pounds per square inch (psi) unless specifically designated otherwise on the plans.
B.
Reinforcing Steel and Related Materials.
Provide the following steel reinforcing items and related materials:
1.
Reinforcing Steel.
All steel reinforcing shall be open hearth, new billet steel manufactured in the United States and conforming to ASTM A615. All bars shall be Grade 60 with a minimum yield strength of 60,000 pounds per square inch (psi). Unless otherwise shown on the plans, all deformed steel reinforcing shall be #4 bars (minimum). All smooth steel reinforcing for doweling expansion and contraction joints shall be plain steel bars conforming to ASTM A-306, Grade 70, shop cut to length, straight, clean and free of rust, scale or other objectionable material.
2.
Supports for Reinforcing.
Supports for reinforcing bars shall be the correct type as intended and represented by the manufacturer. Bar supports shall be uniform high density polyethylene or fiberglass reinforced plastic and conform to CRSI Class 1, Maximum Protection. Concrete blocks or bricks will not be accepted.
3.
Tie Wire.
Use 18-gauge annealed steel for tie wire.
C.
Expansion Joints.
In addition to dowels, provide the following material for expansion joints:
1.
Joint Filler Material.
Filler material shall be preformed expansion joint filler of the bituminous type that conforms to the requirements of ASTM D1751. Unless otherwise shown on the plans, the thickness of the filler material shall be 3/4-inch.
2.
Joint Sealing Compound.
Joint sealing compound shall conform to the requirements of ASTM C-920, Type S, Grade P or NS. Color of sealant shall meet with the approval of the Engineer or the designated representative of the Engineer.
3.
Backer Rods and Backing Materials.
Provide a compressible type material such as closed-cell, resilient foam or sponge rubber stock of vinyl, butyl or neoprene, or expanded polyethylene or polyurethane. The diameter of the backer rod shall be at least twenty-five (25) percent larger than the joint reservoir and shall be capable of holding the fluid joint sealing compound in open joint in place. Backer rods shall be of such a type that it will not bond to the joint sealing compound.
4.
Sleeves.
Sleeves for expansion joints shall be 26-gauge steel or rigid PVC tubes which are capped at one end. Sleeves shall be in accordance with ASTM A120.
D.
Forms.
Provide metal or wooden forms to construct the concrete pavement. Wooden forms shall be of sound 2 × material of a depth equal to the required edge thickness of the pavement, free from warps, twists, loose knots, splits or other defects and constructed to provide a straight edge on the concrete. Metal forms shall be of an approved shape and section with a depth of the form equal to the edge depth of the pavement. The metal forms shall be free from warps, bends and kinks and shall be constructed to provide a straight edge on the concrete.
(Ordinance 2007-106, App. B, adopted 3/20/07)