A. 
General.
In addition to any instructions specified herein, the preparations detailed in Section 03300, Cast-In-Place Concrete, paragraph 3.01, shall also apply here as if written in their entirety. This includes, but is not limited to, the minimum twenty-four (24) hour notification that shall be given to the Engineer or the designated representative of the Engineer before any concrete is placed.
B. 
Subgrade Preparation and Protection.
Excavate, prepare, shape, and compact the subgrade to the grades and densities shown on the plans and in accordance with Section 02223, Excavating, Backfilling, and Compacting for Pavement. Subgrade shall be wetted sufficiently to minimize moisture loss from the concrete to the subgrade. Water puddles or muddy areas will not be allowed. Maintain the subgrade in a smooth, compacted condition at the proper grades until the concrete has been placed. No ready mix trucks or other equipment shall be allowed to operate within the forms unless clearance or other job conditions will not allow operation from outside the forms. If trucks must operate between the forms, the subgrade shall be protected from damage by use of runways. Any ruts or irregularities in the subgrade caused by equipment or by trucking material shall be corrected by second rolling or hand tamping.
(Ordinance 2007-106, App. B, adopted 3/20/07)
A. 
Placing of Reinforcing Steel.
Reinforcing steel to be used in the construction of concrete pavement shall be placed in accordance with the plan details. Unless otherwise shown on the plans, reinforcing shall be #4 deformed bars spaced eighteen (18) inches center to center; installed in a criss-cross pattern such that the longitudinal steel is parallel and the transverse steel is perpendicular to the centerline of the pavement section; and have twelve (12) inch lap splices when joining two (2) individual lengths of rebar together. Lap splices in adjacent bars shall be staggered such that splices do not occur in the same location in adjacent bars and, where possible, use full length reinforcing steel for executing the work. Steel reinforcing bars shall be tied together at all points of intersection with the specified tie wire and be securely held in place with bar supports (chairs), or other approved methods, during the placement of the concrete.
B. 
Placement of Concrete.
Place concrete for the construction of concrete pavement in accordance with the applicable provisions for “Normal Weight Structural Concrete” outlined in Section 03300, Cast-In-Place Concrete.
C. 
Concrete Pavement Finish.
The pavement shall be struck-off and consolidated with mechanical finishing machines or by hand-finishing methods. Associated concrete curbs shall be given the same finish as the concrete pavement.
1. 
Mechanical Finishing.
When mechanical finishing machines are used for finishing, the concrete shall be struck-off at such a height that after consolidation and final finishing, it shall be at the exact elevation as shown on the plans. The mechanical finishing machines shall consist of a power driven transverse finishing machine and a longitudinal finishing machine. Finishing machines shall be equipped with rubber tires for rolling on concrete pavement. The transverse finishing machine shall be provided with two (2) screeds that are accurately adjusted to the pavement slope or crown as indicated on the plans. The transverse finishing machine shall ride on the forms and be so designed and operated as to strike off and consolidate the concrete. The Contractor shall make at least two (2) trips over the pavement area with the transverse finisher but, shall make as many trips over the pavement area as required to obtain the required grades. The longitudinal finishing machine shall ride on the forms and be equipped with a longitudinal float not less than ten (10) feet in length. The machine shall be so designed and operated as to finish the pavement to the grades and elevations shown on the plans. Just before the concrete becomes non-plastic, the pavement surface shall be belted with a canvas belt with a width between six (6) and ten (10) inches wide and a length at least two (2) feet longer than the pavement width. The belt shall be moved with short strokes transversely across the pavement and advanced rapidly in the longitudinal direction to produce a gritty, textured surface.
2. 
Hand Finishing.
When the pavement is finished by hand, the concrete shall be struck-off with a screed of an approved cross section and a length at least two (2) feet longer than the pavement width. The strike-off screed shall be moved forward with combined transverse and longitudinal motion in the direction the work is progressing, maintaining the screed in contact with the forms and keeping a slight excess of material in front of the cutting edge. The concrete shall then be tamped with an approved tamping template to thoroughly compact it and eliminate surface voids. The surface shall then be screeded to the required section. After completion of the strike-off, tamping and transverse screeding, a longitudinal float shall be operated to level the surface to the required grade. Just before the concrete becomes non-plastic, the surface shall be belted with a canvas belt as described in the preceding subparagraph to produce a gritty, textured surface.
D. 
Curing of Concrete.
All concrete pavement shall be cured for a period of not less than seventy-two (72) hours. Curing of all exposed concrete surfaces shall begin immediately after the completion of the finishing operations. The following are acceptable methods for curing concrete:
1. 
Polyethylene Film Curing.
After completion of the finishing and after initial set of the concrete, apply a fine spray of water to the concrete and cover it with a polyethylene film. Place and secure polyethylene film in direct contact with the concrete surface such that an airtight seal is maintained for the entire duration of the specified curing time. Contractor is responsible for preventing and repairing any damage to the polyethylene film during the entire curing time. The polyethylene film blankets are subject to the approval of the Engineer or the designated representative of the Engineer. The film blankets shall be rejected at any time when, in the opinion of the Engineer or the designated representative of the Engineer, the required airtight seal is not maintained.
2. 
Curing Compound.
After completion of the finishing operations and the disappearance of the free surface moisture, uniformly spray the concrete surface with an approved curing compound. The curing compound membrane shall be applied in accordance with the manufacturer’s instructions. If water drops do not bead or water soaks into concrete after application of the curing compound, a full additional coat of compound shall be applied. Contractor is responsible for preventing and repairing any damage to the curing compound membrane during the entire duration of the specified curing time.
E. 
Joints.
All joints shall be of the types shown and at the location and spacing indicated on the plans. All joints shall be constructed true to line with their faces perpendicular to the pavement. Transverse joints shall be at right angles to the centerline of the pavement and shall extend the full width of the slab. Longitudinal joints shall be installed parallel to the centerline of the pavement. Transverse joints in succeeding lanes shall be placed in line with similar joints in the existing pavement. All joints shall be so prepared, finished and cut to provide a groove of sufficient width and depth to receive and retain joint sealing material.
1. 
Construction Joints.
Transverse construction joints of the types shown on the plans shall be placed wherever the placing of concrete is suspended for a period of more than thirty (30) minutes. These transverse joints, when planned, shall be placed at either an expansion joint or at a contraction joint. The joint shall not be allowed within eight (8) feet of a regularly spaced transverse joint. If the pouring of concrete is stopped and a joint is required in these limits, then it shall not be installed and the fresh concrete shall be removed back to the previously spaced regular joint. Dowel assemblies or other approved load transfer devices shall be installed at the joint as required by the plans. Longitudinal construction joints necessary for lane construction shall be of the dimensions and type shown on the plans. These joints shall be either a keyed joint or a butt type joint with dowels. The keyed joint shall be formed by placing a deformed metal plate against the form when the first lane adjacent to the joint is placed. This plate is to be removed with the forms. The edge of the joint shall be finished with an edging or grooving tool and a slot, of the dimensions indicated, shall be formed to receive joint sealing material.
2. 
Expansion Joints.
Transverse and longitudinal expansion joints shall be installed at the location and spacing as shown on the plans and shall be installed and finished to insure complete separation of the slabs. The expansion joint material shall be of the preformed type conforming to these specifications. If joints are to be equipped with dowels, they shall be at the spacing and location indicated on the plans. They shall be firmly supported in place, accurately aligned parallel to the pavement grade and the centerline of the pavement by means of dowel support which will remain in the pavement and will insure that the dowels are not displaced during construction. One-half of each dowel shall be painted with rust preventative paint and greased with an approved lubricant and, in expansion joints, shall be equipped with the specified tight fitting 26-gauge steel or PVC sleeve. The sleeve shall provide for an unobstructed expansion space of one (1) inch to permit dowel movement. The closed end of the sleeve shall be watertight. In the construction of transverse joints in pavement with integral curbs, special care shall be taken to see that all transverse joints extend continuously through the pavement curb. When dowels are not specified, the thickness of the concrete at these joints shall be increased by at least twenty-five (25) percent of the normal pavement thickness to the nearest inch, but not more than two (2) inches. This increased thickness shall slope to the normal pavement thickness in not less than five (5) feet from the joint or to the nearest joint. Following the placement of the concrete, all excess concrete shall be cleaned from the top of the expansion joint material, and before opening to traffic, this space shall be swept clean and filled with a joint sealing compound as specified herein. Following the removal of the forms, any concrete bridging the joint space at the ends shall be removed.
3. 
Contraction Joints.
Transverse contraction joints shall be of the sawed or formed dummy groove type and shall be at the locations and spacing and of the dimensions shown on the plans. The joints shall consist of a groove in the top of the slab sawed in the hardened concrete or formed in plastic concrete. When sawed, the groove shall be straight, of a uniform width and depth, and shall be sawed as soon as possible after the placement of the concrete to prevent contraction cracks in the slab. When formed, the groove shall be true to line and shall be uniform in width and depth. The sides of the groove shall be finished even and smooth with an edging tool. Reinforcing steel shall be continued through all contraction joints. Dummy groove contraction joints shall extend vertically downward 1/4 of the slab depth from the surface and prior to opening for traffic shall be cleaned and filled with the specified joint sealing material. Longitudinal contraction joints shall be of the deformed metal strip type located in accordance with plan details.
F. 
Opening to Traffic.
The Contractor shall erect and maintain barricades to keep public and construction traffic from traveling on the newly placed concrete pavement. All barricades are subject to the approval of the Engineer or the designated representative of the Engineer. Prior to allowing traffic on the pavement, all joints shall first be sealed, the pavement cleaned, and earth placed against the pavement edges. If approved by the Engineer or the designated representative of the Engineer, traffic will be allowed on the pavement after the concrete has been in place for ten (10) days, but will be limited to vehicles with a gross weight of 14,000 pounds or less. After fourteen (14) days, if approved by the Engineer or the designated representative of the Engineer, the pavement shall be opened to all traffic except any equipment not licensed for operation on public highways. The opening of the pavement to traffic shall in no way relieve the Contractor from his responsibilities for the work as stated in the Contract and any Conditions thereto.
(Ordinance 2007-106, App. B, adopted 3/20/07)
Contractor shall repair any pavement that does not meet the specified thickness.
(Ordinance 2007-106, App. B, adopted 3/20/07)
A. 
General.
Field quality control shall be in accordance with the applicable provision of Section 03300, Cast-In-Place Concrete, and any other provisions specified herein.
B. 
Cores.
The thickness of the completed pavement will be determined prior to final acceptance by the measurement of cores taken at such points as the Engineer or the designated representative of the Engineer may select. These cores, if taken, shall be at the rate of at least one (1) core for each five-hundred (500) square yards of pavement.
(Ordinance 2007-106, App. B, adopted 3/20/07)