REPAIR OF CONCRETE BRIDGE DECKS 513.02 433 512.05 METHOD OF MEASUREMEN T — VACANT
512.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.PAINTING EXISTING STRUCTURES Lump Sum
B.COLLECTION AND HANDLING OF WASTE Lump Sum
C.PENTRATING SEALER FOR TREATING PACK RUST Each For new structural steel, include the cost of cleaning, painting, caulking, enclosures, and related work to be included in the contract unit price for the relevant structural steel pay item. The Department will pay for the painting of existing steel structures as Painting Existing Structures , unless otherwise required by the Contract. The Department will consider the cost of painting, caulking, enclosures, providing access, and related work to be included in the contract unit price for Painting Existing Structures . The Department requires paint material certifications for final payment. The Department will consider the cost of cleaning, containment, stabilization, in cineration, transportation and disposal of waste, sampling and testing of soil, air, and waste materials, permits, related work, and submission of required documentation to be included in the contract unit price for Collection and Handling of Waste . Item P enetrating Sealer Pack Rust Repair for each location treated to include all labor, materials, and equipment required for surface preparation, additives for chloride removal, and other items as necessary to address pack rust or crevice corrosion.
513.01 Description
This work consists of patching decks, repairing decks, or both.
513.02 Materials
Provide materials in accordance with the following sections and s ubsection: Material: Section or Subsection: Portland Cement Concrete 701 Reinforcing Steel 511 Early Strength Concrete (ESC) for Bridge Deck Patching and Overlays 701.2
513.04 Repair of Concrete Bridge Decks
434 513.03 EQUIPMENT Protect the deck from oil or other harmful material by providing equipment with traps, filters, drip-pans, or other devices. Use the following types of surface preparation equipment as required by the Contract and as directed by the Engineer:
A.Hand -Held Blast Cleaning Equipment Provide hand -held blast equipment for sand -blasting or water -blasting to expose fine and c oarse aggregates. Provide water -blasting equipment that delivers at least 25 gpm [95 L/min] at 4,000 psi [28 Mpa].
B.Sawing Equipment Provide saws capable of cutting concrete to depth required by the Contract.
C.Power -Driven Hand Tools Provide power -driven hand tools, jack hammers, and chipping hammers that weigh no more than a nominal 15 lb [7 kg].
D.Proportioning and Mixing Equipment Provide proportioning and mixing equipment in accordance with Subsection 414.03, “Equipment” for high density concrete. Provide a rotating -paddle type construction or stationary concrete mixer. Alternatively, use a continuous mixer in conjunction with volumetric proportioning.
E.Finishing Equipment Provide a vibrating screed to fini sh the deck surface. For small patches where a vibrating screed is impractical use hand tools to vibrate, strike -off, and leave a rough finish.
F.Lighting Equipment Provide lighting for night work in accordance with Subsection 509.4.C(3)(c), “Lighting.”
G.Pachometer Provide a pachometer that can determine that depth, size, and spacing of reinforcing steel.
513.04 Construction Methods
A.General Use engineering controls to limit dust in accordance with Section 509, “Structural Concrete. ” Limit the maximum concrete temperature to 85 °F [30 °C]. During bridge deck concrete removal, protect traffic under the bridge and adjacent to the work zone. REPAIR OF CONCRETE BRIDGE DECKS 513.04 435 B. Work Plan Submit a work plan t o the Engineer and allow 14 days for review before starting work. Include descriptions of the following: Material, Equipment, Procedures for placing and removing patches, Forms, Labor requirements, and Anticipated work schedule, including: Traffic control , Project phasing, Patching cure times, Surface preparation, and Estimated placement time. Begin work after approval of the work plan.
C.Deck Repairs and Patching
1.General Remove existing overlays, asphalt, unsound concrete, and foreign materials from the surface. Use a chain drag, or other Engineer approved method, to locate delaminations in the bridge deck. Before removal, obtain the Engineer’s approval for deck removal areas. Remove unsound concrete using equipment in accordance with Subsection 513.03.A, "Hand -Held Blast Cleaning Equipment," and Subsection 513.03.C, "Power -Driven Hand Tools. " Operate jack hammers at angles 45° or less from horizontal.
2.Materials Add fibers if appr oved as part of the mix design.
3.Patch Preparation Use a pachometer or provide measurements where reinforcing steel is exposed to locate the depth of existing reinforcing steel before making saw cuts. Provide a saw -cut vertical edge aroun d the perimeter of the repair areas. When the depth of the reinforcing steel is less than 1 in [25 mm], extend the cut to just above the top of the existing reinforcing steel. For depths of reinforcing steel that are greater than 1 in [25 mm], make the s aw cut at least 1 in [25 mm] deep, measure from the original deck surface. Do not create patches with re -entrant corners. See Figure 513:1 for acceptable and unacceptable patch geometries. Ensure the dimensions of a 45° re-entrant corner equal at least 4 in [100mm]. Do not cut, stretch, or damage exposed reinforcing steel. Blast exposed reinforcing steel clean. Replace or repair damaged reinforcing steel, lapping new and old reinforcing as required by the Contract. Splice corrosion damaged exposed re inforcing steel if more than 20 percent of the area of the reinforcing steel section has been lost.
513.04 Repair of Concrete Bridge Decks
436 Figure 513:1 Acceptability of Patch Geometry Acceptable Unacceptable Acceptable
D.Deck Patch Classification
1.Class A Bridge Deck Repair Class A bridge deck repairs consist of the following: Removing unsound concrete to the top mat of reinforcing steel by chipping with power hand tools in accordance with Subsection 513.03, “Equipment;” Disposing of removed conc rete; Replacing the removed concrete with high density concrete, latex modified concrete, VES I concrete, VES III concrete, or RSLMC; or Class AA Concrete when allowed in the plans; Notifying the Engineer before removing concrete below the top mat of reinf orcing steel.
2.Class B Bridge Deck Repair Class B bridge deck repairs consist of the following: Removing unsound concrete from below the top mat of reinforcing steel and from above the bottom mat of reinforcing steel by chipping with hand tools in accor dance with Subsection 513.03, “Equipment;” Cleaning concrete off the top reinforcing steel mat in the repair area; Disposing of removed concrete; Replacing the removed concrete with high density concrete, latex modified concrete, VES I concrete, VES III concrete, RSLMC, or Class AA concrete when allowed in the plans; and Notifying the Engineer before removing concrete below the mid -depth level. Remove concrete at least 1 in [25 mm] below the top mat of reinforcing steel .
3.Class C Bridge Deck Repair Class C bridge deck repairs consist of the following: Removing unsound concrete for the full depth of the deck leaving the reinforcing steel intact; Extending the removal to the full depth when removal of unsound concrete reaches the bottom mat of reinforcing steel; REPAIR OF CONCRETE BRIDGE DECKS 513.04 437 Providing forms in accordance with Section 502, “Forms, Falsework, and Temporary Works,” to place new concrete in the full -depth opening. For areas of at least 1 yd² [1 m²], support f orms from the existing superstructure. For smaller areas, use wire tires to suspend the forms from existing reinforcing bars. Remove forms after completion. Show typical forming details in the work plan submitted to the Engineer; Cleaning existing concr ete from reinforcing steel mats in the repair area; Disposing of removed concrete; and Replacing the removed volume of concrete with Class AA concrete or Engineer approved rapid setting concrete.
E.Cold Weather Practices Implement cold weather practices i n one or more of the following conditions: The air temperature was less than 55 °F [13 °C] within 24 hr of placement. The air temperature will be less than 55 °F [13 °C] within 6 hr of placement. The substrate temperature is less than 55 °F [13 °C] during placement. Perform cold weather practices as follows: Maintain a concrete mix temperature of at least 75 °F [24 °C] during placement. Complete placement during the warmest part of the day. Ensure rising air temperature during placement. Place early streng th concrete at air and deck temperatures greater than 45 °F [7 °C].
F.Mixing
1.Class AA and High Density Concrete Provide equipment in accordance with Subsection 414.03, “Equipment.” Batch and mix concrete in accord ance with Subsection 414.04.B, “Handling, Measuring, and Batching Materials” and Subsection 414.04.C, “Mixing Concrete .“
2.Latex Modified Concrete Proportion and mix latex mo dified concrete materials in accordance with the following:
a.Measurement of Materials Proportion materials for the mixture with a mobile continuous mixer. Calibrate the proportioning equipment for each material in the presence of the Engineer. Always operate the proportioning equipment at the equipment manufacturer’s recommended speed. Check and verify yields.
b.Mixing of Materials Mix materials in accordance with the equipment manufacturer’s recommendations. Ensure the mixture is uniform in compos ition and consistency. Proceed with finishing operations steadily, completing the final finishing before a plastic surface film forms.
513.04 Repair of Concrete Bridge Decks
438 G. Placing Clean and dry the repair area before placing the patch. In a continuous operation, place Type AA, VES I, VE S III, or RSLMC in the prepared area. Consolidate the repair concrete using a vibrating screed. For patch areas with a thickness of at least 3 in [75 mm], internally vibrate the fresh concrete. Provide a rough finished texture on repair areas for which the Contract requires an overlay. Where not placing an overlay, place concrete to the existing deck level and match the surface texture of the repair with the existing deck. Within 15 min of placing the patch, cover with insulating blankets that have an R value of at least 5. Continuously weigh down the blanket edges to prevent wind from blowing under the blanket. Maintain insulating blankets until the concrete reaches compressive strength or at least 24 hr, whichever is less. Provide insulating blanke ts year round.
H.Curing
1.Overlay Substrate Patching Water cure repairs in accordance with Subsection 509.04.F(3), “Water Method,” for 7 days or until overlay placement. Do not use curing compound if placing ove rlay.
2.Surface Patching Water cure repairs in accordance with Subsection 504.04.D(5) , "Fogging and Curing Requirements ,” for 7 days. If opening a deck surface to traffic in less than 7 days, cure patches using Class AA concrete for at least 24 hr and patches using VES I, VES III, and RSLMC, until the patch reaches the strength required by the Contract. Additionally, cure all repair classes in accordance with Subsection 504.04D(5) , "Fogging and Curing Requirements." Do not use curing compound if placing overlay.
I.Straightedge Testing and Surface Tolerance Perform straightedge test ing in accordance with Subsection 414.04.I(5), “Straightedge Testing and Surface Correction.” After floating and removing excess water, and while the concrete is still plastic, use a 10 ft [3 mm] straightedge to te st the smoothness of the concrete surface. Lay the straightedge on the repaired pavement parallel to the centerline. Ensure the surface does not vary more than ⅛ in [3 mm] from the lower edge of the straightedge. Ensure the transverse slope of the pavem ent does not have depressions greater than ⅛ in [3 mm] when tested with the 10 ft [3 m] straightedge extending from edge to edge in a traffic lane transverse to the centerline. After curing, retest the surface and grind areas higher than ⅛ in [3 mm] above the straightedge bottom. Groove the ground surfaces to have a texture equal to the surrounding surfaces.
J.Limitation of Operations Keep traffic off the finished surface during the curing period required by the Contract. The Department will not allow preparation work in areas adjacent to or adjoining new concrete during the curing period required by the Contract. DRIVEN FOUNDATION PILES 514.02 439 513.05 METHOD OF MEASUREMEN T The Engineer will measure classes of bridge deck repair before concrete placement. The Engineer will not measu re reinforcing steel used to repair existing steel with heavy deck section loss.
513.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.CLASS A BRIDGE DECK REPAIR Square Yard [Square Meter]
B.CLASS B BRIDGE DECK REPAIR Square Yard [Square Meter]
C.CLASS C BRIDGE DECK REPAIR Square Yard [Square Meter] The Department will consider the concrete material, cost of reinforcing steel, sawing, removals, lighting and other incidental items to be included in the contract unit price for Class A Bridge Deck Repairs , Class B Bridge Deck Repairs , and Class C Bridge Deck Repairs . Class A Bridge Deck Repairs and Class B Bridge Deck Repairs will not be measured for payment when Hydrodemolition is used. SECTION 514 DRIVEN FOUNDATION PILES
514.01 Description
This work consists of providing and driving piles and cutting off or building up foundation piles of the type and dimensions required by the Contract. This work also includes providing test piles, performing load tests, and providing and placing reinforcing steel, c oncrete -filled steel shell piles, and pipe piles. The Department defines piles as steel H -piles, sheet piles, steel shell piles, or precast concrete piles.
514.02 Materials
A.General Provide materials in accordance with the following sections and subsecti on: Material: Section or Subsection Structural Concrete 509 Reinforcing Steel for Structures 511 Structural Steel 724 Steel Castings 725.02
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 447–452 of 935.