562.01 Description
This work involves Class A and B deck repair as specified in the contract or identified by the Project Manager.
A.Class A Repair. Areas of removal and replacement of existing unsound deck concrete, no deeper than the top of the bottom mat of reinforcing steel.
B.Class B Repair. Areas of removal and replacement of existing unsound concrete full depth through the slab.
562.02 Materials
Use Class Structure or Deck concrete for Class A and B repair unless otherwise approved. Obtain the Project Manager’s approval before using rapid-setting concrete or polymeric concrete.
562.02.1 Reinforcing Steel
Furnish all reinforcing steel in accordance with Section 555 and Subsection 711.01.
562.03 Construction Requirements
562.03.1 Submittals
Submit for review the following:
1.Any proposed rapid set or polymeric concrete product data sheets.
2.Description of deck preparation measures that will be used to promote a competent bond between existing and new concrete.
3.The method and materials used to contain, collect, and dispose of all debris generated by the removal, cleaning, and surface preparation process.
562.03.2 Equipment
Provide equipment in accordance with the following requirements:
1.Power-driven hand tools for removal of concrete with the following limitations:
a.Jackhammers of a nominal 30-pound (14 kg) class or smaller.
b.Operate jackhammers or other mechanical chipping tools at an angle of 45° or less from the deck surface.
c.To remove concrete from beneath a reinforcing bar in a Class A repair, use chipping hammers in a nominal 15-pound (7 kg) class or smaller.
2.Hand tools such as hammers and chisels for removing final particles of unsound concrete and to achieve final required depth.
562.03.3 Location and Inspection of Repair Areas.
1.Complete milling operations, if included in the contract, prior to the locating of Class A or B repair areas
2.Use compressed air to dry the deck and to blow it clean of debris. The Project Manager will then locate and mark areas of Class A and Class B deck repair.
3.Notify the Project Manager if repair work reveals areas which differ from the marked areas.
4.If the Project Manager determines that an area of Class A repair or bridge deck milling has exposed more than minimal amounts of the bottom mat of reinforcing steel, the 562 – BRIDGE DECK REPAIR 2020 EDITION V5.1 562-2 Project Manager may require Class B repair in that area. Do not perform Class B repair without prior approval.
562.03.4 Concrete Removal
1.For un-milled surfaces, first saw cut ½-inch (13 mm) deep around all Class A and B repair area edges.
2.Remove all delaminated, cracked, disintegrated, loose, or otherwise unsound concrete using mechanical equipment. Finish the removal with lightweight hand tools. Prevent cutting, stretching, or other damage to exposed reinforcing steel.
3.If the Project Manager finds an excessive amount of unsound concrete while performing a final check on a removal area, rework that entire area.
4.The Project Manager may approve the use of high-pressure water-blast equipment for concrete removal. The Project Manager will suspend the use of such equipment at any time if the process produces unsatisfactory results.
562.03.5 Reinforcing Steel
If an existing reinforcing bar has less than 1-inch (25 mm) clearance from the newly finished concrete surface, remove concrete from under the bar, then press it down and fasten it in place to provide 1-inch (25 mm) clearance. Replace any reinforcement bar that is corroded, cut, or damaged to the point that it has lost 25% or more of its effective cross-sectional area. Replace such bars with new ones of the same size. The Project Manager will determine splice locations where bars need cutting and splicing. Repair epoxy coating that is damaged on reinforcing bars during concrete removal operations. Prior to placing new concrete, remove all rust, dirt, laitance, oil, or other foreign materials from reinforcement surfaces.
562.03.6 Placing and Finishing Concrete - Class A and B Repair
A.Repair.
1.Prepare the surface as necessary in order to ensure a competent bond between the existing and repair concrete.
2.Use forms for new concrete in Class B repair areas. Do not attach forms to existing reinforcing bars unless approved by the Project Manager.
3.Repair concrete may be placed concurrently with an overlay if approved by the Project Manager. Provide a description of the proposed sequence and equipment to be used to place and consolidate the repair concrete ahead of the screed.
4.If repair concrete is not placed concurrently with an overlay, finish and cure the repair concrete as follows:
a.If the repair concrete will not be the final grade, provide roughened surfaces to a full amplitude of 0.25-inch (6 mm).
b.If the repair concrete will be the final grade, provide broom finish.
c.Cover the repair concrete with a single layer of clean, wet burlap immediately after completion of surface finishing.
d.Place a minimum 4 mil polyethylene film over the burlap.
e.For rapid-setting and polymeric concretes, cure according to manufacturer’s recommendations. For other concrete, maintain the wet cure for a minimum of 72 hours.
B.Acceptance. 2020 EDITION V5.1 BRIDGE DECK REPAIR – 562 562-3
1.Surface Smoothness will be checked in accordance with Subsection 552.03.11(B)(6). Correct areas identified by the Project Manager. Correct variations that prevent drainage from any part of the bridge deck.
2.A drag-chain survey will be conducted to determine the soundness of bond between the repair and the deck, placing emphasis on areas of visible cracking. Remove and replace areas that have debonded. The Project Manager may core the repair to determine depth of cracking. When directed by the project manager, seal cracks in repair concrete with a bridge deck crack sealant listed on the QPL . Apply the product in accordance with the manufacturer’s recommendations. In cases of excessive cracking, the Project Manager may require removal and replacement of part of or all of a repair.
3.All corrective actions, including crack sealing are at Contractor expense.
562.04 Method of Measurement
Class A bridge deck repair and Class B bridge deck repair are measured by the square yard of deck surface and includes the repair concrete. Areas of concrete removed by milling operations, even if deeper than plan, are not measured for payment in accordance with Class A bridge deck repair. Areas of concrete removed by milling operations, which then require additional Class A or B repair, as determined by the Project Manager, are measured for payment. When an area of Class A bridge deck repair is upgraded to Class B bridge deck repair, the area will be measured as Class B bridge deck repair. Replacement of reinforcing bars will be measured and paid for in accordance with Subsection 109.04.1 . Replace any reinforcing bars damaged by Contractor operations at Contractor expense. When not located in an area of Class A or B repair, work necessary to provide reinforcement clearance in accordance with Subsection 562.03.5 will be measured and paid for in accordance with Subsection 109.04.
562.05 Basis of Payment
Payment for the completed and accepted quantities is made under the following: Pay Item Pay Unit Class A Bridge Deck Repair Square Yard (m2) Class B Bridge Deck Repair Square Yard (m2)
Referenced in this section
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Source: Standard Specifications for Road and Bridge Construction, 2020 (v5.1) Edition. Pages 385–388 of 611. View official source ↗