2406Bridge Approach Panels

2406.1DESCRIPTION

This Work consists of constructing Bridge approach panels.

2406.2MATERIALS

A.1 Mix Designation ......................................................................................... Mix No. 3S52 C Curing Materials F Expansion Joint Seal ............................................................................................................... APL

2406.3CONSTRUCTION REQUIREMENTS

A Foundation Preparations Excavate, shape, and compact the foundation to a firm, uniform bearing surface in accordance with 2106, “Excavation and Embankment – Compacted Volume Method.” Construct Bridge approach panels to the section and grade shown on the Plans.

B Forms Provide forms made of non-reactive metal, wood, or other material capable of maintaining the concrete until the concrete can retain the molded shape. Provide forms with a height at least equal to the approach panel thickness of the formed concrete as shown in the P lans. Support the forms on the foundation to maintain the line and grade as shown on the Plans. On curves with a radius of 100 feet or less, use flexible or curved forms of the radius as shown on the Plans. Before placing the concrete, coat the contact surfaces of all forms with an approved form coating Material in accordance with 3902, “Form Coating Material.” Leave forms in place for at least 12 hours after placing the concrete unless otherwise approved by the Engineer. C Placing and Finishing Concrete Immediately before placing the concrete, thoroughly wet the foundation and forms. Place the concrete in a manner that will prevent segregation. Consolidate the concrete to fill voids using internal vibration. Strike off the concrete to the grade shown on the Plans, and float the surface smooth. Provide the same surface texture as the Bridge deck and construct in accordance with 2401, “Concrete Bridge Construction,” or 2404, “Concrete Wearing Course for Bridges.” Finish edges with a 3/8 inch radius edging tool. D Joint Construction Place joints as shown on the Plans. E Metal Reinforcement Provide and place metal reinforcement as shown on the Plans and in accordance with 2472, “Metal Reinforcement.” F Workmanship and Finish Ensure completed concrete Work is uniform in surface contour and texture and conforms to the lines and grades shown on the Plans. Finish the flow line surface of gutters as necessary to eliminate low spots and avoid entrapment of water. The Engineer will use a 10 feet straightedge to measure surface tolerance. The Department considers vertical deviations in the surface greater than 3/8 inch and line deviations greater than 1/2 inch from the required location as unacceptable Work in accordance with 1512, “Unacceptable and Unauthorized Work.” G Concrete Curing and Protection After completing final finishing operations, cure all exposed concrete surfaces. Use one of the following curing methods:

Compound,” within 30 minutes of concrete placement or once the bleed water has dissipated, unless the Engineer directs otherwise in accordance with 2406.3G.1.a , “Membrane Curing Method.” Place the membrane curing compound on the edges within 30 minutes after permanent removal of the forms or curing blanket, unless the Contract requires otherwise.

accordance with 2406.3G.1.b, “Blanket Curing Method,” as soon as practical without marring the surface. Whenever weather conditions are such as to cause unusual or adverse placing and finishing conditions, expedite the application of a curing method or temporarily suspend the mixing and placing operations, as the conditions require. If necessary to remove the coverings to saw joints or perform other required W ork, and if the Engineer approves, remove the covering for the minimum time required to complete that W ork. G.1 Curing Methods G.1.a Membrane Curing Method Before application, agitate the curing compound as received in the shipping container to obtain a homogenous mixture. Protect membrane curing compounds from freezing before application. Handle and apply the membrane curing compound in accordance with the manufacturer’s recommendations. G.1.a(1) Application Requirements Apply the curing compound with an approved airless spraying machine in accordance with the following:

area

opaque coverage on all exposed concrete surfaces (equal to a white sheet of copy paper) at the time of application. Some Department approved curing compounds may have a base color (i.e. yellow) that cannot comply with the above requirement. In this case, provide a uniform, solid, opaque consistency meeting the intent of the above requirement

period, immediately repair the damaged area by respraying G.1.a(2) Equipment Requirements The Engineer will approve the airless spraying machine for use if it is equipped with the following:

continuous agitation of the reservoir Material

variable spray patterns If the Engineer determines that the initial or corrective spraying results in unsatisfactory curing, the Engineer may require the Contractor to use the blanket curing method at no additional cost to the Department. G.1.b Blanket Curing Method After completion of the finishing operations and without marring the concrete, cover the concrete with completely saturated burlap curing blankets . Install in a manner

that envelops the exposed concrete and prevents loss of water vapor . After the concrete has cured, apply membrane curing compound to the concrete surfaces that will remain exposed in the completed Work. G.2 Protection Against Rain Protect the concrete from damage due to rain. Have available, near the site of the Work, Materials for protection of the edges and surface of concrete. Should any damage result, the Engineer will suspend operations until the Contractor takes corrective action and may subject the rain-damaged concrete to 1503, “Conformity with Contract Documents,” and 1512, “Unacceptable and Unauthorized Work.” G.3 Protection Against Cold Weather If the National Weather Service forecast for the construction area predicts air temperatures of 34°F or less within the next 24 hours and the Contractor wishes to place concrete, submit a cold weather protection Plan in accordance with 2406.3G.3.a, “Cold Weather Protection Plan.” Protect the concrete from damage, including freezing due to cold weather . Should any damage result, the Engineer will suspend operations until the Contractor takes corrective action and may subject the damaged concrete to 1503, “Conformity with Contract Documents,” and 1512, “Unacceptable and Unauthorized Work.” G.3.a Cold Weather Protection Plan Submit a written cold weather protection Plan to the Engineer for approval. The Plan shall include a proposed time schedule for concrete placement and curing, and Plans for adequately protecting the concrete during placement and curing. Do not place concrete until the Engineer approves the Contractor's cold weather protection P lan. H Backfill Construction and Opening Bridge Approach Panels to Traffic Cast the control specimens in accordance with 2461.3G.5, “Concrete Strength.” Cure the control specimens in the same manner and under the same conditions as the B ridge approach panel represented. The Engineer will test the control specimens in accordance with 2461.3G.5, “Concrete Strength.” Protect newly placed concrete from damage by adjacent vibratory or backfilling operations for a minimum of 24 hours. Resume vibratory and backfilling operations after the concrete has reached a minimum compressive strength of 2,000 psi or a flexural strength of 250 psi. The Contractor may use hand-operated concrete consolidation Equipment and walk behind vibratory plate compactors 24 hours after placing the concrete, and other Equipment as approved by the Engineer, in conjunction with the Concrete Engineer. The Contractor may also use rollers in “static” mode and fine grading machines. As soon as possible after the curing is complete and without subjecting the concrete W ork to damaging stresses, perform the backfill or embankment construction to the elevations shown on the Plans. If the Contract does require a specific backfill Material, use suitable grading Materials from the excavations in accordance with 2106, “Excavation and Embankment – Compacted Volume Method.” Place and compact the backfill Material in accordance with 2106, “Excavation and Embankment – Compacted Volume Method.” Dispose of surplus excavated Materials in accordance with 2106, “Excavation and Embankment – Compacted Volume Method.”

Do not open a Bridge approach panel to general public traffic or operate paving or other heavy Equipment on it for 7 Calendar Days, or until the concrete has reached a minimum flexural strength of 500 psi, or minimum compressive strength of 3,000 psi; whichever occurs first. Perform operations on new Bridge approach panels as approved by the Engineer and in accordance with the following:

damage to the pavement slab.

in accordance with 1513, “Restrictions on Movement and Storage of Heavy Loads and Equipment.” Sweep the Bridge approach panel surface free of debris prior to placing the protective Material or tracked Equipment onto the slab.

operate the Equipment wheels or tracks within 4 inches of the Bridge approach panel edge.

surface free of debris by sweeping or other method as approved by the Engineer to prevent spalling of the joints. If damage results from any of these operations, the Engineer will suspend all operations until the Contractor takes corrective action and the Engineer approves of a new method . The Engineer may subject damaged concrete to 1503, “Conformity with Contract Documents,” and 1512, “Unacceptable and Unauthorized Work.” I Expansion Joint Seal Select expansion joint Material from the APL, Bridge, “Expansion joint system.” Install Expansion Joint Seal in accordance with the Plans.

2406.4METHOD OF MEASUREMENT

If the Contract contains a Contract Item (or Contract Items) for the construction of Bridge approach panels, the Engineer will measure their construction as complete -in-place items. The Engineer will measure the total area of all panels of the same basic design. If the Contract does not contain this Contract Item, the Engineer will measure their construction under the relevant Contract Items provided for pavement construction. The Engineer will measure the length of expansion joints along the joint line as shown on the Plans.

2406.5BASIS OF PAYMENT

The cost of the following is included in the Contract Unit Price for Bridge approach panels:

The cost of constructing the joints complete in-place as shown on the Plans, including the providing and placing of all Materials such as filler, and sealer Material is included in the Contract Unit Price for Expansion joints, Design E5 or E8. A Monetary Adjustments The Department must apply Incentives and Disincentives and may apply monetary deductions for Bridge Approach Panels. The amounts of these adjustments are deemed reasonable.

A.1 Workmanship and Finish If the Engineer does not direct the removal and replacement of the unacceptable W ork, the Contractor may leave the Work in-place and the Engineer will calculate a monetary deduction of up to 50 percent of the Contract Unit Price for the unacceptable Work. A.2 Concrete Curing and Protection Failure to properly cure and protect the concrete in accordance with 2406.3G , “Concrete Curing and Protection,” will result in the Engineer calculating a monetary deduction in accordance with 1503, “Conformity with Contract Documents,” and 1512, “Unacceptable and Unauthorized Work.” If the Contract does not contain a separate Contract Item for Structural concrete, the Department may apply a monetary deduction of $50.00 per cubic yard or 50 percent of the Contractor-provided invoice amount for the concrete in question, whichever is less. B Schedule The Department will pay for concrete pavement on the basis of the following schedule: Item No. Item Unit

2406.503 Expansion Joints; Design E5 linear foot

3 Expansion Joints; Design E8 linear foot

4 Bridge Approach Panels square yard