3302Dowel Bars

3302.1SCOPE

Provide dowel bars for use in Portland cement concrete pavements and other concrete applications as shown on the Plans.

3302.2REQUIREMENTS

Provide dowel bars meeting the requirements of epoxy coated steel dowel bars or galvanized tubular dowel bars. A Epoxy Coated Steel Dowel Bars Provide Grade 40 or Grade 60 steel dowel bars meeting the requirements of AASHTO M 31 Standard Specification for Deformed and Plain Carbon and Low-Alloy Steel Bars for Concrete Reinforcement. Epoxy coat the steel dowel bars in accordance with AASHTO M254 Standard Specification for Corrosion-Resistant Coated Dowel Bars, and as modified:

another organization approved by the Materials Engineer.

If cutting dowel bars to length by shearing, immediately repair damaged coating and verify dowel bars have not exceeded the maximum deformation limits. Ensure that sheared dowel bars are not more than 0.04 inches out of round, and that such damage does not extend more than 0.40 inches from the end of the bar. B Alternate Dowel Bars Use alternate dowel bar Materials as allowed or required by the Contract.

C Bond Breaker Material Provide bond breaker Material listed on the APL. Prior to delivery to the Project Site, coat the entire dowel bar assembly or dowel bar bundle with a bond breaker Material in accordance with the Manufacturer’s recommendations. D Certification of Dowel Bars Ensure the manufacturer’s plant Quality Control office maintains documentation containing the data required by certification, including test data and measurements taken at times and locations as required by the CRSI, the Materials Engineer, or both. Include the following standardized statement with delivery invoices: “ (insert company name) certifies that the dowel bars and dowel basket assemblies are coated with a bond breaker Material and meet the requirement of 3302,”Dowel Bars” E Storage and Protection of Dowel Bars Do not store dowel bars in a manner that will cause, induce, or accelerate corrosion or contamination of the metal at any time. Locate timbers (dunnage) on the ground to support the bundles and keep them free of contamination. Protect coated dowel bars before handling or shipping to prevent damage to the coating . Pad bundling bands and lift bundles using an OSHA-approved spreader bar, multiple supports, or platform Bridge to prevent bar to bar abrasion from sags in the bar bundle. Do not drag or drop bars or bundles. Support bars or bundles in transit to prevent damage to the coating. Store Materials at the Project Site to allow the Engineer to visually inspect and check the various types of reinforcement for conformance to the dimensions as shown on the P lans. Store bars of the same type together. Identify dowel bars with tags bearing the identification symbols as shown on the P lans. If the epoxy-coated steel is incorporated into the Project and is exposed to the weather or stored exposed to the weather for more than 60 Calendar Days, cover the steel to protect the Material from sunlight, salt-spray, and weather exposure. Provide for air circulation around the covered steel to minimize condensation under the protective covering.

3302.3SAMPLING AND TESTING

Sample and test dowel bars and dowel basket assemblies in accordance with the Schedule of Materials Control. The Department will visually inspect the bond breaker Material coating on the dowel bars.