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9/2/2020 <br /> <br />32 13 13 CONCRETE PAVING Page 8 of 12 <br />1. Continue steel reinforcement across construction joints unless otherwise indicated. Do not <br />continue reinforcement through sides of paving strips unless otherwise indicated. <br />2. Provide tie bars at sides of paving strips where indicated. <br />3. Butt Joints: Use bonding agent at joint locations where fresh concrete is placed against <br />hardened or partially hardened concrete surfaces. <br />4. Keyed Joints: Provide preformed keyway-section forms or bulkhead forms with keys <br />unless otherwise indicated. Embed keys at least 1-1/2 inchesinto concrete. <br />5. Doweled Joints: Install dowel bars or plates and support assemblies at joints where <br />indicated. Lubricate or coat with asphalt one-half of the dowel length to prevent concrete <br />bonding to one side of the joint. <br />C. Isolation Joints: Form isolation joints of preformed joint-filler strips abutting concrete curbs, <br />catch basins, manholes, inlets, structures, other fixed objects, and where indicated. <br />1. Locate expansion joints at intervals of 50 feet unless otherwise indicated. <br />2. Extend joint fillers full width and depth of joint. <br />3. Terminate joint filler not less than 1/2 inchor more than 1 inchbelow finished surface if <br />joint sealant is indicated. <br />4. Place top of joint filler flush with finished concrete surface if joint sealant is not indicated. <br />5. Furnish joint fillers in one-piece lengths. Where more than one length is required, lace or <br />clip joint-filler sections together. <br />6. During concrete placement, protect top edge of joint filler with metal, plastic, or other <br />temporary preformed cap. Remove protective cap after concrete has been placed on both <br />sides of joint. <br />D. Contraction Joints: Form weakened-plane contraction joints, sectioning concrete into areas as <br />indicated. Construct contraction joints for a depth equal to at least one-fourth of the concrete <br />thickness, as follows or every 10 feet. <br />1. Saw Joints: Form contraction joints with a power saw equipped with a shatterproof abrasive <br />or diamond-rimmed blade. Cut 1/8 inch wide joint into concrete when cutting action will <br />not tear , abrade, or otherwise damage surface and before developing random contraction <br />cracks. <br />a. Tolerance: Ensure that sawed joints are within 3 inches either way form centers of <br />dowels. <br />E. Edging: After initial floating, tool edges of paving, gutters, curbs, and joints in concrete with an <br />edging tool to a 3/8-inch radius. Repeat tooling of edges after applying surface finishes. Eliminate <br />edging-tool marks on concrete surfaces. <br />3.6 CONCRETE PLACEMENT <br />A. Before placing concrete, inspect and complete formwork installation, steel reinforcement, and <br />items to be embedded or cast-in. <br />B. Remove snow, ice, or frost from subbase surface and steel reinforcement before placing concrete. <br />Do not place concrete on frozen surfaces. <br />DocuSign Envelope ID: 7D9ACD4F-8F6C-42B6-9ADB-C60032DB6D03