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DocuSign Envelope ID: 313DA256 -1EDE- 4396- A716- 4C53B809027E <br />JERRY M. PASSMORE CENTER ADDITION AND RENOVATION <br />HILLSBOROUGH, NORTH CAROLINA <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[, to match jointing of existing adjacent concrete paving]: <br />1. Grooved Joints: Form contraction joints after initial floating by grooving and finishing <br />each edge of joint with grooving tool to a 1/4 -inch (6 -mm) radius. Repeat grooving of <br />contraction joints after applying surface finishes. <br />a. Tolerance: Ensure that grooved joints are within 3 inches (75 mm) either way <br />from centers of dowels. <br />2. Sawed Joints: Form contraction joints with power saws equipped with shatterproof <br />abrasive or diamond - rimmed blades. Cut 1/8 -inch- (3 -mm -) wide joints into concrete <br />when cutting action will not tear, abrade, or otherwise damage surface and before <br />developing random contraction cracks. <br />a. Tolerance: Ensure that sawed joints are within 3 inches (75 mm) either way from <br />centers of dowels. <br />3. Doweled Contraction Joints: Install dowel bars and support assemblies at joints where <br />indicated. Lubricate or coat with asphalt one -half of dowel length to prevent concrete <br />bonding to one side of joint. <br />E. Edging: After initial floating, tool edges of paving, gutters, curbs, and joints in concrete with an <br />edging tool to a 1/4 -inch radius. Repeat tooling of edges after applying surface finishes. <br />3.6 CONCRETE PLACEMENT <br />A. Before placing concrete, inspect and complete formwork installation and items to be embedded <br />or cast -in. <br />B. Remove snow, ice, or frost from subbase surface before placing concrete. Do not place <br />concrete on frozen surfaces. <br />C. Moisten subbase to provide a uniform dampened condition at time concrete is placed. Do not <br />place concrete around manholes or other structures until they are at required finish elevation and <br />alignment. <br />D. Comply with ACI 301 (ACI 301 M) requirements for measuring, mixing, transporting, and <br />placing concrete. <br />E. Do not add water to concrete during delivery or at Project site. Do not add water to fresh <br />concrete after testing. <br />CONCRETE PAVING 321313-8 <br />