Orange County NC Website
Browse       Search
9/2/2020 <br /> <br />32 13 13 CONCRETE PAVING Page 7 of 12 <br />1. Completely proof-roll subbase in one direction [and repeat in perpendicular direction]. <br />Limit vehicle speed to 3 mph. <br />2. Proof-roll with a pneumatic-tired and loaded, 10-wheel, tandem-axle dump truck weighing <br />not less than 15 tons. <br />3. Correct sub-base with soft spots and areas of pumping or rutting exceeding a depth of 1/2 <br />inch according to requirements in Division 31 Section "Earth Moving" <br />C. Proceed with installation only after unsatisfactory conditions have been corrected. <br />3.2 PREPARATION <br />A. Remove loose material from compacted subbase surface immediately before placing concrete. <br />3.3 EDGE FORMS AND SCREED CONSTRUCTION <br />A. Set, brace, and secure edge forms, bulkheads, and intermediate screed guides to required lines, <br />grades, and elevations. Install forms to allow continuous progress of work and so forms can <br />remain in place at least 24 hours after concrete placement. <br />B. Clean forms after each use and coat with form-release agent to ensure separation from concrete <br />without damage. <br />3.4 STEEL REINFORCEMENT INSTALLATION <br />A. General: Comply with CRSI's "Manual of Standard Practice" for fabricating, placing, and <br />supporting reinforcement. <br />B. Clean reinforcement of loose rust and mill scale, earth, ice, or other bond-reducing materials. <br />C. Arrange, space, and securely tie bars and bar supports to hold reinforcement in position during <br />concrete placement. Maintain minimum cover to reinforcement. <br />D. Install welded-wire reinforcement in lengths as long as practicable. Lap adjoining pieces at least <br />one full mesh, and lace splices with wire. Offset laps of adjoining widths to prevent continuous <br />laps in either direction. <br />3.5 JOINTS <br />A. General: Form construction, isolation, and contraction joints and tool edges true to line, with faces <br />perpendicular to surface plane of concrete. Construct transverse joints at right angles to centerline <br />unless otherwise indicated. <br />1. When joining existing paving, place transverse joints to align with previously placed joints <br />unless otherwise indicated. <br />B. Construction Joints: Set construction joints at side and end terminations of paving and at locations <br />where paving operations are stopped for more than one-half hour unless paving terminates at <br />isolation joints. <br />DocuSign Envelope ID: 7D9ACD4F-8F6C-42B6-9ADB-C60032DB6D03