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the time concrete is placed . Do not place concrete around manholes or <br /> other structures until they are completed to required finish elevation and <br /> alignment. All concrete driveways shall be FDOT Class 1 and a minimum of <br /> 6 inches thick with wire or fiber mesh reinforcement . All sidewalks shall be a <br /> minimum of 4 inches thick, shall be sawcut every 5 feet, and shall have an <br /> expansion joint every 30 feet. <br /> 1 . Place concrete using methods which prevent segregation of the mix. <br /> Consolidate concrete along the face of forms and adjacent to <br /> transverse joints with an internal vibrator. Keep vibrator away from <br /> joint assemblies, reinforcement, or side forms. Use only square- <br /> faced shovels for hand-spreading and consolidation . Consolidate <br /> with care to prevent dislocation of reinforcing , dowels, and joint <br /> devices . Do not use vibrators to push or move concrete in forms or <br /> chute . <br /> 2 . Deposit and spread concrete in a continuous operation between <br /> transverse joints, as far as possible . If interrupted for more than one- <br /> half hour, place a construction joint. <br /> 3 . Curbs and Gutters: Automatic machine may be used for curb and <br /> gutter placement at Contractor's option . If machine placement is to <br /> be used , submit revised mix design and laboratory test results which <br /> meet or exceed the minimum herein specified . Machine placement <br /> must produce curbs and gutters to the required cross-section , <br /> lines , grades, finish , and jointing as specified for formed concrete. If <br /> results are not acceptable , remove and replace with formed concrete <br /> as specified . <br /> 4 . Joints: Construct expansion , weakened-plane (contraction), and <br /> construction joints true-to-line with face perpendicular to surface of <br /> the concrete , unless otherwise indicated . Construct transverse joints <br /> at right angles to the centerline , unless otherwise indicated . When <br /> joining existing structures, place transverse joints to align with <br /> previously-placed joints , unless otherwise indicated . <br /> a . Weakened-Plane Joints : Provide weakened-plane <br /> (contraction ) joints sectioning concrete into areas where <br /> required . Construct weakened-plane joints for a depth equal <br /> to at least one-quarter concrete thickness , by sawing within <br /> 24 hours of placement or formed during finishing operations. <br /> Place joints at intervals not to exceed 10 feet, if not <br /> otherwise indicated . <br /> b . Construction Joints: Place construction joints at the end of <br /> all pours and at locations where placement operations are <br /> stopped for a period of more than one-half hour, except <br /> where such pours terminate at expansion joints. <br /> Construction joints shall be as shown or, if not shown , use <br /> standard metal keyway-section form of appropriate height. <br /> C. Expansion Joints: <br /> ( 1 ) Provide premolded joint filler for expansion joints <br /> abutting concrete curbs, catch basin , manholes, <br /> 02576 Pavement, Sidewalk, and Driveway Replacement.doc <br /> 02576 - 6 <br /> Ji07-02912 Inch W M - Vero Lake EstatesOommentslReportslBidding Contract Specifications%02576 Pavement, Sidewalk, and Driveway Replacemenldoc <br />