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the specified W/C ratio . The minimum slump necessary to place the concrete satisfactorily <br /> shall be used. Slumps should be maintained so as not to exceed 2 thm 4 - 1 /2 inches for non- <br /> vibratory placement and 1 thru 3 inches for vibrated placement. <br /> 2 .05 CONSTRUCTION JOINT MATERIALS <br /> Joint construction and sealing materials shall be as follows : <br /> A. Sheet metal bottom strips for expansion joints shall be galvanized sheet metal of 0.0157- <br /> inch (30 gauge) minimum thickness, conforming to ASTM A525 . <br /> B . Preformed Joint Filler shall be of the cellulose fiber type, conforming to AASHTO - M 213 . <br /> Material shall be of the Sealtight line as manufactured by W .R. Meadows, or approved equal. <br /> C . Preformed Elastomeric Seals shall be of the open cell compression type, conforming to the <br /> Florida D.O .T . Standard Specifications for Road and Bridge Construction, 2006 <br /> Edition, Section 932 , <br /> D . Bond Breaker Rod shall be closed cell, expanded polyethylene foam rods conforming to the <br /> Florida D .O .T. Standard Specifications for Road and Bridge Construction, 2006 <br /> Edition, Section 932 . <br /> E . Liquid Joint Sealant shall be : a hot — applied, polymeric sealing compound conforming to <br /> AASHTO - M 173 . Material shall be "Sealtight" # 164 as manufactured by W.R. Meadows ; a <br /> low modulus, one part silicone sealant; or approved equal conforming to the Florida D.O .T . <br /> Standard Specifications for Road and Bridge Construction, 2006 Edition, Section 932 . <br /> 2 .06 CONCRETE CURING MATERIALS <br /> A . Membrane Curing Compounds for concrete shall be the pigmented type conforming to the <br /> requirements of AASHTO — M 148 (Type 2), conforming to the Florida D. O .T . Standard <br /> Specifications for Road and Bridge Construction, 2006 Edition, Section 925 . <br /> B . Polyethylene Film may be used for curing when, in conjunction with protection of the pavement <br /> from inclement weather, the polyethylene film is applied over the entire pavement and <br /> maintained intact for a minimum of three (3) days. Polyethylene film and it ' s use shall conform <br /> to the Florida D. O . T. Standard Specifications for Road and Bridge Construction, 2006 <br /> Edition, Section 925 . <br /> PART 3 - EXECUTION OF WORK <br /> 3 . 01 SUBGRADE PREPARATION <br /> A . The bottom of the excavation for the concrete pavement or top of the earth fill under the <br /> pavement shall be known as the pavement subgrade and shall conform to the lines, grade and <br /> cross sections shown on the plans. <br /> B . The subgrade shall be placed or prepared upon ground which has been cleared, grubbed and, if <br /> necessary, demucked. If the subgrade is upon a filled embankment, the fill material shall be free <br /> from all unsuitable materials such as muck, rubbish, stumps, brush, clay pockets, etc. which <br /> will not compact into stable and durable foundation for the subgrade. Fill or the excavated <br /> 02752 - Concrete Paving <br /> 02752m4 <br />