Attachment C - Biddding Specification 1-23-25

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THE CITY OF SUNNY ISLES BEACH PROJECT NO. 21-1011 BUILDING DEPARTMENT RELOCATION TO ANNEX Project No. 21-1011 November 2024 027450 -6 materials, the Contractor shall, without additional compensation, dig out and remove the mixture, reshape and compact the subgrade and replace the materials removed with clean rock, which shall be watered and rolled until satisfactorily compacted. D. After the limerock base course has been properly prepared and is dry and ready to receive the wearing surface, a tack coat of emulsified asphalt, shall be applied at a rate of 0.10 gallon per square yard, immediately followed by the asphaltic concrete. The tack coat shall be applied to the entire limerock base uniformly and shall thoroughly coat all surfaced. Care shall be taken to tack coat and bond the edge of surrounding pavement. E. The asphaltic concrete shall be plant mixed, using the best grade of local aggregates of approved size and gradation and mixed with an approved binder and conforming the either the State of Florida Department of Transportation Specifications, Type SP or FC Asphaltic Concrete, Sections 330, 331 and 916 of OT Specifications, or Miami-Dade County Department of Transportation and Public Works Type SP, as ordered by the Engineer of Record. A type SP or FC mix one traffic level higher than the traffic level specified in the Contract may be substituted at no additional cost. F. Where the width of the repair permits, the asphaltic concrete plant mix material shall be placed by means of an approved mechanical spreader and finisher. The mixture shall be compacted to true grade and cross section by means of a tandem roller weighing not less than eight tons. The compacted asphaltic concrete mixture shall not be, in any case, less than one inch in thickness. Rolling shall proceed as closely behind the spreader as possible, and all material shall be completely compacted the same day it is placed. The minimum width of the wearing surface shall be the same as the base. 3.4 TYPE II PAVING REPAIRS (Limerock Base and Asphaltic Concrete Surface) A. Type II repairs shall be used only when the restoration work falls within the limits of a State Road and shall be performed in accordance with the latest Florida Department of Transportation Standard Specifications for Road and Bridge Construction. B. Type II paving repairs shall not be less than 3-inch thick in any case. Required thickness for DOT is 3-inches. C. The backfill previously placed and compacted shall be excavated to the required depth below the existing road surface and the existing paving shall be cut back beyond all excavations, using an abrasive disc saw to trim the edges to straight and true lines. Eighteen inches of limerock base shall be placed in 2 layers, each layer compacted to not less than 98 percent density. Limerock for pavement base shall be Miami limerock obtained from local sources where the overburden was removed from the pits prior to mining operations. The limerock shall comply with the requirements of DOT Specifications, Section 911. D. During rolling, it shall be wet down as necessary to secure the greatest possible compaction. After rolling, the entire surface shall be thoroughly scarified to a depth of not less than 3 inches and shaped to conform to the existing surface, then watered and rolled again. Rolling and watering shall continue until the entire depth of the base is bonded and compacted into an unyielding mass. E. If at any time the subgrade material becomes churned up and mixed with the base course materials, the Contractor shall, without additional compensation, dig out and remove the mixture, reshape and compact the subgrade and replace the materials removed with clean rock which shall be watered and rolled until satisfactorily compacted.