Specifications - City of Montpelier, Vermont

Montpelier District HeatingCity of Montpelier, VTIssue Date:September 28, 2012Title:02550 – CurbingPage #:10 of 13D. Curing: The precast curb units shall be subjected to any one of the methods of curingprescribed in AASHTO M 199M/M 199, for a sufficient length of time so that theconcrete will develop the specified compressive strength at 28 days or less. Liquidmembraneforming compounds will not be allowed.2.18 BITUMINOUS CONCRETE CURB:Bituminous concrete curb shall consist of blended aggregate, polyester fibers, performancegraded asphalt binder, and mineral filler if required, combined in such proportions that theresulting mixture conforms to the requirements of Vermont Agency of Transportation StandardSpecifications for Construction Subsection 406.03(a), Type IV except that the percent ofperformancegraded asphalt binder shall be between 7.0 and 9.0 percent.A. Aggregate: The aggregate shall conform to the requirements of Vermont Agency ofTransportation Standard Specifications for Construction Subsection 704.10.B. PerformanceGraded Asphalt Binder: The grade of performancegraded asphalt bindershall be as directed by the Engineer and shall conform to the requirements as previouslynoted.C. Polyester Fibers: The type of fiber used shall be approved by the Materials and ResearchSection. The fiber shall be uniformly incorporated into the dry mix. The fiber percentused shall be 0.25 percent per ton of mix. Dry mix times shall be increased to thesatisfaction of the Engineer.PART 3EXECUTION3.1 GENERALA. REMOVING AND RESETTING CURB:1. Salvage of Curbing: The Contractor shall carefully remove, store, and clean anycurbing specified for resetting. Any existing curbing to be reset that is lost,damaged, or destroyed as a result of the Contractor’s operations, or failure tostore and protect it in a manner that would prevent its loss or damage, shall bereplaced at the Contractor’s expense.2. Placing: Excavation, setting joints, and backfilling shall be in accordance withspecifications for the type of curb being removed and reset.3. Cutting and Fitting: Cutting, fitting, or dressing may be necessary in order toinstall the curbing at the locations directed.4. Joints: All sections shall be placed so that the maximum opening betweensections is not more than 1 inch (25 mm) wide for the entire top and face. AnyCURBING 02550 10