Reclaiming. The Contractor shall pulverize the existing pavement in multiple passes of the reclaimer, applying sufficient mechanical effort to reduce the fragments to a maximum size of 75 mm (3 inches). In this process the pulverized material shall be combined uniformly with the base and subgrade to a depth which the Public Works/Engineering Department may specify. Following the reclaimer, a roller shall be applied to compact the blended material sufficiently to support traffic temporarily. The depth of material to be compacted shall not exceed .150 mm (6 in). The Public Works/Engineering Department may require removal of up to 50 mm (2 in) of pulverized material prior to addition of the stabilizing agent. When the pulverizing and mixing step is complete, the material shall be graded, watered, remixed, shaped, and compacted as necessary to establish proper grade and uniform thickness and to support traffic temporarily. Water shall be applied if necessary to obtain uniform moisture content as the Public Works/Engineering Department may specify. The Contractor shall apply additional water at frequent intervals as needed to suppress dust, preserve the surface, and maintain the specified moisture content. The stabilizing agent shall then be applied and mixed to the depth specified by the Public Works/Engineering Department, and grading and compaction of the combined base material shall proceed immediately behind the mixing of the stabilizing agent. Before final grading and the addition of the emulsion, when directed by the Public Works/Engineering Department, the Contractor shall adjust the cross-slope, super elevation, and profile grade by adding granular base material in areas the Public Works/Engineering Department may designate.
Reclaiming. The work item for Reclaimed Asphalt Base Course shall consist of pulverizing an existing bituminous pavement and its base course and mixing them together, adding water and new base material as the Public Works/Engineering Department may require; injecting the specified stabilizing agent directly into the mixing chamber of the reclaiming machine and uniformly mixing it with the pulverized material at the rate and depth specified; and watering, shaping, grading, and compacting the blended material to produce a stabilized base course, true to the established line and grade of the road. Areas to be widened shall be excavated and filled with new base material prior to the reclaiming operation and the Contractor shall apply the reclaiming machine to mix and stabilize the widening area with the existing layers in the same operations. The Contractor may be required to perform reclaiming work while traffic is maintained in another lane or lanes of the road. The work item for Reclaimed Asphalt Base Course shall include all necessary traffic control services provided during the reclaiming operation which are not covered under other work items in the Contract. All traffic control and maintenance of traffic is to be performed in conformity with Agency standards with Roadway and Traffic Design Standards, published by the Florida DOT, and with the Manual for Traffic Control Devices, published by the U.S. Department of Transportation. MATERIALS
Reclaiming. Pulverize the existing pavement and underlying base or subgrade materials using a self- propelled reclaimer with a recycling or mixing drum capable of pulverizing to the specified depth. The cutting drum must have the ability to operate at various speeds (rpm), independent of the machine’s forward speed, in order to meet the specified gradation. Operate the cutting drum in the "up" direction. If rain is expected and cement is not added to the pulverized material the same day, seal and properly drain the pulverized material. The Engineer will conduct laboratory tests on the pulverized material to verify gradation and establish optimum moisture content.
