12.07.2015 Views

FP-96 English Version - Eastern Federal Lands Highway Division

FP-96 English Version - Eastern Federal Lands Highway Division

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Section 409Table 409-1Approximate Quantities of Material forSingle-Course Surface TreatmentSequence Treatment Designation and Aggregate Gradation (1)ofOperations B C D E FApply asphalt material(gal/yd 2 )Emulsified asphaltCut-back asphalt orasphalt cement0.450.400.380.250.280.200.200.150.200.15Spread aggregate (1)(2)lbs/yd 2 45 28 23 15 20(1) See Table 703-7 for aggregate gradations.(2) Aggregate masses are for aggregates having a bulk specific gravity of 2.65, asdetermined by AASHTO T 84 and AASHTO T 85. Make proportionate correctionswhen the aggregate furnished has a bulk specific gravity above 2.75 or below 2.55.409.12 Multiple-Course Surface Treatment. A multiple-course surfacetreatment consists of applying multiple layers of asphalt and aggregate. Applyeach asphalt and aggregate layer according to Subsections 409.08 and 409.09and at the approximate rates shown in Table 409-2 or 409-3. Determine theexact rates based on approved control strips.Maintain the surface and limit traffic according to Subsection 409.11.For multiple-course surface treatment designations AT-61 and E-61, wait atleast 24 hours between application of the third and fourth layers.290

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