01155554

Component

https://doi.org/10.3141/2179-11

http://scholar.google.com...olar&publication_year=2010

In December 2007, a portion of State Route 11 in Deland, Florida, was milled and repaved with 45% reclaimed asphalt pavement (RAP). These high RAP mixes were produced at lower than normal hot-mix temperatures and with foamed warm-mix asphalt (WMA) technology. This project was the first large production in which the Florida Department of Transportation (DOT) allowed the use of high RAP in combination with WMA. FHWA, in cooperation with Florida DOT and the National Center for Asphalt Technology, was on site for production and placement of the high RAP-WMA. Plant-produced mix was collected by FHWA for performance testing evaluation. Two mixes were produced: a high RAP–hot-mix asphalt (HMA) control mix and a high RAP-WMA mix. Performance tests conducted by FHWA included performance grade (PG) determination of binders, dynamic modulus, and flow number. PG results of the binders indicate that the high RAP-WMA mix is softer than the high RAP-HMA control mix. This is further confirmed by flow number results, where the high RAP-WMA mix had a lower flow number than the high RAP-HMA control mix did. Dynamic modulus results indicate that the high RAP-WMA mix is slightly softer than the high RAP-HMA control mix, especially at intermediate temperatures. Comparison of measured dynamic modulus results with those predicted using the Hirsch and Witczak models confirm that complete blending occurred in the high RAP-HMA control mix. However, incomplete mixing of RAP and virgin binders may have occurred in the high RAP-WMA mix.

01324883

10-3792

English

pp 93-101

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309160520

Print

Figures (10) ; References (14) ; Tables (3)

Asphalt mixtures; Bituminous binders; Blending; Dynamic modulus of elasticity; Field tests; Performance tests; Reclaimed asphalt pavements; Recycled materials; Warm mix paving mixtures

Flow number; Performance grades

Florida

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Jan 25 2010 11:56AM

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• Backcalculation Method to Determine Effective Asphalt Binder Properties of Recycled Asphalt Pavement Mixtures
• Correlating Rheological and Bond Properties of Emulsions to Aggregate Retention of Chip Seals
• Energy, Emissions, Material Conservation, and Prices Associated with Construction, Rehabilitation, and Material Alternatives for Flexible Pavement
• Estimation of Reclaimed Asphalt Pavement Binder Low-Temperature Properties Without Extraction: Development of Testing Procedure
• Influence of Aging Temperature on Rheological and Chemical Properties of Asphalt Binders
• Measurement of Water Diffusion in Asphalt Binders Using Fourier Transform Infrared–Attenuated Total Reflectance
• New Technique for Measuring Low-Temperature Properties of Asphalt Binders with Small Amounts of Material
• Polyphosphoric Acid Modification of Asphalt
• Rheological Behavior of Emulsion Residues Produced by Evaporative Recovery Method
• Use of Alkali–Silica Reaction-Affected Recycled Concrete Aggregate in Hot-Mix Asphalt