Alternative Title

IDEA Program Final Report, Project NCHRP-143

Abstract

Due to the rising price of crude oil, flexible pavement costs have increased significantly. This price pressure has resulted in the increased use of reclaimed asphalt pavement (RAP) and/or reclaimed asphalt roofing shingles (RAS) because of the binder (asphalt cement) they contain. This has increased demand for recycling (rejuvenating) agents which return the RAP/RAS binders to their original state by 1) restoring maltenes (petroleum oils and resins) that have been depleted due to age-hardening/oxidation, and 2) reducing their viscosity. The project concept was to design a flexible pavement mixture (FPM) produced with little-to-no virgin petroleumbased binder which implied the use of high percentages of RAP and/or RAS, and a bio-based virgin binder. The potential impacts of a renewable (bio-based), domestic source of FPM binder on highway construction could be lower costs and, perhaps more importantly, a decreased dependence on foreign oil.

Department(s)

Civil, Architectural and Environmental Engineering

Document Type

Report - Technical

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2013 Transportation Research Board, All rights reserved.

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