MPC
Project Details

Title:	Effectiveness of Sustainable Asphalt Recycling Agents
Principal Investigators:	Rouzbeh Ghabchi
University:	South Dakota State University
Status:	Active
Year:	2022
Grant #:	69A3551747108 (FAST Act)
Project #:	MPC-689
RiP #:	01848309
RH Display ID:	159296
Keywords:	bituminous binders, cracking, hot mix asphalt, reclaimed asphalt pavements, rutting

Abstract

Studies have shown improved resistance to rutting as a result of incorporating Reclaimed Asphalt Pavement (RAP) in Hot-Mix Asphalt (HMA), they have indicated concerns over premature fatigue failure and thermal cracking. Hence, many Departments of Transportation (DOTs) do not allow or limit the use of any RAP in the surface course HMA. The use of Asphalt Recycling Agents (ARAs) has been introduced for reducing the brittleness of HMA containing RAP. As a result, the use of a higher amount of RAP in asphalt mixes without compromising their resistance to rutting, fatigue cracking, and thermal cracking, is made theoretically possible. However, the effectiveness of different ARAs in increasing the flexibility of asphalt binder and their effects on the long-term performance of HMA remain unknown. Mainly due to the lack of laboratory and field performance data, a widely accepted specification that can be used to select, approve, or evaluate ARAs is not available. To this end, the proposed study will determine how ARAs affect the rutting and cracking resistance of the asphalt mixes and binders containing RAP. This objective will be achieved by conducting a comprehensive laboratory testing program on asphalt binders and mixes.

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