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Title:

Analysis of RAP with Known Source History and Influence on Fatigue Performance

Accession Number:

01476006

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

This study characterized RAP materials milled from the upper layer of three accelerated pavement test lanes that were exposed to climatic conditions over a number of years where the original binder and aggregate properties are known from the time of construction. The aggregates and binder in the RAP were extracted using both the solvents and ignition oven and compared to the construction data to quantify the changes in measured properties. Three mixes containing 0%, 20% and 40% RAP taken from one lane were then designed using virgin asphalt and aggregate materials from the same original source. The three mixes were tested for the dynamic modulus and cyclic direct tension fatigue to investigate the effect of RAP content on the mixture performance with a higher degree of control over the volumetric characteristics of the mix designs. Both solvent and ignition oven extraction resulted in a decrease in the aggregate specific gravity and increase in the absorption compared to original values known during construction. Binder content and gradation from solvent and ignition oven extraction were similar for the two unmodified asphalt RAP sources, but the RAP SBS modified asphalt exhibited closer values to the other two RAP materials using the ignition oven and did not with solvent. Mixes with 20% and 40% RAP could be satisfactorily designed to match the 0% RAP volumetrics. The dynamic modulus fatigue tests showed increasing stiffness, decreasing phase angle and decreasing fatigue resistance with increasing RAP.

Supplemental Notes:

This paper was sponsored by TRB committee AFK30 Characteristics of Nonasphalt Components of Asphalt Paving Mixtures.

Monograph Accession #:

01470560

Report/Paper Numbers:

13-4901

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Li, Xinjun
Gibson, Nelson

Pagination:

14p

Publication Date:

2013

Conference:

Transportation Research Board 92nd Annual Meeting

Location: Washington DC, United States
Date: 2013-1-13 to 2013-1-17
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

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

Source Data:

Transportation Research Board Annual Meeting 2013 Paper #13-4901

Files:

TRIS, TRB, ATRI

Created Date:

Feb 5 2013 12:56PM