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Title:

Spectroscopic Evaluation of Recycled Asphalt Pavement Materials

Accession Number:

01373667

Record Type:

Component

Abstract:

Environmental stewardship and economic hardships require transportation agencies to put more effort on sustainability of asphalt pavements. Over the last two decades, recycled asphalt pavements (RAP) have increasingly been used in both new pavement construction and rehabilitation projects. One drawback of using RAP in asphalt mix production is an elevated level of oxidation in RAP-containing mixtures, which may result in excessive hardening and cracking susceptibility of asphalt pavement. Therefore, it is of utmost importance to control level of oxidation in RAP-modified asphalts. The ongoing Second Strategic Highway Research Program (SHRP2) R06 (B) project titled “Evaluating Applications of Field Spectroscopy Devices to Fingerprint Commonly Used Construction Materials” at the University of Connecticut targets, among the other objectives, the evaluation of oxidation in RAP. In particular, the study investigates the effect of the RAP content on the concentration of oxidized functionalities in asphalt by using advanced yet portable and easily interpretable spectroscopic methods. Two types of samples are prepared in the laboratory: binder blends containing 15 to 40 percent weight RAP-binder and loose hot mix asphalt samples modified by up to 80 percent weight RAP. Spectroscopic measurements are performed using portable attenuated total reflection Fourier transform infrared (ATR FT-IR) spectrometer. Quantitative analysis of the ATR spectra indicates that an increase in RAP content is highly associated with concentration of ketones and sulfoxides in RAP binder. Furthermore, it is possible to determine RAP content based on the analysis of extracted RAP binder.

Monograph Accession #:

01362476

Report/Paper Numbers:

12-1259

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Yut, Iliya
Zofka, Adam

Pagination:

17p

Publication Date:

2012

Conference:

Transportation Research Board 91st Annual Meeting

Location: Washington DC, United States
Date: 2012-1-22 to 2012-1-26
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials

Source Data:

Transportation Research Board Annual Meeting 2012 Paper #12-1259

Files:

TRIS, TRB

Created Date:

Feb 8 2012 5:00PM