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Title:

Using GPC to Predict Viscoelastic Properties of RAS Binder and Its Use in RAS Blending Efficiency

Accession Number:

01478733

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Reuse of the asphalt binder from Recycled Asphalt Shingles (RAS) is at the forefront of the industry due to dwindling natural resources and the potential economic benefits. However, the blending efficiency of RAS binder with virgin binder remains unknown to the asphalt industry. This paper conducted research on the correlation between percentages of large molecules (LMS) defined by Gel Permeation Chromatography (GPC) with viscoelastic properties of RAS binders and investigated the blending efficiency of RAS binders based on this relationship. Aggregate size, RAS content and mixing time were evaluated as factors that affect the blending efficiency. The test results showed that percentages of LMS were highly correlated with the complex modulus. Based on GPC test results, increasing mixing time led to better blending of RAS mixture and the size of virgin aggregate didn't affect the blending efficiency. Partial blending was investigated in this study and the best blending efficiency may occur with the addition of around 5% RAS by weight.

Supplemental Notes:

This paper was sponsored by TRB committee AFK20 Characteristics of Asphalt Materials.

Monograph Accession #:

01470560

Report/Paper Numbers:

13-5013

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Zhao, Sheng
Bowers, Benjamin
Huang, Baoshan
Shu, Xiang

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; I30: Materials

Source Data:

Transportation Research Board Annual Meeting 2013 Paper #13-5013

Files:

TRIS, TRB, ATRI

Created Date:

Feb 5 2013 12:57PM