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Title:

Effect of RAP and RAS Mixture on Flexible Pavement Design

Accession Number:

01592508

Record Type:

Component

Abstract:

Recycled asphalt pavement (RAP) and recycled asphalt shingles (RAS) are now being widely used in the construction of new and rehabilitated pavements. The mechanical and rheological properties of hot-mix asphalt (HMA) containing RAP and RAS have been the topic of extensive research lately. In this study, flexible pavement sections incorporating virgin HMA mix and six other HMA mixes with varying percentages of RAP and RAS have been designed using the AASHTOWare Pavement ME Design software. Three different pavement structure types and both level 3 traffic inputs (Pavement ME default) and level 2 traffic inputs developed for Kansas rural arterials were used in the design analysis. The required pavement thickness for the virgin mix was found to be less than that required for HMA mixes with RAP and RAS. Pavement ME design software predicted significant top-down fatigue cracking for some mixtures with RAP and RAS. The predicted rut depths for mixes with RAP and RAS seemed to vary with RAS source and RAP and RAS content. The designs were also very sensitive to subgrade soil type but not so to the aggregate base (if used) thickness.

Supplemental Notes:

This paper was sponsored by TRB committee AFD60 Standing Committee on Flexible Pavement Design.

Monograph Accession #:

01584066

Report/Paper Numbers:

16-5775

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Islam, Shuvo
Sufian, Abu
Tavakol, Masoumeh
Hossain, Mustaque

Pagination:

17p

Publication Date:

2016

Conference:

Transportation Research Board 95th Annual Meeting

Location: Washington DC, United States
Date: 2016-1-10 to 2016-1-14
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Identifier Terms:

AASHTOWare (Software)

Geographic Terms:

Kansas

Subject Areas:

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

Source Data:

Transportation Research Board Annual Meeting 2016 Paper #16-5775

Files:

TRIS, TRB, ATRI

Created Date:

Jan 12 2016 6:32PM