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Title:

Performance Characterization of Reacted and Activated Rubber-Modified Dense-Graded Asphalt Mixtures

Accession Number:

01626345

Record Type:

Component

Abstract:

The objective of this study was to evaluate and characterize the performance of Reacted and Activated Rubber (RAR) modified dense graded asphalt mixtures in order to recommend a suitable RAR content to produce a mix that provides superior pavement performance characteristics. The research effort encompassed investigation of rutting, fatigue, fracture, and moisture susceptibility performance evaluation of seven dense graded asphalt mixtures, including two conventional and five modified mixes covering 108 samples. Addition of RAR showed significant decrease in permanent strains during loading with the rut resistance of the asphalt mixtures increasing with higher RAR dosages. Fatigue resistance of RAR modified asphalt mixtures increased with higher levels of dosages regardless of the base binder. An increase in the RAR dosage from 0 to 2% did not result in a significant change in fracture energy but a further increment to 4% decreased the fracture energy. All the seven asphalt mixtures had similar moisture susceptibility property, and recorded tensile strength ratios of greater than 80% making those mixtures well resistant to stripping issues. Overall, addition of RAR into the mixtures showed very promising performance towards high temperature rutting and fatigue cracking potential. Specifically, higher amounts of RAR, i.e., 4% by weight of the mix, substantially enhanced the rut and fatigue cracking resistance followed by the mix with 2% RAR. It is recommended that other gradations such as gap- and open-graded mixtures be used in future to understand the effect of RAR on performance of the asphalt pavements.

Supplemental Notes:

This paper was sponsored by TRB committee AFK30 Standing Committee on Non-Binder Components of Asphalt Mixtures. Alternate title: Performance Characterization of Reacted and Activated Rubber (RAR) Modified Dense Graded Asphalt Mixtures.

Monograph Accession #:

01618707

Report/Paper Numbers:

17-06769

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Kedarisetty, Sampat
Saha, Gourab
Biligiri, Krishna Prapoorna
Sousa, Jorge B

Pagination:

15p

Publication Date:

2017

Conference:

Transportation Research Board 96th Annual Meeting

Location: Washington DC, United States
Date: 2017-1-8 to 2017-1-12
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Materials; Pavements

Source Data:

Transportation Research Board Annual Meeting 2017 Paper #17-06769

Files:

TRIS, TRB, ATRI

Created Date:

Dec 8 2016 12:47PM