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Title:

Laboratory and Field Aging Effects on Emulsion-Treated Bending Beam Rheometer Mixture Beams

Accession Number:

01551958

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Rejuvenation of aged near-surface asphalt binder is commonly accomplished through seal treatment applications (e.g. fog seals). Rejuvenation has traditionally been characterized through viscosity testing of extracted and recovered binder from a pavement’s near surface both pre- treatment and post-treatment (often with emulsion). Recently, an alternative specification approach has been investigated to characterize rejuvenation using m-value results from bending beam rheometer (BBR) testing of emulsion-treated asphalt mixture beams. This approach requires a product to increase a pavement’s m-value by some specified amount to be classified a rejuvenator. Currently, this approach suggests testing emulsion-treated beams which are not aged. However, other research suggests un-aged testing does not fully utilize a product’s rejuvenation potential because some amount of temperature and time may be necessary to facilitate positive interaction of the aged asphalt binder and emulsion, further increasing m-value. The current BBR rejuvenation specification concept could be enhanced by incorporating aging so that products’ full rejuvenation potentials could be evaluated. The objective of this paper is to investigate effects of field and laboratory aging on emulsion-treated BBR mixture beams. Seven emulsions, two field pavements, and laboratory and field aging times up to 180 days were evaluated for a total of 581 successfully-tested BBR beams. Field aging results indicate m-value is further increased with aging to a point at which m-value begins to decrease. The main conclusion of this paper is that simple oven aging did not resemble field-aged behaviors and, as conducted, would not be useful in a performance-oriented rejuvenation specification.

Supplemental Notes:

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

Monograph Accession #:

01550057

Report/Paper Numbers:

15-1573

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Cox, Ben C
Howard, Isaac L

Pagination:

16p

Publication Date:

2015

Conference:

Transportation Research Board 94th Annual Meeting

Location: Washington DC, United States
Date: 2015-1-11 to 2015-1-15
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Uncontrolled Terms:

Bending beam tests; Rejuvenation

Subject Areas:

Highways; Maintenance and Preservation; Materials; Pavements; I31: Bituminous Binders and Materials; I60: Maintenance

Source Data:

Transportation Research Board Annual Meeting 2015 Paper #15-1573

Files:

TRIS, TRB, ATRI

Created Date:

Dec 30 2014 12:35PM