TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

Influence of Warm Mix Asphalt Additive and Dosage Rate on Construction and Performance of Bituminous Pavements
Cover of Influence of Warm Mix Asphalt Additive and Dosage Rate on Construction and Performance of Bituminous Pavements

Accession Number:

01519331

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Warm mix asphalt (WMA) technology is an effective way to reduce emissions and save energy during asphalt paving by reducing production temperatures of hot mix asphalt (HMA). As development of WMA additive evolve, many owner-agencies do not know the effect WMA dosage rates have on moisture susceptibility, rutting resistance, and mixture compaction at different temperatures. The overall influence of time and temperature on mixture performance is also important. In this research, two versions of a commonly used WMA additive derived from the forest products industry are evaluated for performance during construction and traffic loading. Laboratory specimens with different additive contents (0%, 0.5%, and 1.0%) were compacted at different temperatures (115°C, 130°C, and 145°C), to evaluate shear capability parameters. Statistical analyses of the compaction force index (CFI) indicated the stability of asphalt mixtures at various compaction temperatures. Evaluation of moisture sensitivity and rutting performance was conducted using the indirect tensile strength test and Hamburg wheel tracking test. Improvements were realized at the 0.5% dosage level; therefore, no economic benefit is achieved by increasing the dosage level. Findings from the laboratory were tested in the field to evaluate the effect of curing time and temperature on WMA compared with HMA. A plant-produced mix included HMA and a WMA mixture produced for the same project. The WMA additive used in the plant project is the same additive used in the laboratory study. Loose mix was collected in order to evaluate the influence of curing time and temperature of a WMA mixture.

Supplemental Notes:

This paper was sponsored by TRB committee AFK30 Characteristics of Nonasphalt Components of Asphalt Paving Mixtures.

Monograph Accession #:

01503729

Report/Paper Numbers:

14-3900

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Buss, Ashley
Kuang, Yu
Williams, R Christopher
Bausano, Jason
Cascione, Andrew
Schram, Scott Alan

Pagination:

12p

Publication Date:

2014

Conference:

Transportation Research Board 93rd Annual Meeting

Location: Washington DC
Date: 2014-1-12 to 2014-1-16
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Materials; Pavements; I30: Materials

Source Data:

Transportation Research Board Annual Meeting 2014 Paper #14-3900

Files:

PRP, TRIS, TRB, ATRI

Created Date:

Jan 27 2014 3:21PM