TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

Workability and Engineering Performance Characterization of Warm Asphalt Rubber Mixtures Prepared with Various WMA Additives

Accession Number:

01660206

Record Type:

Component

Abstract:

Warm mix asphalt (WMA) technology offers a promising solution to address the workability concern of asphalt rubber (AR) mixture. Warm asphalt rubber (WAR), the combination of AR and WMA, is a potential sustainable paving technology that integrates various benefits, such as energy conservation, waste management, noise reduction, and performance optimization. This study aims to characterize and compare the workabilities and engineering properties of the WAR mixtures prepared with various WMA additives. To achieve this goal, laboratory WAR mixture samples were prepared with 40-mesh crumb rubber and five different WMA additives, including Evotherm-DAT, Evotherm-3G, Sasobit, #56 paraffin wax and Aspha-min. Comprehensive laboratory tests were conducted to characterize their workabilities and engineering properties, including moisture susceptibility, stiffness modulus, dynamic modulus, and rutting and fatigue resistance. The test results indicated that the construction temperatures of all WAR mixtures in this study can be at least 16°C lower than that of their corresponding hot AR mixtures, achieving the similar compaction level. The stiffness modulus and dynamic modulus of the WAR mixtures varied depending on the type of the WMA additive that has been used. All WAR mixtures exhibited acceptable moisture susceptibility, rutting resistance and fatigue resistance. Among various WMA additives, Sasobit provided the most satisfying performance. Overall, the results of the mixture mechanical analyses are consistent with those of the binder rheological analysis, except for fatigue resistance.

Supplemental Notes:

This paper was sponsored by TRB committee AFK30 Standing Committee on Non-Binder Components of Asphalt Mixtures.

Report/Paper Numbers:

18-03339

Language:

English

Authors:

Yu, Huayang
Leng, Zhen
Zhang, Yuan
Tan, Zhifei
Guo, Feng
Yan, Jinhai

Pagination:

17p

Publication Date:

2018

Conference:

Transportation Research Board 97th Annual Meeting

Location: Washington DC, United States
Date: 2018-1-7 to 2018-1-11
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Identifier Terms:

Aspha-Min; Evotherm; Sasobit

Subject Areas:

Highways; Materials; Pavements

Source Data:

Transportation Research Board Annual Meeting 2018 Paper #18-03339

Files:

TRIS, TRB, ATRI

Created Date:

Jan 8 2018 10:49AM