Journal Published Online: 06 September 2013
Volume 41, Issue 6

Effect of Binder Type, Mastic, and Aggregate Type on the Low-Temperature Characteristics of Modified Hot Mix Asphalt

CODEN: JTEVAB

Abstract

The purpose of this study was to evaluate the effect of binder type, mastic, and aggregate type on the low-temperature cracking characteristics of asphalt mixtures. Six different performance grade (PG) binders were utilized for this study: PG64-28, PG64-28 with poly phosphoric acid, PG64-34 SBS, PG76-22 SBS, a terminal blend asphalt rubber, and PG64-28 with 2 % latex. Each binder was tested to determine its low-temperature cracking resistance using the asphalt binder cracking device (ABCD) and the Superpave tests. A Superpave 9.5 mm mixture was designed using each of the six binders for this study and two sources of aggregates (crushed stone and gravel). Each mixture was then tested for low-temperature cracking resistance using the asphalt concrete cracking device (ACCD). Mastics corresponding to each mixture were tested for low-temperature cracking resistance using the ABCD. Analysis of the results showed that the AASHTO critical cracking temperature had a strong correlation with the ABCD binder and mastics results, but did not correlate well with the mixture tests. Mastic testing generally did not correlate well with the mixture test results. ABCD and ACCD tests results indicated that they were sensitive to binder type, aging time, and aggregate types.

Author Information

Mogawer, Walaa
Highway Sustainability Research Center (HSRC), Professor—Civil and Environmental Engineering Dept., Univ. of Massachusetts Dartmouth, Fall River, MA, US
Austerman, Alexander
Highway Sustainability Research Center (HSRC), Univ. of Massachusetts Dartmouth, Fall River, MA, US
Kim, Sang-Soo
Dept. of Civil Engineering, Ohio Univ., Athens, OH, US
Pages: 10
Price: $25.00
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Details
Stock #: JTE20120181
ISSN: 0090-3973
DOI: 10.1520/JTE20120181