Journal Published Online: 30 December 2019
Volume 48, Issue 3

Effect of Evotherm-M1 on Properties of Asphaltic Materials Used at NAPMRC Testing Facility

CODEN: JTEVAB

Abstract

Rheological properties of asphalt binders significantly affect distress development and performance of asphalt concrete materials. This article presents the effect of Evotherm-M1 modifications on rheological properties of asphalt binders used in the construction of test sections at the Federal Aviation Administration’s National Airport Pavement & Materials Research Center. Four different binders (i.e., polymer styrene butadiene styrene [SBS]-modified PG 76-22, PG 64-22, SBS-modified PG 76-22 plus Evotherm-M1, and PG 64-22 plus Evotherm-M1) are studied. Multiple stress creep recovery (MSCR) and strain-controlled frequency sweep (FS) test results are analyzed to construct the master curves for the binders. Results indicate high sensitivity of SBS-modified PG 76-22 to Evotherm-M1 modifications as compared with PG 64-22. Subsequently, the results of dynamic modulus tests conducted on asphalt mixture specimens (prepared using job mix formula and different binders) are analyzed to investigate the effect of binder type and modification on rheological properties and rutting performance of asphalt mixtures. It is shown that the rutting resistance and rheological properties of asphalt mixtures can be ranked based on the results of MSCR and FS tests conducted on asphalt binders. It is shown that the rutting resistivity of traffic test sections and lab-tested asphalt mixtures can be ranked as follows: SBS-modified PG 76-22, SBS-modified PG 76-22 plus Evotherm-M1, PG 64-22, and PG 64-22 plus Evotherm-M1. This is consistent with the results obtained for tested asphalt binders.

Author Information

Bazzaz, Mohammad
Construction Materials Testing Department, CSI Geo Inc., Jacksonville, FL, USA
Darabi, Masoud K.
Department of Civil, Environmental and Architectural Engineering, University of Kansas, Lawrence, KS, USA
Little, Dallas N.
Department of Civil Engineering, Texas A&M University, College Station, TX, USA
Garg, Navneet
Airport Technology R&D Branch, William J. Hughes Technical Center, Federal Aviation Administration, Atlantic City, NJ, USA
Pages: 14
Price: $25.00
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Stock #: JTE20190446
ISSN: 0090-3973
DOI: 10.1520/JTE20190446