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Advances in Materials Science and Engineering
Volume 2015 (2015), Article ID 214585, 9 pages
http://dx.doi.org/10.1155/2015/214585
Review Article

Influence of Antioxidant-Enhanced Polymers in Bitumen Rheology and Bituminous Concrete Mixtures Mechanical Performance

1Department of Civil and Environmental Engineering, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0668, USA
2Fugro Roadware, Inc., 8613 Cross Park Drive, Austin, TX 78754, USA
3Department of Civil Engineering, Kunsan National University, 558 Daehak-ro, Kunsan, Chellabuk-do 573-701, Republic of Korea
4Department of Transportation Engineering, Myongji University, San 38-2, Namdong, Yongin-si, Gyeonggi-do 449-728, Republic of Korea

Received 21 August 2015; Accepted 3 November 2015

Academic Editor: Jun Liu

Copyright © 2015 Samer Dessouky et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper evaluates the effect of polymer enhancement with antioxidant in the rheological properties of bitumen and mechanical properties of bituminous concrete mixture (BCM). In this study, two antioxidant-enhanced polymers were utilized in mitigating bitumen hardening due to aging. The rheological testing consists of temperature sweep using Dynamic Shear Rheometer at various aging conditions. Critical stiffness temperature data from the sweep test suggested that enhanced polymer exhibits less long-term hardening and brittleness compared to standard polymer. The mechanical testing consists of dynamic modulus, indirect tensile, flow number, and beam fatigue tests on BCM exposed to short-term aging. Hamburg wheel tracking test was also performed to assess moisture-damage susceptibility. It is found that the enhanced-polymer BCM exhibited higher modulus, higher tensile strength ratio, improved rutting resistance, lower moisture-damage susceptibility, and slightly increased fatigue life as compared to standard-polymer BCM.