Journal Published Online: 27 June 2022
Volume 50, Issue 5

Performance Evaluation of High Modulus Asphalt Concrete (HMAC) Prepared Using Asphaltenes-Modified Binders

CODEN: JTEVAB

Abstract

High strength, extended fatigue life, and improvement in rutting resistance are the main advantages of using high modulus asphalt concrete as a base course material in the pavement structure. The primary goal of this paper was to investigate the performance properties of the high modulus base course using different asphaltenes-modified binders. A crude oil binder and two different asphalt binders from Alberta oil sands sources were used to prepare the mixtures. To prepare hard-grade asphalt binders, all binders were modified using asphaltenes, a waste byproduct of the deasphalting of Alberta oil sands. The performance grades of the modified and unmodified binders were determined, and a mix design was developed for the high modulus asphalt concrete mixes. To evaluate the performance properties of high modulus asphalt concrete mixes composed of unmodified and asphaltenes-modified binders, Hamburg wheel tracking, dynamic modulus and flow number, and indirect tensile strength at low temperature were conducted. The high-temperature performance test results, including Hamburg wheel tracking and flow number tests, indicated that asphaltenes-modified mixtures show higher resistance to permanent deformation. However, the indirect tensile strength test results at low temperature showed higher tensile strength and lower fracture energy for the asphaltenes-modified mixtures compared with the unmodified samples. Moreover, according to the dynamic modulus test results, the asphaltenes-modified mixtures exhibited higher modulus values (stiffness) than the unmodified samples at different loading frequencies compared with the unmodified samples.

Author Information

Kamran, Farshad
Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, Canada
Ghasemirad, Amirhossein
Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, Canada
Baghaee Moghaddam, Taher
Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, Canada
Bayat, Alireza
Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, Canada
Hashemian, Leila
Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, Canada
Pages: 16
Price: $25.00
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Stock #: JTE20210772
ISSN: 0090-3973
DOI: 10.1520/JTE20210772