Comparison of Rheological Properties for Polymer Modified Asphalt Produced in Riyadh

Authors: Ali M. Babalghaith, Hamad A. Alsoliman, Abdulrahman S. Al-Suhaibani

Abstract:

Flexible pavement made with neat asphalt binder is not enough to resist heavy traffic loads as well as harsh environmental condition found in Riyadh region. Therefore, there is a need to modify asphalt binder with polymers to satisfy such conditions. There are several types of polymers that are used to modify asphalt binder. The objective of this paper is to compare the rheological properties of six polymer modified asphalt binders (Lucolast7010, Anglomak2144, Paveflex140, SBS KTR401, EE-2 and Crumb rubber) obtained from asphalt manufacturer plants. The rheological properties of polymer modified asphalt binders were tested using conventional tests such as penetration, softening point and viscosity; and SHRP tests such as dynamic shear rheometer and bending beam rheometer. The results have indicated that the polymer modified asphalt binders have lower penetration and higher softening point than neat asphalt indicating an improvement in stiffness of asphalt binder, and as a result, more resistant to rutting. Moreover, the dynamic shear rheometer results have shown that all modifiers used in this study improved the binder properties and satisfied the Superpave specifications except SBS KTR401 which failed to satisfy the rutting parameter (G*/sinδ).

Keywords: Polymer modified asphalt, rheological properties, SBS, crumb rubber, EE-2.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1111809

References:

[1] I. A. Al-Dubabe, Polymer modification of Arab asphalt to suit Gulf countries performance requirments phD Dissertation. (1996).
[2] H. Al-Abdul Wahhab, and F. Balghunaim, Asphalt pavement temperature related to arid Saudi environment. Journal of materials in civil engineering. 6, 1-14 (1994).
[3] H. I. Al-Abdul Wahhab, I. M. Asi, I. A. Al-Dubabe, and M. F. Ali, Development of performance-based bitumen specifications for the Gulf countries. Construction and Building Materials. 11, 15-22 (1997).
[4] H. A. ALsolieman. Engineering characteristics of local polymer modified asphalt mixtures (dissertation). King Saud University (2010).
[5] H. I. Al-Abdul Wahhab, I. M. Asi, I. Abaker, and M. G. Baig, Performance Modification of Saudi-Asphalt Binders Using SABIC Polymers. (2002).
[6] I. A. Al-Dubabe, H. I. Al-Abdul Wahhab, I. M. Asi, and M. F. Ali, Polymer modification of Arab asphalt. Journal of materials in civil engineering. 10, 161-167 (1998).
[7] G. D. Airey, Rheological properties of styrene butadiene styrene polymer modified road bitumens. Fuel. 82, 1709-1719 (2003).
[8] B. V. Kök, and H. Çolak, Laboratory comparison of the crumb-rubber and SBS modified bitumen and hot mix asphalt. Construction and Building Materials. 25, 3204-3212 (2011).
[9] P. Kumar, H. Mehndiratta, and K. L. Singh, Comparative study of rheological behavior of modified binders for high-temperature areas. Journal of Materials in Civil Engineering. (2010).
[10] American Society for Testing and Materials (ASTM), (2004).
[11] M. R. S. Fernandes, M. M. C. Forte, and L. F. M. Leite, Rheological evaluation of polymer-modified asphalt binders. Materials research. 11, 381-386 (2008).
[12] D. A. Anderson, and T. W. Kennedy, Development of SHRP binder specification (with discussion). Journal of the Association of Asphalt Paving Technologists. 62, (1993).