Rutting performan
Rutting performance of Polyethylene, Lime and Elvaloy modified Asphalt Mixes
Kamran Muzaffar Khan 1, Hanifullah 2, Mujaddad Afzal 3, Faizan Ali 4, Afaq Ahmed 5, Tahir Sultan6
1* Associate Professor,
Department of Civil Engineering, UET Taxila, Pakistan. [email protected]
2 Lecturer, Department of Civil Engineering, UET Taxila, Pakistan. [email protected]
3, 4 Research Associate, Department of Civil Engineering, UET Taxila,
Pakistan. [email protected]
5 Lecturer, Department of Civil Engineering, UET Taxila, Pakistan. [email protected]
6 Lecturer, Department of Civil Engineering, BZU Multan, Pakistan. [email protected]
Abstract: A key element in the performance of asphalt is its resistance to rutting. Many modifiers can be used to improve the properties of asphalt and to enhance its rut resistance. This research is aimed to evaluate the effectiveness of Polyethylene modified, Lime modified and Elvaloy modified asphalt mixes in improving the performance of asphaltic concrete regarding rutting resistance and to compare it with the performance of conventional NHA (National Highway Authority Pakistan) Class-A mix. In this study the compacted asphalt mixes were tested for resistance to rutting by subjecting all the specimens to 10,000 repetitions of a loaded wheel and the rut depth for each specimen was determined using wheel tracking machine. Polyethylene modified mixes showed better resistance to rutting than all the other mixes and the conventional NHA class-A mix showed the poorest performance. The order of performance is polyethylene modified mix performed best, then lime modified mix, then elvaloy modified mix and then conventional (unmodified) NHA class-A mix. Results indicated that better quality asphalt concrete mixes regarding rut resistance can be prepared using lime modified mixes, polyethylene modified mixes and using polymer modified bitumen (PMB) in the HMA instead of unmodified bitumen.[Kamran M.K, Haniffulah, Mujaddad A., Faizan A., Afaq A., Tahir S. Rutting performance of Polyethylene modified, Lime modified and Elvaloy modified Asphalt Mixes Life Sci J 2013;10(7s): 363-371] (ISSN: 1097-8135).] http://www.lifesciencesite.com. 58
Keywords: Hot Mix Asphalt (HMA), Rutting, Low Density Polyethylene (LDPE), hydrated lime, PMB, Wheel tracker.
