Characterization of hot mix asphalt using the dynamic modulus and wheel tracking testing. | [Proceedings of Pakistan Academy of Sciences • 2012]

Author(s):

1. I. Hafeez: Department of Civil Engineering, University of Engineering & Technology, Taxila, Pakistan

2. M. A. Kamal: Department of Civil Engineering, University of Engineering & Technology, Taxila, Pakistan

3. M. Mahir: University of Engineering & Technology, Taxila, Pakistan

Abstract:

Pavement engineers have been facing the challenges of rutting being the premature asphalt pavement failure especially in hot climatic regions of Pakistan. Researchers have reported that the dynamic modulus test best characterizes asphalt material and can be used as a good index to address asphalt failures. This study is focused on investigating the rutting potential of asphalt concrete mixtures using the dynamic modulus and wheel tracker testing. Two mixtures treated with hydrated lime at1.5% by the aggregate weight and three mixtures without hydrated lime were designed. The neat (without hydrated lime) mixtures contained three polymer modified asphalt binders, namely PG58-16, PG64-22 and PG70-22. Two mixtures treated with hydrated lime were prepared using PG58-16 and PG64-22. Study reveals that polymer modified asphalt mixtures yielded low rutting and high dynamic modulus values under extreme temperature and load frequencies. Also, relationships exist between the rut depth factor and rutting factor. Rutting factor better distinguishes the mixtures than |E*alone.

Page(s): 71-77

DOI: DOI not available

Published: Journal: Proceedings of Pakistan Academy of Sciences, Volume: 49, Issue: 2, Year: 2012

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