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Advances in Materials Science and Engineering
Volume 2016, Article ID 5618427, 12 pages
http://dx.doi.org/10.1155/2016/5618427
Research Article

Characterization of Various Plant-Produced Asphalt Concrete Mixtures Using Dynamic Modulus Test

1Military College of Engineering, National University of Sciences & Technology (NUST), Risalpur Campus, Risalpur 24080, Pakistan
2Department of Civil, Environmental, and Construction Engineering, University of Central Florida (UCF), 12800 Pegasus Drive No. 211, Orlando, FL 32816-2450, USA
3National Institute of Transportation, School of Civil and Environment Engineering, National University of Sciences & Technology, Islamabad 44000, Pakistan

Received 7 January 2016; Accepted 18 February 2016

Academic Editor: Osman Gencel

Copyright © 2016 Muhammad Irfan 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 research characterizes the performance of various plant-produced asphalt concrete mixtures by dynamic modulus E test using asphalt mixture performance tester (AMPT). Marshall designed specimens of seven different mixtures were prepared using the Superpave gyratory compactor and subjected to sinusoidal compressive loading at various temperatures (4.4 to 54.4°C) and loading frequencies (0.1 to 25 Hz). A catalog of default dynamic modulus values for typical asphalt concrete mixtures of Pakistan was established by developing stress-dependent master curves separately, for wearing and base course mixtures. The sensitivity of temperature and loading frequency on determination of dynamic modulus value was observed by typical isothermal and isochronal curves, respectively. Also, the effects of various variables on dynamic modulus were investigated using statistical technique of two-level factorial design of experiment. Furthermore, two dynamic modulus prediction models, namely, Witczak and Hirsch, were evaluated for their regional applicability. Results indicated that both the Witczak and Hirsch models mostly underpredict the value of dynamic modulus for the selected conditions/mixtures. The findings of this study are envisaged to facilitate the implementation of relatively new performance based mechanistic-empirical structural design and analysis approach.