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- Title
Characterization of Various Plant-Produced Asphalt Concrete Mixtures Using Dynamic Modulus Test.
- Authors
Irfan, Muhammad; Waraich, Asad S.; Ahmed, Sarfraz; Ali, Yasir
- 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.
- Subjects
COMPRESSION loads; DYNAMIC models; FACTORIAL experiment designs; STRAINS &; stresses (Mechanics); CONCRETE
- Publication
Advances in Materials Science & Engineering, 2016, p1
- ISSN
1687-8434
- Publication type
Article
- DOI
10.1155/2016/5618427