Determination of Damage Development in Asphalt Concrete Using Small-Scale Accelerated Pavement Testing via Frequency Domain Analysis Approach
Publication: Journal of Transportation Engineering
Volume 138, Issue 6
Abstract
To predict the pavement response correctly at any condition, the constitutive relation between stress and strain will require the use of a damaged modulus. Several asphalt concrete slabs constructed in the laboratory using vibratory roller compactor and instrumented with strain gauges and thermocouples were tested under the one-third scaled accelerated loading device called MMLS3. A frequency domain approach has been used to analyze the continuous strain data. The constitutive equation in time domain has been transformed to frequency domain using the Fourier transform technique, and the complex modulus values have been determined continuously during the loading. The results indicated that complex modulus is affected by the combined effect of loading and temperature. A general trend of reduction of complex modulus attributable to these factors has been observed in the study. The analysis results indicate that the frequency domain approach is an efficient and better way to handle large amount of data generated in long-term pavement studies and it can be used to determine the change in the complex modulus attributable to loading.
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Acknowledgments
The authors are grateful to MDOT for funding this research, Mr. Jon Gould of WPI, Heather Bolton and Dr. Jo Sias Daniel of the UNH for their help in conducting laboratory study. The authors appreciate the technical advice provided by Prof. Frederick Hugo of University of Stellenbosch, South Africa. and Mr. Johan Muller for technical services for running MMLS3 during the tests. The authors also thank Dr. A. K. Swamy of University New Mexico for his help in literature search.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 138 • Issue 6 • June 2012
Pages: 723 - 731
Copyright
© 2012. American Society of Civil Engineers.
History
Received: May 3, 2010
Accepted: Nov 22, 2011
Published online: Nov 24, 2011
Published in print: Jun 1, 2012
Published ahead of production: Jun 15, 2012
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