Influence of Temperature and Pressure on the Dynamic Properties of Rubber-Modified Asphalt Concrete
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 1
Abstract
Results from a series of resonant column tests on two blends of rubber-modified asphalt under varying temperature and pressure conditions are presented. The blends of rubber-modified asphalt tested were samples of Type C, with a 20% rubber content, and Type E, with a 10% rubber content. A sample of conventional asphalt was tested for comparison purposes. These three samples were tested in a resonant column device for their shear moduli and damping ratios under various temperature and pressure conditions to simulate the range of loading environments expected in typical high-speed railway foundations. It is shown that as the rubber content of the asphalt blend increases, the shear modulus and damping ratio of the material increases; additionally, the shear moduli and damping ratios are strongly correlated to changes in temperature. The shear modulus and pressure are related as well, with the stiffness decreasing slightly as the confining pressure is increased; however, temperature effects tend to dominate the behavior of all of the asphalt mixes. Comparing these results to the data from five years ago, there has been little change in the shear moduli of the asphalt samples.
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Acknowledgments
The writers wish to thank the IDEA program of the National Research Council of the National Academy of Sciences for support in this research; the project director is Mr. Charles Taylor. The opinions expressed in this paper are those of the writers and do not represent the official policy of the funding agency.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 1 • February 2006
Pages: 125 - 131
Copyright
© 2006 ASCE.
History
Received: Jun 17, 2004
Accepted: Apr 8, 2005
Published online: Feb 1, 2006
Published in print: Feb 2006
Notes
Note. Associate Editor: Eyad Masad
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