Spherical Indentation Behavior of Asphalt Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 19, Issue 9
Abstract
The spherical indentation response of a dense bitumen macadam asphalt mixture with two different volume fractions of bitumen binder is investigated both experimentally and via an analytical model. The model for the indentation of bitumen developed by Ossa et al. in 2005, was used to study the spherical indentation behavior of the mixtures with good agreement when compared to experimental results. An extensive experimental study of the monotonic and recovery spherical indentation behavior is reported for a range of temperatures. In line with the predictions of the model, the monotonic indentation response of the mixtures exhibits a power-law dependence on the indentation force. The model is also successful in capturing the indentation recovery behavior of the mixtures. A comparison of the material parameters obtained from uniaxial compression and indentation tests showed that indentation tests can be used in an easy and reliable way to obtain the fundamental asphalt parameters. Further, parameters found from indentation tests implicitly account for the confining conditions generated by the aggregate particles below the indenter.
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Acknowledgments
Support from the EPSRC Platform Grant awarded to the Nottingham Centre for Pavement Engineering (NCPE) is gratefully acknowledged.EPSRC-GB
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© 2007 ASCE.
History
Received: Nov 29, 2005
Accepted: Jun 5, 2006
Published online: Sep 1, 2007
Published in print: Sep 2007
Notes
Note. Associate Editor: Louay N. Mohammad
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