Pavement Design Model for Unbound Granular Materials
Publication: Journal of Transportation Engineering
Volume 130, Issue 5
Abstract
The paper reports the results of several repeated load triaxial tests performed on a crushed rock aggregate at different stress levels. The development of the resulting permanent deformation that accumulates with the repeated loading is described and compared with the types of responses usually described by the shakedown approach. It is shown that the existing shakedown approach can describe some, but not all, of the observed responses. Thus a modified set of possible responses is defined in shakedown terms and some explanations of the differences from the conventional approach are given. The elastic shakedown limit can be used to predict whether or not stable behavior occurs in the unbound granular material layer of a pavement construction or whether rutting will occur. With this information a pavement’s granular base may be dimensioned. The elastic shakedown limit of a Granodiorite has been used in this manner and the resulting design compared with an empirical German design procedure. The paper concludes with an assessment of the benefits and limitations of the new approach.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 130 • Issue 5 • September 2004
Pages: 665 - 674
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Jun 16, 2003
Accepted: Aug 18, 2003
Published online: Aug 16, 2004
Published in print: Sep 2004
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