UTW Behavior on Asphalt Pavements Tested with HWLS
Publication: Journal of Transportation Engineering
Volume 132, Issue 11
Abstract
The objective of this research is to evaluate how the physical properties and thickness of asphalt pavements influence behaviors of ultra thin whitetopping (UTW). The results of the three-dimensional finite-element method reveal that properties of asphalt and concrete layers, bonding between the two layers, and temperature strongly affect the distress of UTW. Based on results of FEM analysis, a wheel tracking device called the “heart wheel load simulator (HWLS)” was developed and used to perform an experiment to observe behavior variation in accordance with asphalt and concrete layer thicknesses as well as temperature. The results of HWLS simulation show that the effect of temperature is not significant and the increase of the tensile strain with the increase of a load is relatively small for a concrete layer, as compared to a concrete layer. In addition, for a concrete layer with a less than asphalt layer, the increased ratio of the tensile strain at the bottom of the concrete slab is significantly higher. Therefore, this research recommends that an at least asphalt layer after milling be required in order to apply UTW safely.
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References
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 132 • Issue 11 • November 2006
Pages: 880 - 887
Copyright
© 2006 ASCE.
History
Received: Mar 15, 2004
Accepted: Dec 20, 2005
Published online: Nov 1, 2006
Published in print: Nov 2006
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