Properties of Asphalt Concrete Layer Interfaces
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 3
Abstract
This note outlines the experimental investigation of the factors affecting bond development between pavement layers. The tests involved the use of an apparatus known as the Nottingham shear box. To establish a realistic stress distribution at the interface, which would facilitate the analysis of the test results, finite element models of bonded and weakly bonded specimens were developed. It was concluded that care must be taken when interpreting test results from the shear box experiments. Several materials and four interface conditions were investigated. Bond stiffness and strength were assessed under repeated dynamic and monotonic static test conditions. The analysis of the experimental results showed that the interface properties depend more seriously on the type of materials in contact, rather than on the amount of the applied tack coat and the interface condition. It was suggested that the interface bond should be described by introducing a vertical shear reaction modulus, as well as using the horizontal shear reaction modulus.
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Acknowledgments
The research presented herein was carried out at the School of Civil Engineering, Nottingham University, United Kingdom, under a contract financially supported by the Engineering and Physical Sciences Research Council (EPSRC), United Kingdom. The following organizations also provided support for the project: Aggregate Industries, Dynatest, Nottinghamshire County Council, Nynas, and Scott Wilson Pavement Engineering and Tarmac.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 3 • June 2006
Pages: 467 - 471
Copyright
© 2006 ASCE.
History
Received: Apr 27, 2004
Accepted: May 6, 2005
Published online: Jun 1, 2006
Published in print: Jun 2006
Notes
Note. Associate Editor: Shin-Che Huang
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