Influence of Recycled Asphalt Pavement on Fatigue Performance of Asphalt Concrete Base Courses
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 6
Abstract
This paper presents the physical properties of recycled asphalt pavement (RAP) and its influence on the mechanical performance of a binder course asphalt pavement mix. A series of binder course mixes were designed containing varying percentages of RAP. A mix made from only virgin material was selected as the control mix for the investigation. The effect of introducing RAP into the binder course mix was evaluated through a series of laboratory tests including the Marshall test, the indirect tensile stiffness modulus test, the indirect tensile fatigue test and the water sensitivity test. A circular wheel track (CWT) was developed in order to study the dynamic effects of a rolling wheel traveling over an asphalt pavement. The CWT was commissioned within a temperature controlled room along with a customized data acquisition system. The system involves the testing of rectangular slabs and allows for the investigation of dynamic tensile strain. The laboratory tests have shown that the introduction of RAP to the binder course mix resulted in an improvement in all mechanical properties. In particular, it was found that the mix containing up to 30% RAP, displayed improved fatigue resistance relative to the control mix manufactured from virgin materials.
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Acknowledgments
The writers wish to thank Mr. Tom Webster, University College Dublin for his assistance with the laboratory testing, Enterprise Ireland (ATRP\02\413) for providing funding for this research, Roadstone Dublin Ltd. for supplying raw materials, Shell Bitumen Ireland for supplying the bitumen, and Dr. Anton Hartman, Africon Engineering International for providing advice during the CWT test design.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 6 • June 2010
Pages: 643 - 650
Copyright
© 2010 ASCE.
History
Received: Dec 16, 2008
Accepted: Jan 29, 2010
Published online: Feb 1, 2010
Published in print: Jun 2010
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