Hot Mix Asphalt Mix Design Evaluation Using the Corelok Vacuum-Sealing Device
Publication: Journal of Materials in Civil Engineering
Volume 17, Issue 2
Abstract
The bulk specific gravity of compacted hot-mix asphalt (HMA) specimens is the basis for volumetric property calculations during mix design and quality control and assurance. For many years, measurement has been accomplished by water-displacement procedures. Water displacement yields accurate for most conventional dense-graded mixes, but measurement errors using water displacement have been observed for coarser-graded mixes. Recently, vacuum-sealing technology, using the Corelok vacuum-sealing device has been shown to yield more accurate values. This study’s objectives were to illustrate differences between water-displacement and Corelok procedures and resulting changes in volumetric properties and design asphalt contents. Results indicate significant differences between Corelok and water-displacement procedures, with the Corelok procedure yielding slightly higher values, resulting in an average increase in design asphalt content and voids in the mineral aggregate of 0.29 and 0.64%, respectively, relative to water-displacement procedures.
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Acknowledgments
The authors would like to express their appreciation to the Mississippi Department of Transportation (MDOT) for its research sponsorship and desire to improve the quality of HMA pavements.
References
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Information & Authors
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Copyright
© 2005 ASCE.
History
Received: Feb 2, 2004
Accepted: Jun 15, 2004
Published online: Apr 1, 2005
Published in print: Apr 2005
Notes
Note. Associate Editor: Mary Stroup-Gardiner
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