Estimation of RAP’s Binder Viscosity Using GPC without Binder Recovery
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 4
Abstract
The binder viscosity in a reclaimed asphalt pavement (RAP) is usually measured from the recovered binder. To recover the aged binder from RAP, there must be a series of laboratory process which takes at least a day or two. This study was initiated to determine the possibility of estimating absolute viscosity of aged binder (in RAP) within a short time by using gel-permeation chromatograph (GPC) technique. Many studies have shown that the GPC profile has a good correlation with physical properties of binder. To apply this concept, GPC tests were run on the samples from RAP mixtures without recovery. Statistical analysis indicated that absolute viscosity of the binder in an asphalt mixture could be reasonably estimated from the GPC test. The value of the absolute viscosity with large molecular size was as high as 0.95 for unmodified asphalt and 0.9 for polymer-modified asphalt binder.
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Acknowledgments
This study was supported by the Center for Advance Mineral Aggregate Composites, Kangwon National University, Chun Cheon, South Korea, and by Asphalt Rubber Technology Service in Clemson University, Clemson, S.C.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 4 • August 2006
Pages: 561 - 567
Copyright
© 2006 ASCE.
History
Received: Jul 27, 2004
Accepted: Feb 23, 2005
Published online: Aug 1, 2006
Published in print: Aug 2006
Notes
Note. Associate Editor: Carl Liu
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