Surface Structuring of Wax in Complex Media
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 8
Abstract
Investigators over the past 16 years have considered the nature of surface structuring, referred to as bee structures, in bituminous asphalt, commonly identified by atomic force microscopy. Recently it has been suggested that the interaction between nonpolar molecules present in asphalt, including -paraffin waxes, are responsible for these surface microstructures. Several research groups now tend to agree that the interactions between crystallizing -paraffin waxes and the remaining nonwax asphalt molecules are responsible for much of the structuring, including bee-structures. To date, a plausible mechanism to explain the physicochemical manifestation of this type of surface structuring in asphalts has yet to be offered. In this paper a theory is presented that explains the physicochemical nature of surface structuring in asphalts and asphalt fractions based on investigations of simpler material systems reported in the literature pertaining to paraffin and polymer crystallization. Experimental results obtained over the past several years by the writers are presented in support of the theory presented.
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Acknowledgments
The writers gratefully acknowledge the Federal Highway Administration, U. S. DOT, for their financial support, through Contract No. DTFH61-07-D-00005 and DTFH61-07-H-00009.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 8 • August 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Aug 27, 2013
Accepted: Jan 14, 2014
Published online: Jan 16, 2014
Discussion open until: Sep 3, 2014
Published in print: Aug 1, 2015
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