Bitumen Surface Energy Characterization Using a Contact Angle Approach
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 6
Abstract
The ability to quantify adhesion based on surface energies of the bitumen and aggregate components enables selection of compatible materials and quantitative assessment of moisture susceptibility. Reliable surface energy characterization is required in order to implement this technology successfully. One proven method to estimate bitumen surface energy is to calculate it using contact angles measured with various liquids. However, improper selection of probe liquids or interpretation of resulting data can easily mislead users into drawing inaccurate conclusions. This paper presents a refined test method and analysis procedure customized to estimate bitumen surface energy using contact angles measured by the Wilhelmy plate. Results for five neat and three modified bitumen are presented and results are interpreted to study the relationships between contact-angle based surface energies and damage in hot mix asphalt. In a separate study by Bhasin et al. in 2004, surface energy characteristics of bitumen determined using methods described in this paper were combined with surface energies of aggregates to successfully predict moisture susceptibility of mixes.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 6 • December 2006
Pages: 759 - 767
Copyright
© 2006 ASCE.
History
Received: May 23, 2005
Accepted: Dec 6, 2005
Published online: Dec 1, 2006
Published in print: Dec 2006
Notes
Note. Associate Editor: Louay N. Mohammad
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