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Surface Free Energy of Asphalt Binder as Parameter to Evaluate Moisture Susceptibility of Asphalt Mixtures Used in The State of Kansas

Nguyen, Duc Minh Huy
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Abstract
Moisture damage in asphalt pavements leads to premature failures that incur significant maintenancecosts. Traditional mechanical tests, while common, lack consistency, repeatability, and correlation with field performance. This research aims to develop a comprehensive database of surface free energy (SFE) values for modified and unmodified asphalt binders used across Kansas. Surface free energy testing will be performed using the Wilhelmy Plate method at the University of Kansas, with a subset validated through Sessile Drop measurements at Kansas Department of Transporta tion (KDOT) facilities. By applying and comparing multiple SFE calculation models, including Owens–Wendt–Rabel–Kaelble (OWRK), Lifshitz–van der Waals and Acid–Base (LW/AB), and Equation of State methods, this project will establish a reliable, efficient alternative to traditional moisture susceptibility evaluations. The resulting database and analysis will support the selection of moisture-resistant binder–aggregate pairs, improve asphalt pavement durability, and provide a foundational resource for future specification and design guidelines.
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2025-12-31
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University of Kansas
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This item contains archived web content.
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Keywords
Asphalt Binder, Contact Angle, Energy Ratio, Moisture Susceptibility, Surface Free Energy, Wilhelmy Plate
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