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Evaluating surface energy components of asphalt binders using Wilhelmy Plate and Sessile Drop Techniques
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this Study, the surface energy was investigated for six penetration grade

70/100 bitumen binders. Wilhelmy Plate and the Sessile Drop were used to

determine the contact angles.

The purpose of this study was to compare the Wilhelmy Plate method with the

Sessile Drop method, and to compare the significance of Owens-Wendt model

with the significance of Acid Base model by correlating surface energy

components. Better R2 –values were found for surface energy components by

using the Owens-Wendt model than by using the Acid Base model. It was

concluded here that Owens-Wendt model is a better model for determining

surface energy components of bituminous binders than the Acid Base model

since bituminous binders have low energy surfaces.

For both instruments: When using Diiodomethane as a probe liquid the biggest

variations among the binders were observed. When using water as a probe

liquid the least variations among the binders were observed.

The advancing contact angles for water determined for these six bitumen

binders using the Wilhelmy plate method do not exceed the 90 degree by

much, suggesting that bitumen is not extremely hydrophobic.

The Sessile Drop method offers a faster and more convenient way to measure

the surface energy components of bitumen binders than the Wilhelmy Plate



Place, publisher, year, edition, pages
2012. , 40 p.
TSC-MT, 12-034
Keyword [en]
Asphalt binder, Adhesion, Surface energy, Bitumen surface
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-117463OAI: diva2:601925
Available from: 2013-01-30 Created: 2013-01-30

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