Jocelyne Abreu, Anton Paar
PAPER
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Abstract
In a world where the supply of bitumen and other road building materials is continually changing and the quality and chemical makeup is not consistent, it becomes ever more important to understand how these materials will interact with one another.
Electrophoretic Light Scattering is a powerful tool used to understand the surface interaction between the dispersed and continuous phases of an emulsion or suspension, by means of zeta potential. We can understand and optimise concentrations of emulsifiers and additives that may affect the stability of bituminous emulsions, allowing a high-quality product with minimum use of these expensive additives.
The streaming potential technique allows us to measure the zeta potential of aggregate and other road building materials. Quantifying the cationic or anionic state of an aggregate can also assist in designing the most suitable bituminous emulsion for strong adhesion to the aggregate. Quantitatively understanding how each layer of the pavement interacts with the other layers can allow us to understand overall performance, as we would be able to predict potential repulsive and adhesive properties between the layers.
About the Author
Jocelyne has a BSc (Hons) in Applied Chemistry from the University of Pretoria. She joined Anton Paar Southern Africa in 2013 as a Sales Specialist for Rheology and was promoted to Product Manager for Rheology in 2015. Since 2018 she has overseen the Characterization team as Business Unit Manager.
