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I. Camargo, B. Hofko, J. Mirwald et al.:
"Anti-aging additives: proposed evaluation process based on literature review";
Road Materials and Pavement Design, 1 (2021), ##.

Asphalt binder ageing alters its chemical and physical properties in a manner to make it brittle and more susceptible to thermal and fatigue cracking.
The ageing rate of asphalt binders depends on a combination of differentfactors related to their chemical composition, environmental conditions
and mix design. In order to prevent ageing, anti-ageing additives are used.
The selection of the optimal additive should follow an iterative process. The
additive choice is made concerning each case studied. Then, the selected
modified asphalt binder is short-term aged by RTFOT and long-term aged
by PAV and ultraviolet (UV) weathering. Rheology performance parameters
are measured by DSR and BBR before and after ageing. Consequently, ageing indices are calculated to evaluate the appropriateness of the additive.
The paper discusses several findings on the rheological level accordingly
to the literature. Finally, a process is proposed to harmonise the research
and the engineering practices in studying anti-ageing additives effects on
asphalt binders.

Anti-ageing additives; asphalt binder; ageing; rheology; process

http://dx.doi.org/10.1080/14680629.2021.1906738

https://publik.tuwien.ac.at/files/publik_295956.pdf