Rheological and chemical properties of field aged binders and their variation within the wearing course

Field ageing is investigated based on recovered binders. Fifteen sections were considered, consisting of unmodified and polymer-modified binders (PmB). Binders from the wearing course, after slicing cores horizontally. To assess field laboratory tendencies, compared to a set reference binders, tested before ageing. For three sites, bottom slices long-term aged properties top slices. Stiffness-based rheological parameters showed good relations carbonyl index. induced same trends, but often turned out be more severe. It was shown, for sections, that standard test applied not enough reach levels Finally, relation between vertical profile void content corresponding asphalt mixtures observed.