Bitumen/Aggregate Affinity-Rilem Round Robin Test on Rolling Bottle Test

摘要

Pavement durability is often linked with water damage either through raveling or loss of integrity, especially considering asphalt materials. A large number of tests exist to address the water sensitivity and affinity between aggregates and asphalt binder. In Rilem TC 237 SIB, TGI looked at the common test methods used to evaluate the adhesion or affinity of asphalt binder to aggregate surfaces. One of the main purposes was to run a Round Robin Test to evaluate the reproducibility and repeatability of these test methods and to give recommendations for improvement. Three asphalt binders were selected, two unmodified and a polymer modified binder and four aggregate types with different mineralogy. This paper presents the first results obtained for the rolling bottle test. The influence of aggregate type is higher than that of the asphalt binder. While there are some potential trends after 24 h comparing the different combinations of aggregate and binder, there is still a lot of variability in the absolute results. The underlining reasons are not yet clearly identified.