ABSTRACT
Two adhesion test methods were evaluated in a round robin test, the “Rolling Bottle Test” and the “Boiling Test”. Bitumen without and with liquid adhesion agent were used together with two stripping prone aggregates and two non-stripping aggregates.
The round robin test showed that both test methods can sort out good and bad aggregate-binder combinations. Combinations with intermediate adhesion had insufficient reproducibility. Both test methods showed a significant effect from the adhesion agent. The Rolling Bottle Test had acceptable precision for most of the aggregate-binder combinations and can be used e.g. in production control on raw materials. The Boiling Test had only acceptable precision for bad aggregate-binder combinations and may be used to identify problem materials.
