Pavement

This test method is applicable to all binders that do not have a viscous response at 70°C and at long loading times when confined to film thicknesses in the range 0.1 to 1mm. It is applicable to all modified binders.

Crumb rubber modified binders (primarily used in sprayed works), are manufactured from particulate crumbed rubber dispersed in a bitumen binder. These dispersions, when tested using the current set of specification test methods perform in a manner similar to the moderately modified classes of PMBs. In practice their performance is reported to be at a significantly higher level. This is thought to be due to the rubber particles acting across the thinner gaps associated with real surfacings.

This test method is not designed to indicate a performance related property but provide a measure of the contribution made by the rubber as distinct from the traditional homogeneous systems at low binder film thicknesses.