Mineral aggregates are characterised by the existence of permeable voids, which can be accessible for asphalt binders during production of asphalt mixes. The standard description says, that the volume absorption of binder is 1/3 of the volume of external (accessible) voids in aggregate. This mean, that the porosity of 1,5% (V/V) will cause the maximum absorption of binder on the level of 0,5% (V/V) or 0,2% (m/m). In the polish Technical Requirements (WT-2 2010), concerning determination of asphalt mixes properties, there is not existing the procedure concerning absorption of binder by aggregate.