prEN 12697-31 rev

Bituminous mixtures - Test methods - Part 31: Specimen preparation by gyratory compactor prEN 12697-31 rev

Scope

This European Standard specifies the method for compaction of cylindrical specimens of bituminous mixtures using a gyratory compactor. Such compaction is achieved by combining a rotary shearing action and a vertical resultant force applied by a mechanical head.
The method is used for:
a) determination of the air voids content of a mixture for a given number of gyrations or derivation of a curve density (or void content) versus number of gyrations;
b) preparation of specimens of given height and/or at a predetermined density, for subsequent testing of their mechanical properties.