NEN EN 12697-31 : 2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions, symbols and abbreviations
  3.1 Terms and definitions
  3.2 Symbols
4 Principle
5 Apparatus
  5.1 Test device
  5.2 Metallic moulds
  5.3 Round metallic inserts
  5.4 Device for measuring the distance between inserts
  5.5 Device for counting the number of rotations to within
      one revolution
6 Preparation of specimens
  6.1 Mass of mixture to be introduced in the mould
      6.1.1 Preparation of specimens of a given height at a
            predetermined bulk density
      6.1.2 Derivation of a curve density versus number of
            gyrations
  6.2 Preparation of test pieces
7 Test procedure
  7.1 Preliminary setting
      7.1.1 Pre-load
      7.1.2 Force F
      7.1.3 Setting of the angle of inclination
      7.1.4 Speed of rotation
      7.1.5 Test temperature
  7.2 Compaction of specimens
      7.2.1 Start of compaction
      7.2.2 Preparation of specimens of a given height at
            a predetermined density
      7.2.3 Derivation of a curve density or void content
            versus number of gyrations
8 Test report
9 Precision
Annex A (normative) Procedure for setting the gyratory-type
                    angle and the type conformity (force F
                    is fixed)
  A.1 Gyratory-type testing procedure
      A.1.1 Central reference materials for gyratory-type
            testing
      A.1.2 Gyratory-type angle test
  A.2 Procedure to test the conformity of a gyratory compactor
      to a type
  A.3 Summary of the gyratory calibration chain

Defines the method for compaction of cylindrical specimens of bituminous mixtures using a gyratory compactor.