Test Standard Category

B041-28 GAM - Gyratory internal Angle Measurer

( Asphalt )

  • EN 12697-31
  • ASTM D7115
  • AASHTO T344

This Gyratory Angle Measurer has been designed by MATEST to provide an angle validating device which can be used by the operator to carry on the calibration of the Gyratory Compactor.

The device perfectly simulates a HMA specimen as it generates an equivalent tilting moment and shear forces.

GAM can cover a wide range of angles, including the ones specified by EN and ASTM Standards.

The device allows to perform TOP and BOTTOM angle measurements as specified by the Standards; the average of the obtained values is then considered as the “internal angle of the machine”.

An excel spreadsheet, which is supplied along with the device, is used for data acquisition and processing, and provides the precise value of the internal angle according to the calculation procedure specified by EN 12697-31 (Annex-C) and AASHTO T344.

The spreadsheet allows to plot several graphs showing the measured data and it also provides some important indexes about the quality of the data.

The device is supplied complete with:

  • Two different rings to perform tests either with M=240Nm or M=425Nm
  • Upper and lower base plate
  • RS232 cable
  • Strong practical suitcase
  • Calibration certificate

Request information

Gyratory Compaction

  • ASTM D6925
  • ASTM D7115
  • AASHTO T344
  • AASHTO T312
  • SHRP M-002
  • EN 12697-10
  • EN 12697-31
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