The research specification Servopac is a fully automated, servocontrolled gyratory compactor designed to compact asphalt mixes. Compaction is achieved by the simultaneous action of static compression and the shearing action resulting from the mould being gyrated through an angle about its longitudinal axis. The Servopac allows you to set the required axial stress, gyratory angle and speed of rotation therefore enabling it to meet all the international gyratory compaction standards.