Gyratory Compactor
A high quality machine with which the user can easily and safely obtain accurate, repeatable results day after day

Gyratory compaction is considered to be one of the best methods of laboratory compaction for the assessment of compactibility and the manufacture of test specimens.
Compaction is achieved by the application of a vertical stress (normally 600KPa) via end platens to a known mass of asphaltic mixture within a 100 or 150mm internal Ø mould. The longitudinal axis of the mould is rotated (gyrated) at a fixed angle to the vertical whilst the platens are kept parallel and horizontal.
During compaction the height of the sample is automatically measured and both the mixture density and void content calculated. The compaction data is shown on-screen in graphical and tabular format as compaction progresses and it is also saved in Microsoft Excel™ compatible format. The operator can choose whether to compact for a certain number of gyrations or until a target mixture density or void content is achieved.

Problems with existing compactors are mainly related to build quality and ease of use. Unlike most compactors 100 and 150mm Ø moulds can be tested without changing machine parts. A filled gyratory compactor mould is heavy and often very hot. In many cases these moulds have to be lifted in and out of gyratory compactors. With the CRT-GYR no lifting of filled moulds is required. They are automatically lowered into position for compaction and then lifted up again for transfer to the integrated demoulding system.


  • EN 12697-10
  • EN 12697-31<
  • SHRP M-002 (Superpave)
  • AASHTO T312 (TP4)
  • T 0736-2011
  • Key Features

  • Complies with EN 12697-10 and EN 12697-31
  • Can be configured to comply with SHRP Superpave specifications
  • Automatic mould insertion and retraction
  • 150mm and 100mm internal Ø moulds can be tested without changing parts
  • Cold mix (emulsion) materials can be compacted and the expelled fluid collected
  • USB link with data acquisition and control system so that desktop can be used as host computer time
  • Compaction data stored in Microsoft Excel™ compatible format
  • Machine calibrated with traceable equipment
  • Option for mould up to 300mm high

  • Key Uses

  • Compaction of asphaltic paving material to a target mixture density or void content
  • Assessment of mixture compactibility
  • SHRP Superpave asphalt mixture design
  • Preparation of cylindrical test specimens

  • Software

  • User friendly, intuitive and reliable Windows™ software developed using LabVIEW™
  • Software allows 2 methods of compaction – no. of gyrations and target density
  • The operator is guided through every step of the compaction
  • Real-time display of current height, density and void content (percentage)
  • Data is recorded to disk at regular intervals for further analysis
  • Software communicates with the gyratory compactor via the USB interface
  • Utilities are included for transducer check, diagnostic routines and calibration

  • SpeedNormally 30 rpm
    StressNormally 600 kPa, Maximum 1000 kPa
    Actuator stroke mm250
    Internal Angle of Gyration0.2 to > 2°
    Electrical Supply¹220-240 Volts 50Hz @ 16A (others available)
    Specimen Ø7-10 bar @ 350 L/min
    MixturesWet or dry
    Dimension mm (WxDxH)780 x 1000 x 1920
    Working space required mm (WxDxH)2000 x 2000 x 2200
    Estimated Weight Kg508

    ¹ others available upon

    Calibration & Maintenance

    Calibration, Annual Service and Maintenance Contracts are available for this device. Please enquire for further details. Note: This device should be checked and calibrated annually.

    Accessories are not included in the price of main device (unless stated otherwise) and may be purchased separately if required.

    Photo? N.ACRT-GYR-M300
    Option for mould up to 300mm high
    Photo? N.ACRT-GYR-EXT
    Specimen Extruder
    Photo? N.ACRT-GYR-ANG2
    > 2 degree angle plate
    Shear force display
    Calibration kit for internal angle lead
    150mm Internal Ø mould & platens
    100mm Internal Ø mould & platens
    150mm Internal Ø mould & platens, slotted for emulsion mix
    100mm Internal Ø mould & platens, slotted for emulsion mix
    Photo? N.ACRT-GYRM-150T
    150mm Internal Ø mould & platens which includes feature for specimen temperature measurement
    Photo? N.ACRT-GYRM-100T
    100mm Internal Ø mould & platens which includes feature for specimen temperature measurement
    Photo? N.ACRT-GYR-TEMP
    Specimen Temperature Measurement
    Photo? N.ACRT-GYR-SP150_63
    Spacer 150mm to compact 63mm height on CRT-GYR
    Photo? N.ACRT-GYR-SP100_63
    Spacer 100mm to compact 63mm height on CRT-GYR
    Photo? N.ACRT-GYRCFP-150
    150mm circle filter papers (pack of 100)
    Photo? N.ACRT-GYRCFP-100
    100mm circle filter papers (pack of 100)
    Photo? N.ACRT-TGR-840
    Small air compressor
    Please complete the form below to download the datasheet






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