Fully electro-mechanical gyratory compactor GALILEO Research

A robust precision-engineered steel structure incorporating the EmS Electromechanical servo-actuation mechanism for vertical load application and "Orbital" proprietary gyration and mould rotation system (Patent pending) delivering highly accurate and repeatabletest results, together with stiffness and angle stability values that fall comfortably within the limits defined in EN 12697-31.


● High precision, robust load mechanism combined with an extremely rigid frame assures high accuracy and repeatability

● Load cell fitted directly on the vertical actuator for accurate load measurement and feedback control 

● User defined axial stress and speed of rotation

● Sliding transparent door with safety interlock

● Catch tray to collect expelled liquids using perforated moulds

● Fresh concrete configuration available

● Easy control using the integrated 7" colour touchscreen panel or connected PC

● User friendly PC software for data analysis and tests set up. Remote communication is available to receive immediate diagnostics

● Automatic data saving on USB or on Windows PC

● Lightweight yet robust moulds strictly comply with international Standards

● Safe and easy mould insertion and extraction with automatic lifting ensures low effort for the operator and higher productivity

● Simultaneous extraction of last specimen for higher productivity

● Easy specimen extraction with the integrated extruder

● Perfect gyratory angle with real-time closed loop automatic angle adjustment recovering compliance and minor strains independently from the vertical loads

● Easy and accurate motorised regulation of the gyratory angle set and displayed from the control panels

● Possibility to automatically set the zero angle at the end of the test

● Real-time direct shear and torque resistance measurement. Automatic calculation of the compaction energy, an important parameter for Research

● Automatic weight acquisition and density calculation with the integrated balance (optional)


A robust precision-engineered steel structure incorporating the EmS Electromechanical servo-actuation mechanism for vertical load application and "Orbital" proprietary gyration and mould rotation system (Patent pending) delivering highly accurate and repeatabletest results, together with stiffness and angle stability values that fall comfortably within the limits defined in EN 12697-31.

The large 7" user-friendly integrated touchscreen control panel shows the test graph in real time.

The on-board firmware includes nine languages and also offers the option to control the tests from a PC.

A traceable calibration certificate conforming ASTM and AASHTO Standards is also included.

Operating principle

Standard specify the method for compaction of cylindrical specimens of bituminous mixtures using a gyratory compactor. Such compaction is achieved by combining a rotary shearing action with a vertical static force applied by a mechanical head.

The method can be used for:

● Preparation of specimens of a given height at a predetermined density, for subsequent testing of their mechanical properties;

● Derivation of a curve of density versus number of gyrations;

● Void content for a given number of gyrations.

Standards apply to bituminous mixtures (made either in laboratory or from on-site sampling), with aggregates not larger than 37.5 mm. During operation the bituminous mixture is contained in a cylindrical mould (100 or 150 mm diameter). Compaction is achieved by the simultaneous application of a low-static compression and a shearing action, which results in the motion of the centre-line of the test piece, which generates a conical surface of revolution while the ends of the test piece remain approximately perpendicular to the axis of the conical surface.

ModelGalileo Research 78-PV20R0X
Consolidation pressure10 – 1000 kPa for 150 mm diam.

25 – 2200 kPa for 100 mm diam.
Gyratory motion and Vertical loadElectromechanical
Angle adjustmentEmS Electromechanical Servoactuation
Gyratory angle range0 -3° ±0.005
Gyratory angle measurementAngle measured and displayed during test plus closed loop control
Zero angle at the end of the testYes (automatic procedure, user selectable)
Speed of gyration5 – 60 rpm (120 on request)
Number of gyrations0 -9999
Integrated Shear measurementYes
Moulds dimensions100 and 150 mm diam., 250 mm height.
User interface7” 16:9 Touch screen color display(PC for data analysis)
ConnectionLAN - Ethernet
PC SoftwareIncluded
ExtruderIncluded (electromechanical)
BalanceAvailable as option with an accuracy of 1 g
Minimum specimen height50 mm
Maximum specimen heightUp to 200 mm depending on mix type
Height accuracyBetter than 0,1 mm
Suitable for water pouring testYes
Suitable for concrete/cement testingYes (on request)
Dimensions(w × d × h)480 × 900 × 2150 mm
Weight approx.420 kg


Galileo Research, fully Electromechanical gyratory compactor, including integrated extruder, shear measurement, EmS motorized regulation of the gyratory angle and displayed on the control panel, PC software for data analysis.

120/130 V, 50/60 Hz, 1 ph


Cylinder moulds and distance plates

Made from special alloy steel, hardened to 53-55 HRC, internally grinded, Ra less than 1 µm, fully conforming to EN 12697-31 and exceeding ASTM D6925 and AASHTO T312


Cylinder mould, 150 mm dia., complete with top and bottom plates.


Cylinder mould, 100 mm dia., complete with top and bottom plates.


Cylinder mould, 150 mm dia., with holes for cold mix compaction. Complete with top and bottom plates.


Distance plate, 150 mm dia., 50 mm high, for preparing short samples.


Distance plate, 100 mm dia., 38 mm high, for preparing short samples.


Accessories for compacting 100 mm diameter specimens, including 100 mm height calibration device

Internal angle measurement apparatus


ILS internal angle measurement apparatus

Galileo systems include a smart controller with a wide 7" 16:9 colour touch screen control panel. An intiutive and user friendly graphical interface with clear, high contrast design pictograms allows for:

● User to input of test parameters, choosing from preset pattern related to relevant standards or user customizable patterns. The servo-controlled operation of the machine allows vertical strss, rate of gyration and gyratory angle (Research version only) to be quickly modified from the control panel of the PC

● Displaying and plotting either height, load, density, hear stress, angle and compaction energy against gyratory cycles in real time. Test data may be stored and retrieved or transferred to other software analysis packages

● Calibrating of transducers with a highly accurate interpolation to assure the most precise data acquisition

● Diagnostic features to quickly check all the machine devices; moreover, the LAN/Ethernet communications port allows for direct remote connection via the intranet or internet for an immediate diagnostic analysis from manufacturer.

The software includes a wizard guided mode to help and assist the operator throughout the compaction procedure steps.

Standard requirementEN 12697-31ASTM D6925 D7115Galileo performance

Internal angle (stability factor)0.82±0.02°1.16±0.02°EN 0.82±0.01°

ASTM-AASHTO 1.16±0.01°

Research version

EN 0.82±0.005°

ASTM-AASHTO 1.16±0.005°

Parallelism factor δTB = ITA-IBA< 0.10°Not req.< 0.04°
Full rotation factor(δ max-min)< 0.05Not req.< 0.01
Deflection factor(δ lh=IEA240-IEA425)< 0.10°Not req.< 0.070°

Research version < 0.060°
Vertical pressure or force precision±250N (Ann.A)600±18 kPa< 2% target load

600±18 kPa (B C)

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