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Servo-Pneumatic Universal Testing Machine

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Rapid determination of modulus, permanent deformation and fatigue of bituminous mixtures using cylindrical specimens that are cored from the highway or prepared in the laboratory

This machine is a development of the NAT which was developed by Keith Cooper and Professor Steven Brown at the University of Nottingham. The use of a high precision servo-pneumatic valve in conjunction with a low-friction actuator and sophisticated data acquisition and control, results in a performance that is equal to many servo-hydraulic systems.

Accurate, digitally generated waveforms are applied by the actuator producing repeatable stress variations in test specimens that are simulative of those in a road pavement due to moving traffic. The actuator is double-acting allowing both compressive and tensile forces to be applied. A triaxial cell system is available for the measurement of the resilient modulus of unbound materials.


Standards

Modulus:
  • EN 12697-26 Annex C
  • EN 12697-26 Annex D & E
  • ASTM D7369
  • ASTM D4123
  • ASTM D3497
  • AASHTO TP31
  • AASHTO TP62 / TP79
Permanent Deformation:
  • EN 12697-25 Methods A & B
  • Fatigue:
    • EN 12697-24 Annex E
    • ASTM D7313 DCT (Disc shaped compact tension test)
    • EN 12697-44 SCB (Semi circular bending test)
    • Simple Performance Tests:
    • Flow number
    • Flow time
    • NCHRP9-19; NCHRP9-29


    Unbound Materials:
    • AASHTO T307 (previously TP46)
    • NCHRP 1-28A

Key Features

  • Low cost dynamic loading universal test system ideally suited to testing asphalt and unbound granular materials
  • Double acting low friction actuator with integral stroke transducer
  • Utilises high performance ceramic spool servo-valve
  • High quality stainless steel frame
  • Issued with UKAS accredited certificate of calibration for EN 12697-24; EN 12697-25, EN 12697-26
  • Accessories available to perform a range of standard and non standard test methods
  • Can be supplied with standard software to perform EN, ASTM and AASHTO test methods and universal software with which to design non standard test routines


Key Uses

  • Assessment of resistance to permanent deformation (rutting)
  • Measurement of stiffness modulus
  • Assessment of resistance to fatigue cracking
  • Resilient modulus of unbound materials
  • Mix design

cDAC – ADVANCED DATA ACQUISITION SYSTEM

  • 20 bit resolution, 5kHz per channel
  • Will accept any voltage transducer in any channel using TEDS Thermocouples
  • 1024 data points per cycle
  • Up to 16 digital input & output channels
  • Ethernet/USB/RS232 to PC communication

cDAC LIGHTS ON

Software

  • User friendly, intuitive and reliable Windows software developed using LabVIEW
  • Standard test software available to meet specific EN, ASTM and AASHTO test methods
  • Universal test software for the development of test methods using static, sinusoidal, haversine, square, triangular with user selected frequencies and data collection rates
  • Stored test data can be imported into a spreadsheet package to be analysed by the user
  • Utilities are included for transducer check, diagnostic routines and calibration

DIMENSION-Software

*cDAC & Dimension optional. Please enquire for details.

Accessories

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


CRT-TCC Temperature Controlled Cabinet for UTM-NU
CRT-ITSMFAT-SET Indirect tensile stiffness modulus and fatigue measurement system to perform EN 12697-26 (Annex C) EN 12697-24 (Annex E) Ø100&150mm specimens.
CRT-ITSM-SET Indirect tensile stiffness modulus measurement system to perform EN 12697-26 (Annex C) Ø100&150mm specimens.
CRT-FAT-SET Indirect tensile fatigue measurement system to perform EN 12697-24 (Annex E) for Ø100mm specimens. To be used with CRT-ITSM-SET.
CRT-FAT-SET100_150 Indirect tensile fatigue measurement system to perform EN 12697-24 (Annex E) for Ø100mm specimens. To be used with CRT-ITSM-SET.
CRT-FAT-SET150 Add-on for CRT-FAT-SET for 150mmØ specimens. To be used with CRT-ITSM-SET and CRT-FAT-SET.
CRT-PD-SET Dynamic and static creep measurement system to perform EN12697-25 (Method A)
CRT-PRESTRIAX-SET Dynamic and static creep measurement system – confining stress to perform test according to EN 12697-25 Method B.
CRT-IT-RESMOD Resilient modulus test system to perform AASHTO TP31 and ASTM D4123
CRT-IT-D7369 Resilient modulus test system to perform ASTM D7369
CRT-INDTENS-CREEP Indirect Tensile Creep measurement system according to AASHTO T322
CRT-DTC-NU Direct Compression & Tension Measurement System to perform test according to EN 12697-26 Annex E for CRT-UTM-NU
CRT-T307 Triaxial system to perform AASHTO T307 for Ø200x100mm specimens of unbound materials
CRT-T307+ Triaxial system to perform AASHTO T307 for Ø200x100mm and Ø150x300mm specimens of unbound materials. To use with CRT-UTM-NU pillar extensions are required.
CRT-T307-EXTRA Additional parts to upgrade from T307 to T307+
CRT-NU-PILLAR-LG Larger Pillars for UTM-NU (for CRT-T307+)
CRT-SPTLV Test system to perform dynamic modulus according to AASHTO TP62, SPT flow number (NCHRP 9-19), SPT flow time (NCHRP 9-19)
CRT-INDTENS-CREEP Indirect Tensile Creep measurement system according to AASHTO T322
CRT-PUMA PUMA – Precision Unbound Materials Analyser for 150mmØ specimens
CRT-UTM-SCB Semi circular bending system to perform EN 12697-44 SCB test
CRT-MEM100 Neoprane membrane 100mm Diameter 400x1mm – set of 10
CRT-MEM150 Neoprane membrane 150mm Diameter 420x1mm – set of 10
CRT-MEM100WH Membrane 100mm Diameter 400×0.35mm – set of 10
CRT-MEM150WH Membrane 150mm Diameter 420×0.35mm – set of 10

Specifications

Technical specifications are subject to change without notice.


Models Available 220V 50/60Hz 1ph
110V 50/60Hz 1ph
Maximum Load Electronically limited to 15.5kN
Load Transducer ±20kN
Actuator Stroke mm 30
Frequency Hz 0 to 30
Electrical Supply¹ 220-240 Volts 50 Hz @ 13A
Compressed Air 7-10 bar at 600 L/min
Dimension mm (W x D x H) Frame 360 x 400 x 740
Control Box 360 x 280 x 140
Working space required mm (WxDxH) 825 x 1650 x 2100 when fitted in cabinet CRT-TCC
Weight (approx.) Kg Frame 30
Control box 6
PC Included

¹ others available upon request

Calibration & Maintenance

Calibration, Annual Service and Maintenance Contracts are available for this device.
UKAS accreditation to satisfy typed testing as described in EN 13108.
Please enquire for further details.
Note: This device should be checked and calibrated annually.