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The Servo-Hydraulic Universal Testing Machine (CRT-UTM-HYD) is a well designed, inexpensive machine specifically developed for the testing of materials used in pavement construction. A motorized, adjustable crosshead reduces the time between test setups. The programmable temperature cabinet provides the possibility to perform frequency/temperature sweeps. Accurate waveforms are digitally generated and applied by the actuator producing repeatable conditions that are simulative of those created by moving or static vehicles. The actuator is double-acting allowing both compressive and tensile forces to be applied. Various systems are available for the measurement of the 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
- DD226
Simple Performance Tests:
- Flow number
- Flow time
- NCHRP9-19; NCHRP9-29
Fatigue:
- EN 12697-24 Annex E
- ASTM D7313 DCT (Disc shaped compact tension test)
- EN 12697-44 SCB (Semi circular bending test)
Chinese Tests:
- Bending; Creep; Splitting Test
- T 0738-2011
Unbound Materials:
- AASHTO T307 (previously TP46)
- NCHRP 1-28A
Key Features
- Designed to perform a range of tests on asphaltic paving materials, sub-grade soils and granular sub-base materials
- Double acting fatigue rated hydraulic actuator with integral stroke transducer
- Utilises Star servo valve with ‘Sapphire Technology’
- Motorised adjustable lower crosshead with automatic hydraulic frame clamping
- Integral programmable temperature controlled cabinet
- 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
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
For more information visit: .uk/shop/asphalt-testing/servo-hydraulic-universal-testing-machine/
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