Servo-Pneumatic Universal Testing Machine
description : 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.
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.
features :
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; EN12697-25, 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 andAASHTO 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
specification :
| 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 (WxDxH) | 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 |
| Estimated Weight Kg | Frame 30 Control box 6 |
| PC | Included |
