Description:
The Servo-pneumatic Universal Testing Machince
CRT-UTM-NU(Beam Testing Apparatus (AASHTO TP46/96)
& Vacuum Repeated Load Triaxle Test Apparatus)
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 equivalent to 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.
-
Assessment of resistance
to permanent deformation (rutting).
-
Measurement of stiffness
modulus.
-
Assessment of resistance
to fatigue cracking.
-
Resilient modulus of unbound
materials.
-
Mix design
- 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.
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