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TSRST-MULTI MULTI STATION THERMAL ASPHALT SYSTEM

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STANDARDS:
AASHTO TP10-1993 Standard test method for Thermal Stress Restrained Specimen Tensile strength
EN 12697-46:2012 Test methods for hot mix asphalt Part 46: Low temperature cracking and properties by uniaxial tension tests

MAIN FEATURES
Up to three working stations (electromechanical
and/or servo-hydraulic stations).
Servo-hydraulic actuator: 30 kN static, 25 kN
dynamic, double acting, fatigue rated and equal area
type with long life Labyrinth bearings & seals.
DynafloTM Hydraulic Power Supply: Variable
Frequency Drive 2.2 kW pump motor; Silent
operation.
Ability to clone, modify and/or generate user’s own
method file(s) to suit their specific requirements.
Programmable test Wizard to guide the operator
step by step based on a recipe book approach.
Temperature controller programmed via PC software.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTROL AND DATA ACQUISITION SYSTEM (CDAS)

Real Time Dashboard display shows transducer levels,
computed data and charted data before, during and after
the test has completed.
Dynamic image update feature shows visual image
representation of specimen failure Multi- axes
representation for clear visual presentation of test status for
each axes.
Very user friendly presentation simplifies specimen setup in
the machine.
The dashboard display feature of Testlab provides the user
with an intuitive visual representation of the current status

of both the machine and test method. The dashboard shows
live transducer level measurements along with nominated
key test data information and real time chart updates. This
feature is individually customisable for each method file.
Pavetest has already available dashboard designs for the
more sophisticated tests including multi station TSRST.

CONTROL:
High speed, (18 bit) digital servo-control, 4/6 axis.
Digital closed loop update sampling rate of 2.5 kHz.
Computer programmable, Proportional, Integral and Derivative
(PID) control algorithm.
Adaptive Level Control (ALC) algorithm for best dynamic peak
accuracy.
3 feedback control modes. E g. force, position and on-specimen
strain.
“Bumpless transfer” between control modes.
ACQUISITION:
Analog inputs are automatically calibrated on power up.
Simultaneous sampling of all channels.
16 Analog (±10 Volt) input channels.
Up to 64 times over sampling (set to 8 by default).
20 bit digital resolution (no auto ranging required).
Sampling rate up to 192,000 samples/see.

COMMUNICATION:
USB or Ethernet

ENVIRONMENTAL CHAMBER
REFRIGERATION RANGE: -40 °C to + 40 °C, capable of cooling at
a rate of 10 °C per hour.
Optional: -50 °C to + 40 °C version.

TECHNICAL SPECIFICATIONS
External dimensions load frame
(including environmental chamber):
1853(h) x 1020(d) x 1230(w) mm
Hydraulic Power Supply (for Servo-hydraulic station(s):
700(h) x 520(d) x 570(w) mm
Weight load frame: 200 kg approx. without the selected stations
configuration
Electrical requirement for:
Servo-hydraulic station (each): 230V 50-60Hz 1ph 2.2kW
Electro-mechanical station (each):
100-230V 50-60Hz 1ph 0.75kW
Refigeration unit: 380-420V 50Hz 3ph 2.5kW

Loading frame(s)
Rigid two column frame
Width of work space: 240 mm
Height of work space (between the two platens): 285 mm
Electro-mechanical actuator(s)
25kN static with ± 50 mm stroke (100 mm)
Internal displacement transducer

Servo-hydraulic actuator
30kN static, 25kN dynamic, double acting, fatigue rated, servo
hydraulic actuator, equal area type with long life seals & bearings
± 50 mm stroke (100 mm)
Internal displacement transducer
Close coupling of servo valve to actuator for best servo performance

10 μm pressure line filter at actuator for ultimate contamination
control
0.5 lt hydraulic accumulator with 40 Bar pre-charge for best
pressure line regulation at servo-valve.
High response, VCD direct drive, servo-valve: -3 db @ 350 Hz,
± 5% amplitude (performance curves available on request)
Load cell(s)
Low profile Precision Transducers load cell, ± 30kN, 0.1%.
Normalized output with in-line signal conditioning
Hydraulic power supply
Working pressure of up to 160 Bar (low pressure adjustable)
High/Low pressure selectable from control pendant
Variable flow rate up to 7.5 liter/min
Variable Frequency Drive (VFD) 2.2kW pump motor; speed based
on demand
3 μm return line filtration
Low oil, over temperature and dirty filter displayed
Remote starting
Pressure gauge
Air cooling (Electric fan)

Simple and easy to use gluing jig for preparing TSRST specimens.
The jig provides for perfect alignment and adjustment for different
sized specimens. The clamping force is easily set and ensures the
end plates are glued perpendicular to the specimen.

ORDERING INFORMATION
The basic MULTI TSRST includes the main frame, the CDAS, the
climatic chamber, the refrigeration unit and at least one between
the electro-mechanical or servo-hydraulic station. All available
configurations are summarized in the following table:

Note:
Multiple stations configuration (B282-11, B282-12, B282-14,
B282-15) allow to run tsrst tests with all stations simultaneously.
In this configurations, utst, rt, tct, utsst and utcst tests are performed
on one station at a time. With combined configuration
(electromechanical and servo-hydraulic) utcst must be performed
with servo-hydraulic station.

TO PERFORM
Uniaxial tension stress test (UTST)
Thermal stress restrained specimen test (TSRST)
Relaxation time, using the relaxation test (RT)
Tensile creep tests (TCT)
Uniaxial cyclic tension stress tests (UCTST)**
Uniaxial thermal stress & strain test (UTSST)***

** Only applicable to servo-hydraulic work station(s)
*** Additional hardware required

ACCESSORIES
B282-08 TSRST specimen gluing jig (needed)
B282-18 TSRST proof test assembly (optional)
Disk Shaped Compact Tension test:
B284-01 Disk-shaped compact tension test jig
B282-02 Rod ends (2 pieces needed)
B290-07 SCB deformation gauge (needed)
or
B290-12 Epsilon (model 3541) clip-on gauge cmod transducer
+1/-7 mm (Alternative to B290-07)
C090-18 Knife edge (pack of 24) only for B290-12

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