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K28495
Automatic Breaking Point Apparatus
The Automatic Breaking Point Apparatus tests bitumen samples according to the
conventional Fraass Method and also allows the user to modify the testing
procedure for research or other applications, such as determining the glass
transition temperatures of various materials or performing a fatigue test.
Utilizing Peltier cooling elements for the refrigeration of the test chamber,
the unit requires only a light, auxiliary refrigerant for additional cooling
down to –46°C (requires an external circulator) and avoids the use of a bulky
and energy-consuming cryostat. The instrument features user-friendly
operation. The sample-coated steel plaque is placed on the test support, and
then the unit will automatically clamp and adjust the plaque and then
determined whether the sample has been prepared properly in order to avoid
any faulty measurements. In addition, a two-line alphanumeric display provides
further instructions during a test.
In the Fraass Method routine, the instrument detects a distinct variation in
the applied bending force or a typical deformation in the force/temperature
curve. These striking force characteristics can even be recognized with
difficult-to-measure materials such as polymer-modified bitumens, where
ruptures of the sample coating cannot be observed visually. The initial
bending force parameter indicates whether the sample has been prepared
properly. For samples with a very low breaking point, a rapid cooling program
cools the sample chamber at an initial accelerated rate and then decreased to
the standard cooling rate during the actual test period. For samples where
the estimated breaking point is unknown, the search mode program will
determine an approximate breaking point by cooling the sample at a rate of
2°C/min and performing a bending test each minute. The instrument also offers
the possibility to change and store test parameters, such as bending speed,
cooling rate or bending intervals as separate user-defined programs. As an
alternative to the Fraass Method, the Fatigue Method cools the sample to a
specified temperature and then counts the number of repetitive bending
strokes required to fatigue or crack the sample. This method requires the
Breaking Point Windows® software for instrument operation and data
evaluation, and the test results can be graphed in real-time.
Specifications
Conforms to the specifications of: IP 80; DIN 52012; DIN EN 12593; NF T
66-026; JIS K2207
Included Accessories
Steel Test Plaques, pack of 10
Cleaning Brush
Dimensions lxwxh,in.(cm)
13x13.75x23.5 (33x35x60)
Net Weight: 26.5 lbs (12kg)
Shipping Information
Shipping Weight: 33 lbs (15kg)
Dimensions: 5 Cu. ft.
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