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CDF-CIF-Freeze-Thaw-Tester

Freeze-Thaw-Resistance

Durability is, beneath the strength, one of the most important properties of concrete. It depends on the type of building and the environmental conditions. it is especially in road construction that a high resistance to freeze-thaw cycles is of major importance and is thus one of the major criteria in testing.The CDF-/CIF test set-up enables the freeze-thaw test to be carried out in accordance with CDF recommendations from RILEM. The advantage of this test method is in the very good reproducibility of the results that are given. With this test procedure,  the weathered quantity of a surface is measured by a number of freeze-thaw cycles. The test specimens are thereby placed in a solution of sodium chloride to stress the surface. The result gives an estimate for the resistance to freeze-thaw cycling for the concrete being tested.  

Improvements of the new model /3

Schleibinger is building the CDF freeze/thaw tester since 1994, The development of this machine is based on a contract with the the inventor of the procedure and machine Prof. M.J. Setzer, University of Essen, Germany.


The most important improvements of the new machine:

  • A big colored TFT-display with touch screen for the graphical display of the temperature recordings

  • New controller with self-test functions and and a easy to use human-machine interface

  • Internet and network interface for controlling the machine from every PC word wide

  • Silent due to the hermetic encapsulated scroll type cooling machine, and a noise insulated machine housing

  • Two reliable, high quality redundant magnetic valves with low voltage control.

  • Self test of all liquid levels, coolant low and high pressures, over-temperature and supply voltages

  • Automatic circuit breakers for each electrical component

  • Redundant semiconductor and mechanical switch for the electrical heating unit.

  • All tubes and valves are Armaflex® isolated to keep dry during freeze thaw cycles.

  • All wet parts made of stainless steel, copper or brass

  • Basic construction made of powder coated aluminum




 

Test Procedure

 

Preparatory work begins seven days after casting the specimen. 

The test specimens are stored in a climatic chamber at a temperature

of 20 °C ( 2 °C and a relative humidity of 65 % ( 5 %.

The side faces of the test specimens are sealed five days before the end

of dry storage using aluminum foil and butyl adhesive.

 

Capillary suction commences after the 28th day and continues for seven days,

hereby the increase in weight by the test specimens is measured after 

2, 3, 4 and 7 days. Capillary suction is then followed by freeze-thaw- cycling in

the CDF chest. The quantity thereby weathered is measured after 4, 14 and 28 days.

 

Standards

Also prepared for the following standards :

  • CDF RILEM TC 117 FDC

  • CIF RILEM TC 176 IDC

  • Cube Test

  • DIN 4226

  • DIN 52104

  • USA ASTM C666-2008 Procedure A

  • CEN/TS prEN-12390-9

  • EN 13581

  • CEN/TR 15177 2006-06

  • Önorm 23303 XF1 resistance

 

Technical Data

 

test cab dimensions (WxL)

171 x 55 cm

for 10 container GN-B 1/2 or 15 containers GN-B 1/3

temperature range

-20°C to 20 °C

max. temp. deviation

< ( 0,5 K

dimensions (LxWxH)

225x95x120 cm

required room (LxW)

350x160 cm

power

6 kW

required fuse

3 x 32 A

weight

550 kg

environment conditions

10 .. 26 °C, max. humidity 60 %

 

Resoureces 

Data Sheet

A presentation about the machine and the test procedure

User Manual

Video about the CDF test

Installation and first setup of the CDF machine

 

Last edited: May 11, 2020, 09:13

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