Durability

Durability is, beneath the strength, one of the most important properties of concrete.  

Beneath the freeze-thaw resistance also the ASR resistance comes more and more in the public focus. 

Schleibinger is producing and delivers the 

• The CDF Tester
• The Slabtester
• The ASR Reactor
• The Soil-Freeze-Thaw-Tester

according to several European, US and other  standards.

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Since March 2017  DIN CEN/TS 12390-9 DIN SPEC 91167 is available as a supplement to DIN CEN/TS 12390-9:2006-08.

Important changes / additions:

• The CO2  content in the climat chamber must be measured, recorded and kept at the daily mean value in the range of 300 ppmv to 1,100 ppmv in order to enable carbonation. This measurements are required for all 3 tests the Slabtest, the CDF/CIF test and the Cube test.
• Brush for removing of loose material is specified:

(available from Schleibinger)

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Not well known yet is the standard CEN/TR 15177 2006-06
Testing the Freeze-Thaw Resistance - Inner Damage

Die Freeze Thaw test may be done with 3 different procedures: 

• freezing on air, thawing under water (= Slabtester with option natural stone test)
• Slabtest
• CDF/CIF Test

The inner damage is  measured by the ultrasonic test, the resonance frequency test, or the length change. 

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CDF Standard , English

CIF Standard, English

Rilem-Server

A presentation about the CDF machine and the CDF and CIF test procedure