Freeze-thaw resistance of concrete products
New research findings
The freeze-thaw resistance of concrete paving blocks must be verified by the slab test (DIN EN 1338). Sometimes clients in Germany demand the CDF method (DIN CEN/TS 12390-9). Independent of the test method used there are some discrepancies between the laboratory test results and the real-life behavior of paving blocks installed. It is, for example, reported that there were some cases in which the facing layer of installed concrete paving blocks detached from the core concrete after only a few winter seasons despite the fact that these products had previously passed the CDF tests. Within the...
