This standard defines an indirect test method (determination of water absorption) for the determination of the frost resistance of burnt-clay roofing tiles in the internal control.
DIN 52251-2:1987 history
1987DIN 52251-2:1987-04 Indirect methods of determining the frost resistance of roofing tiles; determination of water absorption
1987DIN 52251-2:1987 Indirect methods of determining the frost resistance of roofing tiles; determination of water absorption