BS EN 12370 specifies a test method to assess the relative resistance of natural stones with an open porosity of greater than 5 %, measured in accordance with EN 1936, to damage caused by the crystallization of salts. The test is not necessary for low porosity stones.
BS EN 12370 on resistance to salt crystallisation is useful for:
To assess the durability of building materials to salt crystallisation, accelerated laboratory tests are carried out.
BS EN 12370 describes a test designed to assess the salt crystallization resistance of natural stones where it is relevant.
BS EN 12370 gives test procedures by means of ultrasonic velocity measurements, compressive strength measurements, and analysis of thin sections before and after salt exposure.
Overall, by means of ultrasonic measurements, it is possible to detect damage in stones exposed to salt crystallization cycles which show a tendency to less resistance of salt crystallization for more porous materials ensuring the durability of your buildings.EN 12370