BS EN 12370:2020 pdf free download.Natural stone test methods – Determination of resistance to salt crystallisation.
BS EN 12370:2020 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 12370:2020 describes a test designed to assess the salt crystallization resistance of natural stone where it is relevant. The test cannot be used in isolation and results will be considered with other physical tests to indicate durability; these include EN 12371″Determination of frost resistance”.
2 Normative references
he following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12407, Natural stone test methods- Petrographic examination;
EN 12440, Natural stone- Denomination criteria;
7 Preparation of specimens
7.1 Sampling
The sampling is not the responsibility of the test laboratory except where specially requested. At least six test specimens, which are considered representative of the body of stone being tested, shall be selected.
7.2 Dimensions of test specimens
Cubes of (40 ± 1) mm sides shall be prepared. Specimens shall be wet diamond sawn and any surface
irregularities removed by grinding.
7.3 Washing
All loose material shall be washed from the surface of the specimen using potable water.
10 Test report
The test report shall contain the following information:
a) unique identification number for the report;
b) the number, title and date of issue of this document;
c) the name and address of the test laboratory and the address of where the test was carried out if different from the test laboratory;
d) the name and address of the client;
e) it is the responsibility of the client to supply the following information:
— the petrographic name of the stone in accordance with EN 12407;
— the commercial name of the stone in accordance with EN 12440;
— the country and region of extraction;
— the name of the supplier;
— the direction of any existing plane ofanisotropy (if relevant to the test) to be clearly indicated on the sample or on each specimen by means of two parallel lines;
— the name of the person or organization which carried out the sampling;
— the surface finish of the specimens (if relevant to the test);