ISO 16534-2020 pdf download.Thermal insulating products for building applications 一 Determination of compressive creep.
Test specimens shall not be layered to produce a greater thickness for testing.
The test specimens shall be cut squarely and have sides with the following recommended dimensions:
— S0mmx50mm;or
— 100 mm x 100 mm, or
— lSOmmxlSOmm;or
— 200 mm x 200 mm or
— 300mmx300mm.
The dimensions of test specimens shall be the same as used in the compression test as described in ISO 29469. These are specified in the relevant product standard or agreed between parties.
The linear dimensions shall be determined in accordance with ISO 29768, to an accuracy of 0,5 %.
The upper and lower faces of each test specimen shall be flat and parallel with a tolerance no greater
than 0,5 % of its side length, up to a maximum of 0,5 mm.
7.3 Number of test specimens
The number of test specimens shall be as specified in the relevant product standard. If the number is not specified, then at least three specimens shall be used for each compressive stress selected from 8.2.
NOTE In the absence of a product standard or any other technical specification, the number of specimens can be agreed between parties, provided the minimum requirement of three specimens are met.
7.4 Preparation of test specimens
The specimens shall be cut so that the direction of loading applied to the product will correspond to the direction in which the compressive forces are applied to the product in use.
The test specimens shall be cut by methods that do not change the original structure of the product.
lithe test specimen is not flat and parallel, it shall be ground flat and parallel or a suitable coating shall be applied to prepare the surface for the test. If a coating is applied, any creep which occurs within the coating shall be taken into account by deducting the creep of the coating.
Special methods of preparation, when needed, can be provided in the relevant product standard.
7.5 Conditioning of test specimens
The test specimens shall be conditioned for at least 24 h at (23 ± 2) °C and (50 ± 5) % relative humidity (RH). In case of dispute, the time for conditioning (equilibrium of moisture content) shall be as specified in the relevant product standard.
In tropical countries, the local environment can necessitate different conditioning and testing conditions. In such cases, the conditioning shall be performed at (27 ± 2) °C and (65 ± 5) % RH and be stated clearly in the test report.
8 Procedure
8.1 Test conditions
The test shall be carried out at (23 ± 2) °C and (50 ± 5) % RH.
Other conditions can be given in the relevant product standard or can be agreed between parties.ISO 16534 pdf download.