BS EN 826:2013 pdf free.Thermal insulating products for building applications Determination of compression behaviour.
BS EN 826 This European Standard specifies the equipment and procedures to be used when determining the compression behaviour of test specimens. It is applicable to thermal insulating products and can be used to determine the compressive stress in compressive creep tests and for applications in which insulation products are only exposed to short-term loads.The method can be used for quality control purposes. It may also be employed to obtain reference values from which design values can be calculated using safety factors.The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references,the latest edition of the referenced document (including any amendments) applies.EN 12085, Thermal insulating products for building applications一Determination of linear dimensions of test
specimens Iso 5725-1, Accuracy (trueness and precision) of measurement methods and results一Part 1: General principles and definitions ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results一Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method.A compressive force is applied at a given rate of displacement perpendicular to the major faces of a squarely cut test specimen and the maximum stress supported by the specimen calculated.In case of tapered products, the test specimens should be cut to obtain two parallel faces.When the value of the maximum stress corresponds to a strain of less than 10 %，it is designated as compressive strength and the corresponding strain is reported. If no failure is observed before the 10 % strain has been reached, the compressive stress at 10 % strain is calculated and its value reported as compressive
stress at 10 % strain.Test specimens shall be cut so that their base is normal to the direction of compression of the product in its intended use. The test specimens shall be cut by methods that do not change the structure with regard to that of the original product. The method of selecting the test specimens shall be as specified in the relevant product standard. In the case of tapered products, the parallelism of the two faces of the test specimen shall be in accordance with 6.1.BS EN 826 pdf download.