BS EN 13497: 2021 pdf download.Thermal insulation products for building applications一Determination of the resistance to impact of external thermal insulation composite systems (ETICS).
5.1 General For the test a steel ball is dropped from a specified height onto the surface of the test specimen (see Table 1). A second impact (rebound) by the ball shall be avoided.
5.2 Steel ball requirements Balls made of cutlery grade steel, AISI/SE Type 440 C and grade G100 according to ISO 3290-1 with the weights and nominal diameters given in Table 1.
5.3 Crack measuring gauge For measurement of the width of any cracks formed as a result of the impact of the steel ball onto the surface of the test specimen. The gauge shall be capable measuring from 0,1 mm and be graduated in steps of 0,05 mm.
5.4 Specimen support The support itself shall be flat, not bend, deform or absorb impact energy during the test, e.g. concrete support, in order not to influence the test result. The test specimen shall be firmly held to prevent movement during the test.圆 NOTE 1 Larger specimen tends to show less movement than smaller specimen. NOTE2 The specimen might be fixed, clamped or glued to the support so that contact between them is maintained during the test.
5.5 Optional tube to control descent of steel ball A vertical tube manufactured from a metal or rigid plastic can be used for this purpose with an inner diameter at least 2 mm larger than the steel ball diameter. The walls of the tube should preferably include regular perforated holes to prevent air within the tube becoming compressed due to the velocity of the ball during its descent and thereby acting as a "resistance cushion" to the impact of the ball with the specimen surface..
6 Test specimens
6.1 Preparation of a test specimen
The test specimen shall have the size/dimension to allow minimum 5 impacts taking into account the minimum distances according to 7.2. It consists of the thermal insulation product with the rendering system. It shall be prepared according to the system holders instructions.
2) reinforcement:
i) type, product name and manufacturer;
ii] DOP/CE-label, if available;
ii) mass per unit area of the reinforcement in gram per square metre;
iv) thread count in warp and weft per 100 mm or mesh dimensions of the reinforcement;
3) thermal insulating product:
i) type, product name and manufacturer;
i) DOP/CE-label, if available;
ii] measured apparent density according to EN 1602;
iv) measured tensile strength perpendicular to faces in dry conditions according to EN 1607;
f) test procedure, sampling, conditioning and test conditions:
1) pre-test history and sampling, e.g. who sampled and where;
2) dimension of the test specimen;BS EN 13497 pdf download.