BS EN 13497:2018+A1:2021 pdf download.Thermal insulation products for building applications – Determination of the resistance to impact of external thermal insulation composite systems (ETICS).
For the purposes of this document, the terms and definitions given in EN ISO 9229 and EN 17237 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4 Principle
The impact resistance of a design ETICS kit is the hard body impact resistance, determined by means of a steel ball falling onto the surface of the kit. The energy level and corresponding dropping height is selected from Table 1. Any damages occurring are visibly assessed (e.g. the reinforcement has become visible from the external surface, the finishing coat or the rendering system has visibly delaminated or been perforated) and cracks widths are measured.
5 Test apparatus
5.1 General
For the test a steel ball is dropped irom a specified iieight onto tne surtace 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. Ei The test specimen shall be firmly held to prevent movement during the test.
NOTE 1 Larger specimen tends to show less movement than smaller specimen.
NOTE 2 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.
6.2 Sealing and conditioning of test specimens
Sealing and conditioning of test specimen shall be according to procedure 1 or procedure 2 as follows:
Procedure 1:
The reverse side and the edges of the test specimen shall be sealed, if exposure to water occurs. Condition the test specimens after preparation as follows:
— (23 ± 2) °C and (50 ± 5) % r. II. for at least 28 days;
— Conditioning according to EN 16383 test cycles, either
— heating and wetting (hw), or
— heating and wetting plus heating and cooling (hwc). or
— heating and wetting plus heating and cooling plus wetting, freezing and thawing (hwcft);
— DryingIoratleast7daysat(23 ± 2) °C and (50 ± 5) %r. H.
Procedure 2:
The edges of the test specimens shall be sealed. Condition the test specimens after preparation as follows:
— (23 ± 2) °C and (50 ± 5) % r. H. for at least 28 days;
— Immersion in tap water for at least 7 days at (20 ± 5) °C. The depth of submersion over the entire surface shall be at least 2 mm that is, the distance between levels 6 and 7 in Figure 1.BS EN 13497 pdf free download.
BS EN 13497:2018+A1:2021 pdf download
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