ДСТУ Б EN 1297:2013
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page 1 2 З? 4 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 6 в?и?п? 6.1 6.2 6.3 7 7.1 7.2 7.3 7.4 7.5 7.6 8 9 10 1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Principle 3
5 Apparatus 3
5.1 Laboratory light source 3
5.2 Test Chamber 3
5.3 Specimen arrangement 3
5.4 Water supply and spray mechanism 4
5.5 Cycle timer 4
5.6 Thermometer 5
5.7 Radiometer 5
6 Sampling and preparation of test
spe cimens 5
6.1 Sampling 5
6.2 Dimensions of test specimens ... 5
6.3 Preconditioning of specimens ... 5
7 Procedure 5
7.1 General 5
7.2 Exposure cycle 5
7.3 Black standard temperature .... 6
7.4 Chamber heating 6
7.5 Relative humidity 6
7.6 Procedure 6
8 Expression of result 6
9 Precision 6
10 Test report 7
Annex A (informative)
Spectral irradiance of fluorescent UV lams type I (340 nm) 8
Annex В? (informative) Recommendations 9
Bibliography 11
EN 1297:2004 - - - - - У? - -
BITUMEN, PLASTIC AND RUBBER SHEETS FOR ROOF WATERPROOFING -METHOD OF ARTIFICIAL AGEING BY LONG TERM EXPOSURE TO THE COMBINATION OFUV RADIATION, ELEVATED TEMPERATURE AND WATER
1 2 EN 13416, EN ISO 4892-1, EN ISO 4892-3, 1 Scope
This document specifies the method for exposure of factory made bitumen or plastic or rubber sheets for roof waterproofing to combined effects of long term exposure by UV radiation, elevated temperature and water as means of artificial ageing.
2 Normative references
The following referenced documents are indispensable for the application 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 13416, Flexible sheets for waterproofing - Bitumen, plastic and rubber sheets for roof waterproofing - Rules for sampling
EN ISO 4892-1, Plastics - Methods of exposure to laboratory light sources - Part 1: General guidance (ISO 4892-1:1999)
EN ISO 4892-3, Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV lamps (ISO 4892-3:1994)
For the purposes of this document, the following terms and definitions apply. lamp in which primary radiation from a low pressure mercury arc is transformed into higher wavelength UV by means of a fluorescent phosphor. The spectral emission of a fluorescent lamp is determined by the spectral emission of the fluorescent phosphor and the transmission characteristics of the glass tube.
A fluorescent UV lamp is a lamp in which the radiant emission in the ultraviolet region of the spectrum < 400 nm makes up at least 80 % of the total radiation outpu 3.2 irradiance
incident radiant flux onto a surface per unit area E W/m 2 3.3 spectral irradiance
radiant flux per unit area per wavelength interval Ex W/m 2 nm 3.4 Radiant exposure
time integral of irradiance H J/m 2 3.5 UV-radiation
radiation with a wavelength X
between: 100 nm < X < 400 nm X nm 3.6 Exposed side
side of the test specimen designated by the manufacturer to be exposed to the sunlight
4 5 5.1 5.2 5.3 - - 4 Principle
Test specimens cut from the product sample are exposed in an apparatus with fluorescent UV lamps at specified irradiance, black standard temperature (BST), relative humidity and cyclic water spraying.
The resistance to this exposure is determined by follow-up tests described in the product standards on flexible bitumen or plastic or rubber sheets for roof waterproofing.
5 Apparatus
5.1 Laboratory light source
The UV source shall be an an-ay of fluorescent UV lamps of type I (340 nm) or a fluorescent UV lamp combination in accordance with EN ISO 4892-3 with a mean UV inadiance in the plane of the specimen urfaces of (45 The. irradiance at the test specimen surface shall not vary more than In order to achieve homogeneous exposure conditions operate the apparatus according to the manufacturer's instructions (e.g. replacement of lamps and repositioning of specimens) and use dummy specimens at void positions.
5.2 Test Chamber
The design of the test chamber may vary but it shall be constructed from inert material and provide for uniform irradiance in accordance to 5.1 with means for controlling the black standard temperature (BST) and relative humidity in the dry period.
5.3 Specimen arrangement
The test specimen racks shall allow the specimens to
- lie flat in the plane > 5 - be mounted so that the exposed face is in the plane of uniform irradiance.
5.4 5.5 The specimens shall be attached to stainless steel platens of at least the same size as the specimens by appropriate means.
The attachment shall leave an area open to free irradiation so that subsequent tests can be performed on irradiated parts of the specimen.
For inclinations near to horizontal the specimens may be alternatively placed in stainless steel pans of at least the same size as the specimens. The specimens shall be weighted in this arrangement by means of a LI shaped stainless frame. The external dimensions of the frame shall correspond to the specimen size. The cross section of the steel frame shall be (5 If the specimens are placed in pans, the lower end of the pans shall have sufficient slits or holes to avoid any collection of water. The attachment arrangement shall not restrain the test specimens from changes in dimensions during exposure.
5.4 Water supply and spray mechanism
Demineralized water with a maximum conductivity of 500 pS/m shall be used for spraying. In general the temperature of the water to be used in the spraying procedure shall be (25 The flow rate through the nozzles shall be (10 5.5 Cycle timer
A continuously operating cycle timer or controller shall allow programming of the spray cycles. An hour meter shall be provided to record total time of operation and UV exposure.
5.6 5.7 6 6.1 6.2 6.3 7 7.1 7.2 5.6 Thermometer
Thermometer capable of measuring the black standard temperature in accordance with EN ISO 4892-1, with means to record the temperature during each cycle.
5.7 Radiometer
A radiometer to determine the UV radiant exposure in J/m 2 in the wavelength region from 300 nm to 400 nm.
6 Sampling and preparation of test specimens
6.1 Sampling
For the purpose of this document, a complete undamaged roll of the sheet to be tested shall be selected in accordance with EN 13416.
6.2 Dimensions of test specimens
Test specimens of sufficient size according to the follow-up test to be performed shall be cut from the test piece in accordance with EN 13416. The machine direction should be indicated.
Durable marks for dimensional measurements before and after exposure shall be applied to the test specimens.
6.3 Preconditioning of specimens
Appropriate preconditioning of the specimens shall be carried out according to the tests to be performed as specified in the product standard on bitumen or plastic or rubber sheets.
7 Procedure
7.1 General
The test specimens and the black standard thermometer shall be mounted in the specimen holders with their exposed sides facing the lamps (5.1)
7.2 Exposure cycle
An exposure cycle has a duration of 360 min and consists of a 300 min dry period followed by a 60 min spray (wet) period in accordance with EN ISO 4892-3. Irradiation is not maintained during the wet period.
7.3 7.4 7.5 7.6 8 9 7.3 Black standard temperature
The black standard temperature (BST) shall be at (60 7.4 Chamber heating
During the spray period the chamber heating is turned off.
7.5 Relative humidity
The relative humidity during the dry period shall be (10 7.6 Procedure
Operate continuously, repeating the programmed cycle, except for servicing the instrument and inspection of test specimens.
NOTE 1 The total amount of UV radiant exposure is specified in the relevant standards EN 13707and prEN 13956 (definitions and characteristics). Relevant recommendations are given in Annex B.
NOTE 2 Eventual Intermediate tests or observations are specified in the standards EN 13707 and prEN 13956 (definitions and characteristics). Relevant recommendations are given In Annex B.
8 Expression of results
Observe, compare and record the performance of test specimens unexposed and exposed regarding their visual change, mass change and crack formation.
Any subsequent destructive tests shall be conducted according to the relevant product standards for Bitumen, plastic and rubber sheets for roof waterproofing.
9 Precision
The precision is not specified by this standard.
No report on international laboratory tests of repeatability or reproducibility is available. An accuracy statement will be added to the next revision when sufficient laboratory data, now in preparation, will be available.
10 а?) Ь?) с?) d) е?) f) 10 Test report
The test report shall include at least the following information:
a) all details necessary to identify the product tested;
b) a reference to this document (EN 1297:2004) and any deviation from it;
c) information about the apparatus in accordance with Clause 5;
d) information on sampling and details on preparation of test specimens in accordance with Clause 6;
e) information on the test procedure I ac in accordance with Clause 7 (7.1 to 7.5);
f) the test results in accordance with Cl Clause 8;
g) date of the test.
Figure A.1 - Spectral irradiance of fluorescent UV lamps type I (340 nm)
В?.1 В?.2 В?.З? а?) - - - б?) Annex Recommendations
В?.1 Spray cycle
The deionised water used in the spray cycles may be recycled. It should be replaced by fresh deionized water when the conductivity exceeds 500 pS/m. A usage period of about one week is recommended.
The size of reservoir of the deionised water should be chosen large enough to .ensure a water temperature at the beginning of the spray cycle of (25 B.2 Exposure duration
It is recommended that the total UV exposure duration should be 5 000 h, corresponding to about 800 MJ/m 2 of UV radiant exposure.
B.3 Intermediate tests
The effect of the exposure may be observed visually by assessment of crack formation