1、DEUTSCHE NORM June 2000 Anti-glare systems for roads Part 2: Test methods English version of DIN EN 12676-2 I DIN IEN 12676-2 ICs 93.080.30 Blendschutzsysteme fr Straen - Teil 2: Prfverfahren European Standard EN 12676-2 : 2000 has the status of a DIN Standard. A comma is used as the decimal marker.
2、 National foreword This standard has been prepared by CEN/TC 226. The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee), Technical Committee Sonstige Produkte der Straen- ausstattung. The DIN Standards correspond
3、ing to the International Standards referred to in clause 2 of the EN are as follows: IS0 Standard DIN Standard IS0 1043-1 IS0 1043-2 DIN IS0 1043-2 DIN EN IS0 1043-1 IS0 8256 IS0 9227 DIN 50021 DIN EN IS0 8256 National Annex NA Standards referred to (and not included in Normative references and Bibl
4、iography) DIN 50021 DIN EN IS0 1043-1 DIN EN IS0 8256 Corrosion testing - Spray tests with different sodium chloride solutions Plastics -Symbols and abbreviated terms - Part 1 : Basic polymers with their special characteristics (IS0 1043-1 : 1997) Plastics - Determination of the tensile-impact stren
5、gth of plastics (IS0 8256 : 1990, including Technical Corrigendum 1 : 1991) EN comprises 15 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN EN 12676-2 : 2000-0 V Deutsches Institut fr Nonung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, s the
6、 exclusive right of sale for German Standards (DIN-Nonen). English price group O9 Sales No. 1109 10.00 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12676-2 March 2000 ICs 93.080.30 English version Anti-glare systems for roads Part 2: Test methods Systmes anti-blouissement routiers - Partie 2
7、: Mthodes dessai Blendschutzsysteme fr Straen - Teil 2: Prfverfahren This European Standard was approved by CEN on 2000-02-1 8. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard
8、without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other languag
9、e made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece,
10、 Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 2000. CEN -
11、 All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN 12676-2 : 2000 E Page 2 EN 12676-2 : 2000 CONTENTS Page . Foreword 2 1 Scope . 3 2 Normative references . 3 3 Definitions and symbols 3 4 Wind resistance test . 4 5 Ageing tests 6 6 Meas
12、urement of the transmission factor . 8 7 Test report 9 15 Bibliography Foreword This European Standard has been prepared by Technical Committee CEN/TC 226 “Road equipment“ the Secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by pu
13、blication of an identical text or by endorsement, at the latest by September 2000, and conflicting national standards shall be withdrawn at the latest by September 2000. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to imp
14、lement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This European Standard consists of the following Parts under the general
15、title : Anti-glare systems for roads : - Part 1 : Performance and characteristics ; - Part 2 : Test methods. NOTE This draft standard was submitted to the CEN Enquiry as prEN 12677:1997. Page 3 EN 12676-2 : 2000 1 Scope This Part of EN 12676 specifies laboratory test methods which are necessary to a
16、scertain the following characteristics of anti-glare systems: - wind resistance; - behaviour during artificial ageing; - measurement of the transmission factor. 2 Normative references This Part of EN 12676 incorporates by dated or undated reference, provisions from other publications. These normativ
17、e references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this Part of EN 12676 only when incorporated in .it by amendment or revision. For undated referenc
18、es, the latest edition of the publication referred to applies. IS0 4892-2 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon arc sources IS0 8256:1990 Plastics - Determination of tensile impact strength IC0 9227:1990 Corrosion tests in artificial atmospheres - Salt spray test
19、s ISO/CIE 10526:1991 CIE standard colorimetric illuminantc CIE No 15.2:1986 Colorimetry EN 12676-1 Anti-glare systems for roads - Part 1 : Petformances and characteristics 3 Definitions and symbols For the purposes of this Part of EN 12676, the definitions and symbols of EN 12676-1 and the following
20、 apply: 3.1 3.2 3.3 3.4 3.5 3.6 residual strain: the change in position of a point on the anti-glare system following the wind tunnel test, expressed as a percentage of its height above the fixed base of the anti- glare system ci: light transmission factor at specified angle of incidence i 4: incide
21、nt luminous intensity 4: luminous intensity transmitted by the anti-glare system at specified angle of incidence i /i: longitudinal position measurement in the wind tunnel 6: transversal position measurement in the wind tunnel Page 4 EN 12676-2 : 2000 3-7 F height of measuring position from fixed ba
22、se 3.8 d: longitudinal residual strain (see figure 2) 3.9 a(: transverse residual strain (see figure 1) 4 Wind resistance test 4.1 Principle This clause describes the test to be carried out in order to assess the changes and deformations which are caused to anti-glare systems, together with their mo
23、untings, by the action of wind. The wind tunnel test is referred to as the wind resistance test. The test is carried out in a wind tunnel. The test sample is subjected to a steady horizontal air stream of 40 m/s (144 km/h). After the test, the values of the strains 4 and 4 exhibited by the system ar
24、e calculated. The sample is fixed to a base at a height of 800 mm * 50 mm above the turntable in the working section as shown in figures 3 and 4. The base is an open structure allowing the air to pass freely underneath. At the start of the test the major axis of the system is placed perpendicular to
25、 the direction of the air stream. The test is carried out in two phases (see 4.4). 4.2 Apparatus a) Wind tunnel, capable of producing an air stream of 40 m/s (144 km/h) in the centre of the working section, where a turntable is installed with the following characteristics (see figure 4): - diameter:
26、 4,50 m minimum; - minimum range of rotation: +90 and -90“; - with a possibility of viewing the sample during the test, either directly or by means of video recording. b) Device for measuring displacement, accurate to within 5 mm. 4.3 Test sample The anti-glare system used as a sample shall be a min
27、imum of 4 m in length. Such a length may be obtained by combining several units or by using fractions of a unit. One sample shall be tested. Prior to the test, store the sample for at least 24 h in a room where the temperature conditions are similar to those in the working section of the wind tunnel
28、. Page 5 EN 12676-2 : 2000 4.4 Procedure 4.4.1 General Execute the test at a temperature above 10 OC. With the wind tunnel switched off, mount the sample on the turntable such that its major axis is perpendicular to the direction of the air stream. 4.4.2 Initial measurements In the case of systems w
29、hich are composed of separate units, take measurements for each unit. In the case of systems which consist of a continuous screen, take equally spanned measurements (two per metre along the length of the sample). Mark these locations clearly. Take measurements at the highest point of the system. For
30、 each of these measurement points, measure the following parameters: - T; ri and hl as shown (figure 1 and 2); - the temperature in the working section. 4.4.3 Wind test Switch the wind tunnel on. Achieve gradually an air stream speed of 40 m/s by increasing the speed at the rate of 1 m/s (40 s requi
31、red to reach the full speed of 40 m/s). When the air stream reaches a speed of 40 m/s, rotate the turntable in an anti-clockwise direction (as seen from above), at 15“ per minute. Stop the motion at +go“. Switch off the wind tunnel and return the turntable to the initial position. Take the first ser
32、ies of measurements as described in 4.4.4. Restart the wind tunnel and, when the air stream reaches a speed of 40 m/s, rotate the turntable in a clockwise direction at 15“ per minute. Stop the motion at -90“. Switch off the wind tunnel and return the turntable to the initial position. Take the secon
33、d series of measurements as decribed in 4.4.4. NOTE If in the course of the test the sample breaks or is subjected to excessive deformation, the turntable should be stopped and the wind tunnel switched off. The angle at which the turntable has been stopped should be measured. The test should be cons
34、idered unsuccessful. Page 6 EN 12676-2 : 2000 4.4.4 Measurements after testing After letting at least 5 min elapse after the wind tunnel has been switched off, repeat the procedure described in 4.4.2. to measure the horizontal distances fi and /i. 4.5 Expression of results Calculate the strains dt a
35、nd 4, as a percentage of 7; from the measurements made in accordance with 4.4, as follows: All dimensions being in the same units. 5 Ageing tests 5.1 General This clause specifies the equipment and laboratory procedures required to verify the durability of materials used in anti-glare systems, .e.:
36、- for synthetic materials: artificial weathering process preceded and followed by a tensile impact test in accordance with IS0 8256:1990; - for metallic parts: saline mist test in accordance with IS0 9227:1990. 5.2 Synthetic materials 5.2.1 Principle The purpose of the artificial weathering process
37、is to determine the reduction of the mechanical characteristics of the material tested. The reduction is expressed as a percentage of the tensile strength of the material at an ambient temperature of (23 * 3) “C and at (-30 f 3) OC. 5.2.2 Artificial weathering Execute the test in accordance with IS0
38、 4892-2 by taking into account the following: a) test 40 specimens, 20 of which are aged by means of the artificial weathering test. The artificial weathering comprises the following phases: - UV radiation test; - artificial rain (duration: 102 min drying period, 18 min artificial rain period). Page
39、 7 EN 12676-2 : 2000 b) the total duration of the ageing cycle is such that the total radiation is 8 O00 MJ/m2. The test conditions shall be as follows: - xenon lamp in accordance with IS0 4892-2; - black standard temperature between 63 “C and 70 “C (temperature of the test room approximately 40 OC)
40、; - degree of humidity of the air during the drying phase: between 60 Oh and 80 %. 5.2.3 Tensile impact test Test 40 specimens as follows: - 10 specimens at (23 f 3) “C before ageing; - 10 specimens at (23 I 3) “C after ageing; - 10 specimens at (-30 I 3) “C before ageing; - 10 specimens at (-30 f 3
41、) “C after ageing. Execute the test in accordance with IS0 8256:1990, method A (mass 60 g ; energy 25 J), by using type 3 test specimens, which will be cut out in a vertical direction from the anti-glare system, .e. from the same area of an anti-glare system. Prior to carrying out the test, the 10 t
42、est specimens of the same series shall have been stored for at least 24 h at (23 I 3) “C and at (-30 f 3) OC respectively. Calculate the arithmetic mean values of the tensile impact strength, E, of each series: - when new and at (23 I 3) “C (na); - when new and at (-30 f 3) “C ( - after the artifici
43、al weathering and at (-30 * 3) “C (Ei); and the ratios: 5.3 Metallic parts Carry out the corrosion test in accordance with IS0 9227 (NSS test) on two representative samples taken from the complete system of metallic fixing elements. It is essential that each test specimen is representative of at lea
44、st one element of each system of fixing elements used for the anti-glare system. The duration of the test is 720 h. Page 8 EN 12676-2 : 2000 6 Measurement of the transmission factor 6.1 Principle This clause describes a test for measuring the transmission factor ci of anti-glare systems, in order to
45、 evaluate their effectiveness with regard to glare. The transmission factor of the anti-glare system is determined with the system illuminated by a light source with a luminous intensity 4, the transmitted luminous intensity /ti being measured by a photoelectric receptor. 6.2 Apparatus - A light sou
46、rce, CIE-type A standard illuminant in accordance with ISO/CIE 10526:1999. The power supply of this lamp is stabilized and adjusted such that the colour temperature of the lamp is equal to 2 856 K i 20 K. The source consists of a spotlight with an aperture which does not exceed 3“; - A photoelectric
47、 receptor, with spectral response curve identical to the relative luminous efficiency i) in accordance with CIE publication no 15.2. For a diagram of the assembly, see figure 5. 6.3 Test sample The test sample shall consist of one or more basic elements of the anti-glare system to obtain a minimum l
48、ength of 2 m. The test sample shall be clean and dry and shall have remained for 24 h in the room in which the measurements are to be taken. 6.4 Procedure 6.4.1 Measurement of the incident luminous intensity Place the sensitive surface of the photoelectric receptor at a distance D of between 1 O m a
49、nd 20 m from the source and oriented such that the axis of the light beam is normal at its centre. Measure the response Ro of the receptor and calculate the luminous intensity (/o) in candelas using the equation: where K is the calibration constant of the photoelectric receptor. 6.4.2 Measurement of the transmitted luminous intensity Place the anti-glare system in the luminous beam as specified in 6.4.1, equidistant from the light source and the photoelectric receptor, mounted on a base in a vertical position, with its axis at an angle iwith the axis of the beam, as sh
