1、June 2015Translation by DIN-Sprachendienst.English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 59.
2、080.70!%Cj“2322771www.din.deDDIN EN 14574Geosynthetics Determination of the pyramid puncture resistance of supportedgeosynthetics;English version EN 14574:2015,English translation of DIN EN 14574:2015-06Geokunststoffe Bestimmung des Pyramidendurchdrckwiderstandes von Geokunststoffen auf harterUnterl
3、age;Englische Fassung EN 14574:2015,Englische bersetzung von DIN EN 14574:2015-06Gosynthtiques Dtermination de la rsistance au poinonnement pyramidal des gosynthtiques sursupport;Version anglaise EN 14574:2015,Traduction anglaise de DIN EN 14574:2015-06SupersedesDIN EN 14574:2005-03www.beuth.deIn ca
4、se of doubt, the German-language original shall be considered authoritative.Document comprises 9 pages05.15 DIN EN 14574:2015-062 A comma is used as the decimal marker. National foreword This document (EN 14574:2015) has been prepared by Technical Committee CEN/TC 189 “Geosynthetics” (Secretariat: N
5、BN, Belgium). The responsible German body involved in its preparation was the DIN-Normenausschuss Textil und Textil-maschinen (DIN Standards Committee Textiles and Textile Machinery), Working Committee NA 106-01-11 AA Geotextilien und Geokunststoffe. Amendments This standard differs from DIN EN 1457
6、4:2005-03 as follows: a) Clause 2 “Normative references” has been updated; b) Clause 7 “Conditioning” has been supplemented; c) Figures 1 and 2 have been revised; d) the former Annex A (informative) “Test method on a soft support” has been deleted. Previous editions DIN EN 14574: 2005-03 EN 14574Apr
7、il 2015 ICS 59.080.70 Supersedes EN 14574:2004English Version Geosynthetics - Determination of the pyramid puncture resistance of supported geosynthetics Gosynthtiques - Dtermination de la rsistance au poinonnement pyramidal des gosynthtiques sur supportGeokunststoffe - Bestimmung des Pyramidendurch
8、drckwiderstandes von Geokunststoffen auf harter Unterlage This European Standard was approved by CEN on 14 February 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard witho
9、ut any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other l
10、anguage made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Den
11、mark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. CEN-CENELEC Manage
12、ment Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14574:2015 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORM
13、E EUROPENNEEUROPISCHE NORMEN 14574:2015 (E) 2 Contents Page Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 4 4 Principle . 4 5 Apparatus 4 5.1 Test configuration . 4 5.2 Underlying aluminium medium . 5 5.3 Loading piston 5 5.4 Electrical equipment for the determination
14、 of the push-through load 6 6 Specimens . 6 6.1 Sampling 6 6.2 Number and dimension of specimens 6 7 Conditioning 6 8 Procedure 7 9 Calculation and expression of test results 7 10 Test report . 7 DIN EN 14574:2015-063 Foreword This document (EN 14574:2015) has been prepared by Technical Committee CE
15、N/TC 189 “Geosynthetics”, the secretariat of which is held by NBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2015, and conflicting national standards shall be withdrawn at the latest
16、 by October 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14574:2004. Significant technical change
17、s in comparison to the previous edition include: Annex A (informative) has been deleted. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czec
18、h Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom
19、. EN 14574:2015 (E) DIN EN 14574:2015-064 1 Scope This European Standard specifies an index test method to determine the puncture resistance of a geosynthetic on a rigid support. This method simulates the efficiency of a geosynthetic protecting a geosynthetic barrier material or another contact surf
20、ace against sharp rigid elements under short term loading. 2 Normative references 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 lat
21、est edition of the referenced document (including any amendments) applies. EN 485-2, Aluminium and aluminium alloys - Sheet, strip and plate - Part 2: Mechanical properties EN ISO 7500-1, Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/compression testing mach
22、ines - Verification and calibration of the force-measuring system (ISO 7500-1) EN ISO 9862, Geosynthetics - Sampling and preparation of test specimens (ISO 9862) EN ISO 10320, Geotextiles and geotextile-related products - Identification on site (ISO 10320) ISO 554, Standard atmospheres for condition
23、ing and/or testing Specifications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 puncture load load of the piston as it is pushed onto the test specimen at a constant rate of advance 3.2 push-through load maximum load at perforation of the g
24、eosynthetic 4 Principle A test specimen lies flat on an aluminium plate supported by a steel base, secured in a tensile/compression testing machine. A force is exerted on the centre of the test specimen by an inverted steel pyramid, attached to a load indicator, until perforation of the specimen occ
25、urs. The recorded push-through load is considered to be representative for the protection efficiency of the specimen. 5 Apparatus 5.1 Test configuration A suitable testing machine with a force reading accuracy according to EN ISO 7500-1 shall be used. The press shall be able to maintain a constant t
26、est speed of the loading piston. A special piston and electric signal equipment for determining the moment of push-through are the additional pieces of test equipment needed (see Figure 1). EN 14574:2015 (E) DIN EN 14574:2015-065 Key 1 base 2 aluminium plate 3 test specimen 4 loading piston 5 electr
27、ical circuit ( 20 V DC) Figure 1 Test configuration with rigid underlying aluminium plate 5.2 Underlying aluminium medium A 3 mm thick aluminium plate (AlMgSi1F32 according to EN 485-2) shall be used as the underlying medium for this test method. The aluminium plate simulates a hard, rigid support.
28、It shall be placed on a steel base. 5.3 Loading piston The upper part of the loading piston (see Figure 2) can be a cylinder with a diameter of (25,0 0,1) mm or a square shape with a polished and hardened solid steel pyramid-shaped apex. The apex shall be a four sided pyramid with an apex angle of 9
29、0 rounded off with a radius (R) of (0,50 0,02) mm. The edges of the pyramid shall be rounded off with a radius of (0,50 0,02) mm. The transitional edge from the base of the pyramid to the cylinder or square shall have a radius (R) of (0,5 0,1) mm. EN 14574:2015 (E) DIN EN 14574:2015-066 Dimensions i
30、n millimetres Figure 2 Loading piston (e.g. with cylindrical upper part) 5.4 Electrical equipment for the determination of the push-through load An electrical circuit shall be placed between the loading piston and the underlying medium in order to determine the puncture load at failure. 6 Specimens
31、6.1 Sampling Take specimens in accordance with EN ISO 9862. 6.2 Number and dimension of specimens Cut ten test specimens of 100 mm x 100 mm from the sample. 7 Conditioning The test specimens shall be conditioned and tested in the standard atmosphere for testing (20 2) C at (65 5) % RH) as defined in
32、 ISO 554. The specimens can be considered to have been conditioned when the change in mass in successive weightings made at intervals of not less than 2 h does not exceed 0,25 % of the mass of the test specimen. Conditioning and/or testing in a standard atmosphere may only be omitted when it can be
33、shown that results obtained for the same specific type of product (both structure and polymer type) are not affected by changes in temperature and humidity exceeding the limits. This information shall be included in the test report. EN 14574:2015 (E) DIN EN 14574:2015-06EN 14574:2015 (E) 7 8 Procedu
34、re Select the load range of the tensile/compression testing machine such that the perforation occurs between 10 % and 90 % of the full-scale load. Lay the test specimen flat on the smooth aluminium plate. Test at a machine speed of (1,0 0,1) mm/min until the puncture load is registered by the electr
35、ical circuit between the loading piston and the aluminium plate. Where the electrical circuit does not stop the test automatically, great care should be taken to ensure that the push-through load recorded represents the correct value. 9 Calculation and expression of test results The push-through loa
36、d (in N) is expressed as the arithmetic average of ten individual tests. 10 Test report The test report shall include the following particulars: a) reference number and date of publication of this European Standard; b) identification of the sample tested according to EN ISO 10320, date of receipt; c) conditioning atmosphere for the test, and whether tested dry or wet; d) individual test results and average push-through load (in N); e) coefficient of variation of push-through load (in %); f) any deviation from this procedure. DIN EN 14574:2015-06
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