1、March 2012 Translation by DIN-Sprachendienst.English price group 8No 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 5
2、9.080.70!$z?r“1872879www.din.deDDIN EN 12226Geosynthetics General tests for evaluation following durability testingEnglish translation of DIN EN 12226:2012-03Geokunststoffe Allgemeine Prfverfahren zur Bewertung nach BestndigkeitsprfungenEnglische bersetzung von DIN EN 12226:2012-03Gosynthtiques Essa
3、is gnraux dvaluation aprs essais de durabilitTraduction anglaise de DIN EN 12226:2012-03SupersedesDIN EN 12226:2000-12www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 10 pages02.12 DIN EN 12226:2012-03 2 A comma is used as the decimal ma
4、rker. National foreword This standard has been prepared by Technical Committee CEN/TC 189 “Geosynthetics” (Secretariat: NBN, Belgium). The responsible German body involved in its preparation was the Normenausschuss Textil und Textil-maschinen (Textiles and Textile Machinery Standards Committee), Wor
5、king Committee NA 106-01-11 AA Geotextilien und Geokunststoffe. Amendments This standard differs from DIN EN 12226:2000-12 as follows: a) the standard has been brought in line with the state of the art; b) the title and scope of the standard have been extended from geotextiles and geotextile-related
6、 products to geosynthetics; c) normative references have been updated; d) a new Table 1 “Sampling of specimens for tensile testing of geosythetics after exposure” has been added; e) a new Subclause 5.4 “Compression properties” has been added; f) a new Subclause 6.3 “Change in compressive strength” h
7、as been added; g) Clauses 4 to 6 have been editorially revised; Previous editions DIN V ENV 12226: 1996-12 DIN EN 12226: 2000-12 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12226 January 2012 ICS 59.080.70 Supersedes EN 12226:2000English Version Geosynthetics - General tests for evaluation
8、following durability testing Gosynthtiques - Essais gnraux dvaluation aprs essais de durabilit Geokunststoffe - Allgemeine Prfverfahren zur Bewertung nach Bestndigkeitsprfungen This European Standard was approved by CEN on 26 November 2011. CEN members are bound to comply with the CEN/CENELEC Intern
9、al Regulations which stipulate the conditions for giving this European Standard the status of a national standard without 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 C
10、EN member. This European Standard exists in three official versions (English, French, German). A version in any other language 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 vers
11、ions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sl
12、ovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12226:2012: EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROP
13、EN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEN 12226:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Principle 44 Specimens 44.1 Number of specimens .44.2 Sampling .54.3 Conditioning and exposure 65 Procedures .75.1 Visual examination 75.2 Microscopic examination 75.3 Tens
14、ile properties 75.4 Compression properties .76 Expression of results 76.1 Change in maximum tensile load .76.2 Change in elongation at break (for GBR-B and GBR-P only) 76.3 Change in compressive strength .87 Test report 8DIN EN 12226:2012-03 EN 12226:2012 (E) 3 Foreword This document (EN 12226:2012)
15、 has been prepared by Technical Committee CEN/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 July 2012, and conflicting national s
16、tandards shall be withdrawn at the latest by July 2012. 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 12
17、226:2000. The main changes compared to the previous edition are: a) the title and scope of the standard was extended from geotextiles and geotextile-related products to geosynthetics; b) normative references revised; c) new Table 1 “Sampling of specimens for tensile testing of geosynthetics after ex
18、posure“ added; d) new subclause 5.4 “Compression properties“ added; e) new subclause 6.3 “Change in compressive strength“ added. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria,
19、Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, 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 Kingdo
20、m. DIN EN 12226:2012-03 EN 12226:2012 (E) 4 1 Scope This European Standard specifies test methods for determining the change in specific properties of aged geosynthetics. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer
21、ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12311-1, Flexible sheets for waterproofing Part 1: Bitumen sheets for roof waterproofing Determination of tensile properties EN 29073-3, Textiles Test m
22、ethods for nonwovens Part 3: Determination of tensile strength and elongation EN ISO 527-3, Plastics Determination of tensile properties Part 3: Test conditions for films and sheets (ISO 527-3) EN ISO 527-4, Plastics Determination of tensile properties Part 4: Test conditions for isotropic and ortho
23、tropic fibre-reinforced plastic composites (ISO 527-4) EN ISO 9862, Geosynthetics Sampling and preparation of test specimens (ISO 9862) EN ISO 10318, Geosynthetics Terms and definitions (ISO 10318) EN ISO 10319, Geosynthetics Wide-width tensile test (ISO 10319) EN ISO 13934-1, Textiles Tensile prope
24、rties of fabrics Part 1: Determination of maximum force and elongation at maximum force using the strip method (ISO 13934-1) EN ISO 25619-2, Geosynthetics Determination of compression behaviour Part 2: Determination of short-term compression behaviour (ISO 25619-2) ISO/TS 13434, Geosynthetics Guidel
25、ines for the assessment of durability 3 Principle The test specimens are exposed to a durability test for geosynthetics. The exposure is followed by visual and, if required, microscopic inspection and by determination of changes in tensile or compressive properties, as appropriate. NOTE For further
26、information on relevant durability tests see ISO/TS 13434. 4 Specimens 4.1 Number of specimens For each durability test the number of test and control specimens shall be a minimum of five, in both the machine and the cross-direction, unless the nature of the geosynthetic makes this inappropriate. DI
27、N EN 12226:2012-03 EN 12226:2012 (E) 5 4.2 Sampling Prepare specimens in accordance with EN ISO 9862. An overview of test methods, specimen sizes and test conditions per product type is given in Table 1. For woven and knitted geotextiles (GTX-W and GTX-K), cut pairs of test and control specimens at
28、least 60 mm wide and 300 mm long containing the same yarns or strips in the direction of test, i.e. adjacent along the shorter dimension. Count the number of these yarns or strips within 50 mm in the machine direction and in the cross machine direction. Record the numbers as n1and n2respectively. Fo
29、r woven geotextiles remove threads in approximately equal numbers from each of the long edges of the cut strip until the width of the exposed and control specimens contains a number of threads identical to the corresponding numbers n1and n2. For machine and cross machine direction record separately
30、the tensile strengths of the control specimens as Fciand of the exposed as Fei. If required, record the strains at maximum load as ciand eirespectively, “i“ indicating the number of specimen. For nonwoven geotextiles (GTX-N), cut pairs of test and control specimens at least 50 mm wide and 300 mm lon
31、g adjacent along the larger dimension. For geogrids (GGR), cut specimens containing one or more complete ribs in width with a minimum of one junction and preferably three junctions in length. There shall be one junction at the centre of the specimen. GGR shall be tested according to EN ISO 10319, mo
32、dified as necessary for one rib or more in width. For geostrips (GST), cut specimens in full width and at least 300 mm long. For geonets (GNT), geomats (GMA) and geospacers (GSP) cut pairs of test and control specimens at least 50 mm wide and at least 300 mm long adjacent along the larger dimension.
33、 For geocomposites (GCO) consisting of more than one geosynthetic product, the components shall be individually tested for durability. If this is not feasible, a technical justification for an alternative testing approach shall be presented and reported. For certain products, e.g. geospacers (GSP),
34、tensile tests are not always applicable. For those products compression tests according to EN ISO 25619-2 shall be performed. A compression test specimen shall contain at least three load bearing elements in machine direction and in cross-machine direction. If this is not feasible, a technical justi
35、fication for an alternative testing approach shall be presented and reported. For geosynthetic barriers (GBR), components will only be separately tested if so specified in the relevant application standards. Polymeric and bituminous geosynthetic barriers (GBR-P and GBR-B) shall be sampled as test pl
36、ates in accordance with the relevant exposure test methods. Clay geosynthetic barriers (GBR-C) shall be sampled as geocomposite products. NOTE 1 GCD (drainage geocomposite) can consist of GTX and GNT or GMA or GSP. NOTE 2 GCR (reinforcement geocomposite) can consist of GTX, GGR or a structure simila
37、r to GGR. NOTE 3 Geocells (GCE) or other erosion control products are not included, because the harmonized standards for the application as surface erosion control are not available so far. NOTE 4 The variability in the tensile strength of nonwovens may be reduced if tensile strength is assumed to c
38、orrelate with the mass of the specimens. The outer 10 % of the roll width together with any areas with visible faults should be discarded. The specimens should then be cut or punched out with equal dimensions, weighed, and the mean mass (m) and the standard deviation (s) of the mass calculated. All
39、specimens, whose mass miis greater or less than one standard deviation from the mean should be discarded, amounting to about one third of the specimens. From these specimens of mass mi, sets of n specimens can be compiled for each exposure time such that the total mass of each set (mi) fulfils the r
40、elation: DIN EN 12226:2012-03 EN 12226:2012 (E) 6 smnmsmn + iTable 1 Sampling of specimens for tensile testing of geosynthetics after exposure Product type aTest Method Specimen Size (specimen length x specimen width) Test Conditions (distance between the clamps L; width B of test specimen or test s
41、pecimen type; test speed or strain rate; elongation measurement technique GTX-N EN 29073-3 300 mm x 50 mm L = 200 mm, B = 50 mm, 100 mm/min, grip separation measurement GTX-W, GTX-K EN ISO 13934-1 300 mm x 60 mm L = 200 mm, B = 50 mm, 100 mm/min, grip separation measurement GGR following EN ISO 1031
42、9 width: 1 rib, length: 300 mm to 500 mm L 200 mm, 20 % L/min, grip separation measurement GST following EN ISO 10319 full width, length: 300 mm L = 200 mm, 20 % L/min, grip separation measurement GNT following EN ISO 13934-1 300 mm x 50 mm L = 200 mm, B = 50 mm, 100 mm/min, grip separation measurem
43、ent GMA following EN ISO 13934-1 300 mm x 50 mm L = 200 mm, B =50 mm, 100 mm/min, grip separation measurement GSP following EN ISO 13934-1 300 mm x 50 mm, depending on the studs L = 200 mm, B = 50 mm, 100 mm/min, grip separation measurement GCO following EN ISO 13934-1; each component to be tested s
44、eparately as GTX or GTP 300 mm x 50 mm L = 200 mm, B = 50 mm, 100 mm/min, grip separation measurement aGBR-C following EN ISO 13934-1; each component to be tested separately (see GCO) 300 mm x 50 mm L = 200 mm, B = 50 mm, 100 mm/min, grip separation measurement GBR-B EN 12311-1 300 mm x 50 mm L = 20
45、0 mm, B = 50 mm, 100 mm/min, gauge length L0= 180 mm aGBR-P, homogeneous EN ISO 527-3 test plate (130 mm x 180 mm) Type 5, L = 80 mm, 100 mm/min, gauge length L0= 25 mm aGBR-P, reinforced EN ISO 527-4 300 mm x 50 mm Type 2, L = 150 mm, 5 mm/min, gauge length L0= 50 mm aato be measured with extensome
46、ter 4.3 Conditioning and exposure Store the control specimens in the dark. Expose the other specimens as described in the relevant durability standard, following the guidelines of ISO/TS 13434. Before testing, both the control and exposed specimens shall be conditioned in the standard atmosphere as
47、defined in the relevant test standards. 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 specimen. DIN EN 12226:2012-03 EN 12226:2012 (E) 7 Conditioning and testi
48、ng in standard atmosphere may only be omitted when it can be 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. Test both control specimens and exposed specimens together one after the other after finalizing of exposure. 5 Procedures 5.1 Visual examination Inspect the exposed specimens with the naked eye and report changes relati
