1、BS EN ISO 10321:2008ICS 59.080.70NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDGeosynthetics Tensile test for joints/ seams by wide-widthstrip method (ISO 10321:2008)Incorporating corrigendum October 2009This British Standard was published under the authority
2、of the Standards Policy and Strategy Committee on 30 September 2009. BSI 2009ISBN 978 0 580 69344 1Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 10321:2008National forewordThis British Standard is the UK implementation of EN ISO 10321:2008.It supersedes BS EN ISO 10321:1996 wh
3、ich is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/553, Geotextiles and geomembranes.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionso
4、f a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunityfrom legal obligations.31 October 2009 Correction to BSI titleEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMEN ISO 10321April 2008ICS 59.080.70 Supersedes EN ISO 10321:1996 En
5、glish VersionGeosynthetics - Tensile test for joints/seams by wide-width strip method (ISO 10321:2008)Gosynthtiques - Essai de traction des joints/coutures par la mthode de la bande large (ISO 10321:2008)Geokunststoffe - Zugprfung von Verbindungen/Nhten am breiten Streifen (ISO 10321:2008)This Europ
6、ean Standard was approved by CEN on 12 April 2008.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 without any alteration. Up-to-date lists and bibliographical references conce
7、rning such national standards may be obtained on application to the CEN Management Centre or to any CEN 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
8、 language and notified to the CEN Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuani
9、a, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN
10、All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.Ref. No. EN ISO 10321:2008: EBS EN ISO 10321:2008EN ISO 10321:2008 (E) 3 Foreword This document (EN ISO 10321:2008) has been prepared by Technical Committee ISO/TC 221 “Geosynthetics“ in collaboration
11、 with 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 October 2008, and conflicting national standards shall
12、 be withdrawn at the latest by October 2008. 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 ISO 10321:199
13、6. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Ital
14、y, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 10321:2008 has been approved by CEN as a EN ISO 10321:2008 without any modification. BS EN ISO 10321:2008
15、ISO 10321:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv 1 Scope 1 2 Normative references 2 3 Terms and definitions .3 4 Principle3 5 Apparatus and materials.3 6 Test specimens5 7 Conditioning.6 8 Procedure .8 9 Expression of results 9 10 Test report 10 BS EN ISO 10321:2008ISO 103
16、21:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member
17、body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electr
18、otechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted
19、 by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
20、rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 10321 was prepared by Technical Committee ISO/TC 221, Geosynthetics. This second edition cancels and replaces the first edition (ISO 13021:1992), which has been technically revised. BS EN ISO 10321:2008INTER
21、NATIONAL STANDARD ISO 10321:2008(E) ISO 2008 All rights reserved 1Geosynthetics Tensile test for joints/seams by wide-width strip method 1 Scope This International Standard specifies an index test method for determination of the tensile properties of joints and seams in geosynthetics, using a wide-w
22、idth strip. The method is applicable to most geosynthetics. It is also applicable to geogrids, but the specimen dimensions may need to be altered. This test is not applicable to polymeric or bituminous geosynthetic barriers. This method quantifies the tensile strength of a joint or seam between geos
23、ynthetics. It can provide data to indicate the joint or seam tensile strength which can be achieved. A joint or seam efficiency can be calculated by comparison of the joint/seam tensile strength with the tensile strength of the unjointed material, as determined by ISO 10319. Procedures for measuring
24、 the tensile properties of both conditioned and wet specimens are included. Some modification of techniques may be necessary for particular geosynthetics, e.g. strong geosynthetics, meshes or geosynthetics made from glass fibre, to prevent them from slipping in the jaws or being damaged as a result
25、of being gripped in the jaws. The basic test for joints or seams in all kinds of geosynthetics uses test specimens of 200 mm width, with the provision for the seam or joint to extend for 25 mm on each side, in order to provide joint or seam stability during the test (see Figure 1). BS EN ISO 10321:2
26、008ISO 10321:2008(E) 2 ISO 2008 All rights reservedDimensions in millimetres Key 1 length, in millimetres 2 joint/seam 3 finished specimen A see 6.3.5 and 8.4 b) B specimen width, in millimetres b joint/seam width, in millimetres Figure 1 Preparation of test specimen 2 Normative references The follo
27、wing 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. ISO 554, Standard atmospheres for conditioning and/or test
28、ing Specifications ISO 3696, Water for analytical laboratory use Specification and test methods ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system ISO 9862, Geosynthet
29、ics Sampling and preparation of test specimens ISO 10318:2005, Geosynthetics Terms and definitions ISO 10319, Geosynthetics Wide-width tensile test BS EN ISO 10321:2008ISO 10321:2008(E) ISO 2008 All rights reserved 33 Terms and definitions For the purposes of this document, the terms and definitions
30、 given in ISO 10318 and the following apply. 3.1 seam series of stitches joining two or more separate pieces of a material or materials of planar structure, e.g. geosynthetics or related products 3.2 joint junction at which two or more separate pieces of a geosynthetic are joined by a method other t
31、han stitching 3.3 joint/seam strength Tj/s maxmaximum tensile stress of the seam formed by joining two or more sheets NOTE The joint or seam strength is expressed in kilonewtons per metre. ISO 10318:2005 3.4 joint/seam efficiency j/sratio of the joint or seam strength to the tensile strength of the
32、material measured in the same direction NOTE The joint or seam efficiency is expressed in percent. ISO 10318:2005 4 Principle A geosynthetic specimen, 200 mm wide and containing a joint/seam, is gripped across its entire width in the clamps of a tensile testing machine, operated at a prescribed rate
33、 of extension, and subjected to a longitudinal force (perpendicular to the seam axis) until the joint/seam of the geosynthetic ruptures. 5 Apparatus and materials 5.1 Tensile testing machine Tensile testing machine, constant rate of extension type, complying with ISO 7500-1, Class 2 or higher, in wh
34、ich the rate of increase of the specimen length is uniform with time. 5.2 Jaws Jaws which are sufficiently wide to hold the entire width of the specimen and with appropriate means to limit slippage or damage. Each jaw shall have faces measuring at least the width of the specimen, i.e. 200 mm. NOTE I
35、t is stressed that it is essential to choose jaw faces that limit any slippage of the geosynthetic that may occur, especially for stronger geosynthetics. Examples of types of jaw face, which have been found satisfactory, are given in Figure 2. BS EN ISO 10321:2008ISO 10321:2008(E) 4 ISO 2008 All rig
36、hts reservedDimensions in millimetres a) Wedge jaws b) Compressive block jaws Figure 2 Examples of jaw faces for testing geosynthetics BS EN ISO 10321:2008ISO 10321:2008(E) ISO 2008 All rights reserved 5c) Capstan Key 1 serrated wedge 2 geosynthetic 3 epoxy or soft-metal wedge aSpecimen maximum widt
37、h: 0,5 m. bCompressive force adjustable up to 400 kN. Figure 2 (continued) 5.3 Water For wet specimens only, water complying with Grade 3 of ISO 3696. 5.4 Non-ionic wetting agent For wet specimens only. 6 Test specimens 6.1 Number of test specimens Cut at least five test specimens, each of which inc
38、ludes the seam or joint. 6.2 Selection of test specimens Select specimens in accordance with ISO 9862. 6.3 Dimensions of test specimens 6.3.1 General Prepare test specimens from the jointed or seamed specimen, each of sufficient length to ensure an initial jaw separation of 100 mm plus the joint or
39、seam width, b (see Figure 1) and with the seam or joint located along the centre-line of the specimen, perpendicular to the direction of the applied load. BS EN ISO 10321:2008ISO 10321:2008(E) 6 ISO 2008 All rights reserved6.3.2 Nonwoven geotextiles Cut each specimen, as shown in Figure 1, to achiev
40、e a final specimen width of 200 mm. When removing the shaded area from a specimen, as shown in Figure 1, the angles between the 25 mm extensions, which are parallel to the seam or joint, and that section of the specimen having a finished width of 200 mm shall be 90. 6.3.3 Woven geotextiles For woven
41、 geotextiles (see ISO 10319), make 25 mm long cuts at a distance of (25 mm plus b/2) from the vertical centre-line of the specimen, to facilitate the removal of the edge yarns in attaining the nominal width of 200 mm. 6.3.4 Geogrids For geogrids, prepare jointed specimens at least 200 mm wide and su
42、fficiently long to ensure a clamp separation of at least 100 mm plus the seam/joint width, measured to 3 mm. The jointed test specimen shall contain the same number of tensile elements as the wide-width tensile test specimens and at least one row of nodes or cross-members on either side of the joint
43、, excluding those by which the test specimen is held in the jaws or from which the joint is to be made. Cut all ribs or cross-members at least 10 mm from any node (see Figure 3). The cross-members, from which the joint is to be made, shall be extended by at least one pitch beyond the tensile element
44、s to be tested, on both sides of the specimen, in order to facilitate the formation of the joint. 6.3.5 Knitted geotextiles For knitted geotextiles, geocomposites or others, in which preparing the specimen by cutting with a knife or scissors may affect the geotextile structure, thermal cutting can b
45、e used, taking care to avoid damaging the specimen during the cutting operation, particularly at the points labelled “A” in Figure 1. 6.3.6 Wet testing If wet testing is also required, cut five additional specimens. 6.4 Index characterization For index characterization of the seam/joint, the two ele
46、ments seamed/jointed together shall be oriented in the same direction (warp or weft, machine or cross-machine direction) and aligned perpendicular to the seam/joint and parallel to the applied load axis. 7 Conditioning 7.1 Conditioning and test atmosphere The test specimens shall be conditioned and
47、tested in the standard atmosphere for testing as defined in ISO 554 (20 C 2 C at 65 % RH 5 % RH) (RH is the relative humidity). 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
48、 the mass of the test specimen. Conditioning and/or testing 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. This
49、 information shall be included in the test report. BS EN ISO 10321:2008ISO 10321:2008(E) ISO 2008 All rights reserved 7Key 1 bodkin Figure 3 Example of geogrid seam/joint specimen BS EN ISO 10321:2008ISO 10321:2008(E) 8 ISO 2008 All rights reserved7.2 Conditioning for testing in the wet condition Specimens to be tested in the wet condition shall be immersed in water (5.3) maintained at a temperature of (20 2) C. The time of immersion shall be sufficient to wet the test specimens thoroughly, as
