BS EN ISO 10319-2015 Geosynthetics Wide-width tensile test《土工合成材料 宽幅拉伸试验》.pdf

1、BSI Standards PublicationBS EN ISO 10319:2015Geosynthetics Wide-widthtensile testBS EN ISO 10319:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO10319:2015. It supersedes BS EN ISO 10319:2008 which is withdrawn.The UK participation in its preparation was

2、 entrusted to TechnicalCommittee B/553, Geotextiles and geomembranes.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplicati

3、on. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 81462 4ICS 59.080.70Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee o

4、n 31 May 2015.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10319 May 2015 ICS 59.080.70 Supersedes EN ISO 10319:2008English Version Geosynthetics - Wide-width tensile test (ISO 10319:2015) Gosynthtiques - Essai de traction des bandes l

5、arges (ISO10319:2015) Geokunststoffe - Zugversuch am breiten Streifen (ISO 10319:2015) This European Standard was approved by CEN on 16 April 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

6、 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 CEN member. This European Standard exists in three official versions (English, French, German)

7、. 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 versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, C

8、yprus, Czech 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 United

9、Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management 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 ISO

10、 10319:2015 EBS EN ISO 10319:2015EN ISO 10319:2015 (E) 3 Foreword This document (EN ISO 10319:2015) has been prepared by Technical Committee ISO/TC 221 “Geosynthetics“ in collaboration with Technical Committee CEN/TC 189 “Geosynthetics” the secretariat of which is held by NBN. This European Standard

11、 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2015, and conflicting national standards shall be withdrawn at the latest by November 2015. Attention is drawn to the possibility that some of the elements of th

12、is 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 10319:2008. This document has been prepared under a mandate given to CENELEC by the European Commission and the European Fr

13、ee Trade Association. 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, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of

14、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. Endorsement notice The text of ISO 10319:2015 has been approved b

15、y CEN as EN ISO 10319:2015 without any modification. BS EN ISO 10319:2015ISO 10319:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 45 Apparatus and reagents 56 Test specimens 56.1 Number of test specimens . 56.2 Preparation of test specimens . 66.3 Dimensi

16、ons . 66.3.1 Nonwoven geotextiles, knitted geotextiles, geonets, geomats, clay geosynthetic barriers, drainage composites, and other products . 66.3.2 Woven geotextiles . 66.3.3 Geogrids with one axis 66.3.4 Geogrids with two axes and four axes . 66.3.5 Geogrids with three axes 76.3.6 Metallic geote

17、xtile related product 76.3.7 Testing wet specimen .107 Conditioning atmosphere 117.1 General 117.2 Conditioning for testing in wet condition . 118 Test procedure .118.1 Setting up the tensile testing machine. 118.2 Insertion of the test specimen in the jaws 118.3 Installation of the extensometer . 1

18、28.4 Measurement of tensile properties 128.5 Measurement of strain 129 Calculations.139.1 Tensile strength . 139.2 Tensile strain at tensile strength 139.3 Tensile strain at nominal tensile strength 139.4 Secant stiffness 1410 Test report 14 ISO 2015 All rights reserved iiiContents PageBS EN ISO 103

19、19:2015ISO 10319:2015(E)ForewordISO (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 body interested in

20、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 Electrotechnical Commissi

21、on (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents shoul

22、d be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for iden

23、tifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the conveni

24、ence of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword S

25、upplementary information .The committee responsible for this document is ISO/TC 221, Geosynthetics.This third edition cancels and replaces the second edition (ISO 10319:2008), which has been technically revised.iv ISO 2015 All rights reservedBS EN ISO 10319:2015Geosynthetics Wide-width tensile test1

26、 ScopeThis International Standard describes an index test method for the determination of the tensile properties of geosynthetics (polymeric, glass, and metallic), using a wide-width strip. This International Standard is applicable to most geosynthetics, including woven geotextiles, nonwoven geotext

27、iles, geocomposites, knitted geotextiles, geonets, geomats, and metallic products. It is also applicable to geogrids and similar open-structure geotextiles, but specimen dimensions might need to be altered. It is not applicable to polymeric or bituminous geosynthetic barriers, while it is applicable

28、 to clay geosynthetic barriers.This International Standard specifies a tensile test method that covers the measurement of load elongation characteristics and includes procedures for the calculation of secant stiffness, maximum load per unit width and strain at maximum load. Singular points on the lo

29、ad-extension curve are also indicated.Procedures for measuring the tensile properties of both conditioned and wet specimens are included in this International Standard.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensabl

30、e for its application. 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 testing SpecificationsISO 3696, Water for analytical laboratory

31、use Specification and test methodsISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/ compression testing machines Verification and calibration of the force-measuring systemISO 9862, Geosynthetics Sampling and preparation of test specimensISO 10318, Geosy

32、nthetics Terms and definitionsISO 10321, Geosynthetics Tensile test for joints/seams by wide-width strip methodEN 10223-3, Steel wire and wire products for fencing and netting Part 3: Hexagonal steel wire mesh products for engineering purposes3 Terms and definitionsFor the purposes of this document,

33、 the terms and definitions given in ISO 10318 and the following apply.3.1nominal gauge lengthinitial distance, normally 60 mm (30 mm on either side of the specimen symmetrical centre), between two reference points located on the specimen parallel to the applied load direction3.2elongation at preload

34、measured increase in gauge length (mm) corresponding to an applied load of 1 % of the maximum loadNote 1 to entry: The elongation at preload is indicated as SA in Figure 1.INTERNATIONAL STANDARD ISO 10319:2015(E) ISO 2015 All rights reserved 1BS EN ISO 10319:2015ISO 10319:2015(E)3.3true gauge length

35、L0nominal gauge length (3.1) in millimetres plus the elongation at preload (3.2) in millimetres3.4maximum tensile ForceFmaxmaximum tensile force obtained during a testNote 1 to entry: The maximum load is expressed in kilonewtons (kN).3.5tensile strainincrease in true gauge length (3.3) of a specimen

36、 during a test divided by true gauge lengthNote 1 to entry: Tensile strain is expressed as a percentage of the true gauge length.3.6tensile strain at maximum tensile loadmaxtensile strain (3.5) exhibited by the specimen under maximum tensile loadNote 1 to entry: Tensile strain at maximum tensile loa

37、d is expressed in percent.3.7tensile strain at nominal strengthnomstrain at the guaranteed strength as defined by the manufacturer3.8tensile secant stiffnessJratio of tensile force per unit width to an associated value of strainNote 1 to entry: Tensile secant stiffness is expressed in kilonewtons pe

38、r metre (kN/m).3.9tensile strengthTmaxmaximum force per unit width observed during a test in which the specimen is stretched to ruptureNote 1 to entry: Tensile strength is expressed in kilonewtons per metre (kN/m).3.10strain ratestrain at maximum load, divided by the duration of the test, i.e. the t

39、ime to attainment of maximum tensile load from preloadNote 1 to entry: Strain rate is expressed in percentage per minute.2 ISO 2015 All rights reservedBS EN ISO 10319:2015ISO 10319:2015(E)KeyT load/unit width, in kN/m strain, in %AC strain for secant stiffnessAZ secantSA elongation at preloadFigure

40、1 Typical load per unit width/strain curve ISO 2015 All rights reserved 3BS EN ISO 10319:2015ISO 10319:2015(E)KeyTmaxtensile strength (kN/m)maxtensile strain (%)Tmaxtensile strength (kN/m) at second peakmaxtensile strain (%) at second peakFigure 2 Typical tensile load per unit width strain curves of

41、 two geocomposites second peak-values marked by “”, e.g. Tmax, max4 PrincipleA specimen is held across its entire width in a set of clamps or jaws (see Figure 3) of a tensile testing machine operated at a constant displacement speed, and a longitudinal force is applied to the test specimen until the

42、 specimen ruptures. The tensile properties of the test specimen are calculated from machine scales, dials, autographic recording charts, or an interfaced computer. A constant test speed is selected so as to give a strain rate of (20 5) % per minute in the gauge length of the specimen, except for pro

43、ducts that exhibit a low strain, i.e. less than or equal to 5 %. For these products, e.g. glass, the speed is reduced so that the specimen breaks in 30 5 s.The basic distinction between the current method and other methods for measuring tensile properties of fabrics is the width of the specimen. In

44、the current method, the width is greater than the length of the specimen, as some geosynthetics have a tendency to contract (neck down) under load in the gauge length area.The greater width reduces the contraction effect of such fabrics and provides a relationship closer to the expected fabric behav

45、iour in the field, as well as a standard for comparison of geosynthetics.When information on strain is required, extension measurements are made by means of an extensometer, which follows the movement of two reference points on the specimen. These reference points are situated on the specimen symmet

46、ry axis, which is parallel to the applied load, and are separated by a distance of 60 mm (30 mm on each side of the specimen symmetry centre). This distance can be adapted for some types of geogrid in order to include at least one row of nodes or internal junctions.4 ISO 2015 All rights reservedBS E

47、N ISO 10319:2015ISO 10319:2015(E)5 Apparatus and reagents5.1 Tensile testing machine (constant rate of extension), complying with ISO 7500-1, Class 2 or better, in which the rate of increase of specimen length is uniform with time, fitted with a set of clamps or jaws which are sufficiently wide to h

48、old the entire width of the specimen and equipped with appropriate means to limit slippage or damage. One clamp may be supported by a free swivel or universal joint to compensate for uneven distribution of force across the specimen.Compressive jaws should be used for most materials, but for material

49、s where the use of these grips gives rise to excessive jaw breaks or slippage, capstan grips may be used.It is essential to choose jaw faces that limit slippage of the specimen, especially in stronger geosynthetics. Examples of jaw faces that have been found satisfactory are shown in Figure 3.5.2 Extensometer, capable of measuring the distance between two reference points on the specimen without any damage to the specimen or slippage, care being taken to ensure that the measurement represents the true movement of