SIST EN ISO 10319:1999
(Main)Geotextiles - Wide-width tensile test (ISO 10319:1993)
Geotextiles - Wide-width tensile test (ISO 10319:1993)
This standard describes an index test method for the determination of the tensile properties (tensile strength, strain at failure, secant stiffness) of geotextiles and geotextile-related products, by using a wide width strip
Geotextilien - Zugversuch am breiten Streifen (ISO 10319:1993)
Diese Internationale Norm beschreibt ein Indexprüfverfahren zur Bestimmung der Zugfestigkeit von Geotextilien oder geotextilverwandten Produkten unter Verwendung eines breiten Streifens. Das Verfahren ist auf die meisten Geotextilien und geotextilverwandten Produkte, einschließlich gewebte Geotextilien, Vliesstoffe, Geoverbundstoffe, Maschenwaren und Filze anwendbar. Das Verfahren ist auch auf Geogitter anwendbar, jedoch müssen im Bedarfsfalle die Probenabmessungen geändert werden.
Géotextiles - Essai de traction des bandes larges (ISO 10319:1993)
Geotekstilije - Natezni preskus na širokih preskušancih (ISO 10319:1993)
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Geotekstilije - Natezni preskus na širokih preskušancih (ISO 10319:1993)Geotextilien - Zugversuch am breiten Streifen (ISO 10319:1993)Géotextiles - Essai de traction des bandes larges (ISO 10319:1993)Geotextiles - Wide-width tensile test (ISO 10319:1993)59.080.70GeotekstilijeGeotextilesICS:Ta slovenski standard je istoveten z:EN ISO 10319:1996SIST EN ISO 10319:1999en01-marec-1999SIST EN ISO 10319:1999SLOVENSKI
STANDARD
SIST EN ISO 10319:1999
SIST EN ISO 10319:1999
SIST EN ISO 10319:1999
INTERNATIONAL STANDARD ISO 10319 First edition 1993-04-15 Geotextiles - Wide-width tensile test Geotextiles - Essai de traction des bandes /arges Reference number ISO 10319:1993(E) SIST EN ISO 10319:1999
ISO 10319:1993(E) Foreword 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. Esch member 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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted 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. International Standard ISO 10319 was prepared by Technical Committee lSO/TC 38, Textiles, Sub-Committee SC 21, Geotextiles. 0 ISO 1993 All rights reserved. No patt of this publication may be reproduced or utilized in any form or by any means, electronie or mechanical, including photocopying and microfilm, without per- mission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-l 211 Geneve 20 l Switzerland Printed in Switzerland ii SIST EN ISO 10319:1999
INTERNATIONAL STANDARD ISO 10319:1993(E) Geotextiles - Wide-width tensile test 1 Scope This International Standard describes an index test method for determination of the tensile properties of geotextiles and related products, using a wide-width Strip. The method is applicable to most geotextiles, including woven fabrics, nonwovens, geocomposites, knitted fabrics and felts. The method is also applicable to geogrids, but specimen dimensions may need to be altered. This tensile test method covers the measurement of load elongation characteristics and includes pro- cedures for the calculation of secant stiffness, maxi- mum load per unit width and strain at maximum load. Singular Points on the load-extension curve are also indicated. Procedures for measuring the tensile properties of both conditioned and wet specimens are included. 2 Normative references The following Standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All Standards are subject to revision, and Parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most re- cent editions of the Standards indicated below. Members of IEC and ISO maintain registers of cur- rently valid International Standards. ISO 554: 1976, Standard atmospheres for conditioning and/or tes ting - Specifica tions. ISO 3301:1975, Statistical interpretation of data - Comparison of two means in the case of paired ob- serva tions. ISO 3696: 1987, Water for analytical laboratory use - Specifica tion and test me thods. ISO 7500-1:1986, Metallic materials - Verification of static uniaxial testing machines - Part 1: Tensile testing machines. ISO 9862:1990, Geotextiles - Sampling and prep- aration of test specimens. 3 Definitions 3.1 nominal gauge length (1) For measurement with an extensometer, the in- itial distance, normally 60 mm (30 mm on either side of the specimen’s symmetrical centre), between two reference Points located on the specimen parallel to the applied load. (2) For measurement by jaw displacement, the initial jaw Separation distance, normally 100 mm. 3.2 extension at preload: Measured increase in gauge length, expressed in millimetres, corresponding to an applied load of 1 % of the maximum figure 1). 3.3 true gauge length: Nominal gauge the extension at preload. 3.4 maximum load: Maximum tensile load (SA in ength plus forte, ex- pressed in kilonewtons, obtained during a test (see Point D in figure 1). 3.5 strain: Increase in true gauge length of a speci- men during true gauge 3.6 strain percentage, mum load. a test, expressed as a percentage of the ength. at maximum load: Strain, expressed in exhibited by the specimen under maxi- 3.7 secant stiffness: Ratio of load per unit width, in kilonewtons per metre, to a given value of strain. For example, at Point B in figure 1, secant stiffness = BC/CA. 3.8 tensile strength: Maximum strength per unit width, in kilonewtons per metre, observed during a test in which the specimen is stretched until it breaks. 1 SIST EN ISO 10319:1999
ISO 10319:1993(E) 3.9 strain rate: Percentage increase in true gauge length at maximum load, divided by the duration of the test, i.e. the time to attainment of maximum load from preload level. 4 Principle , A test specimen is held across its entire width in the jaws of a tensile testing machine operated at a given rate of strain, and a longitudinal forte applied to the test specimen until the specimen ruptures. The tensile properties of the test specimen are calculated from machine scales, dials, autographic recording Charts, or an interfaced Computer. The rate of strain is fixed at (20 + 5) % per minute for all geotextiles and related products. Most geotextiles tan be tested by this method. However, some modification of techniques may be necessary for particular geotextiles, e.g. strong geotextiles, meshes or geotextiles made from glass fibre, to prevent them from slipping in the jaws or being damaged as a result of being gripped in the jaws. The basic distinction between the present method and other methods for measuring tensile properties of fabrics is the width of the specimen. In the present method, the width is greater than the length of the specimen, as some geotextiles have a tendency to contract (“neck down”) under load in the gauge length area. The greater width reduces the con- traction effect of such fabrics and provides a relation- ship closer to expected fabric behaviour in the field, as well as a Standard for comparison of geotextiles. The basic test, for all kinds of geotextiles and geogrids, uses test specimens of 200 mm width and of 100 mm length (see 6.3.3 for details on preparation of geogrid specimens). When information on strain is required, extension measurements are made by means of an extensometer which follows the move- ment of two reference Points on the specimen. These reference Points are situated on the specimen sym- metry 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 tan be adapted for geogrids in Order to in- clude at least one row of nodes (see 6.3.3). Measurement of the extension of the test specimen is carried out by means of an extensometer. Alterna- tively, extension may be measured by jaw displace- ment if a calibration trial Shows no significant differente between jaw displacement and extensometer results. The significance of the differ- ence is determined by a Student t-distribution at sig- nificance Ievel of 95 %, as defined in ISO 3301. In such a case, the nominal gauge length is the distance between the jaws and is fixed at 100 mm. 5 Apparatus and reagents 5.1 Tensile testing machine (constant rate of ex- tension), complying with ISO 7500-1, in which the rate of increase of specimen length is uniform with time, fitted with jaws which are sufficiently wide to hold the entire width of the specimen and equipped with appropriate means to limit Slippage or darnage. NOTE 1 Compressive jaws should be used for most ma- terials, but for materials where the use of these grips gives rise to excessive jaw breaks or slippages, capstan grips may be used. lt is essential to choose jaw faces that limit Slippage of the specimen, especially in stronger geotextiles. Examples of jaw faces that have been found satis- factory are shown in figure 2. 5.2 Extensometer, capable of measuring the dis- tance between two reference Points on the specimen without any darnage to the specimen or Slippage, care being taken to ensure that the measurement rep- resents the true movement of the reference Points. Examples of extensometers include mechanical, op- tical, infrared or electrical devices. The accuracy of the extensometer shall comply with ISO 7500-1. If any irregularity of the stress-strain curve due to the extensometer is observed, this result shall be discarded and another specimen shall be tested. 5.3 Distilled water, for wet specimens only; see ISO 3696. 5.4 Nonionic wetting agent, for wet specimens only. 6 Test specimens 6.1 Number Cut a minimum of five test specimens in both the machine direction and the Cross direction. 6.2 Selection Select test specimens in accordance with ISO 9862. 6.3 Dimensions 6.3.1 Prepare each finished test specimen to a nominal 200 mm k 1 mm width (excluding fringes when applicable, see 6.3.2), and of sufficient length to ensure 100 mm between the jaws, with the length dimension being designated and parallel to the direc- tion in which the tensile forte is applied. Where ap- propriate and for monitoring any Slippage, draw two lines running the full width of the test specimen jaw 2 SIST EN ISO 10319:1999
ISO 10319:1993(E) faces, perpendicular to the length dimension and separated by 100 mm [except for capstan grips-see figure 2 c)]. 6.3.2 For woven.geotextiles, tut each specimen ap- proximately 220 mm wide and then make fringes by removing an equal number of threads from each side to obtain the 200 mm + 1 mm nominal specimen width. This helps to maintain the specimen integrity during the test. NOTE 2 When specimen integrity is not affected, the specimens may be initially tut to the finished width. 6.3.3 For geogrids, prepare each specimen at least 200 mm wide and sufficiently long to ensure a length of at least 100 mm. The test specimen shall contain at least one row of nodes or Cross-members, exclud- ing the nodes or Cross-members held in the jaws (see figure3),
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