SIST EN ISO 13431:2024

SLOVENSKI STANDARD
01-oktober-2024
Geotekstilije in geotekstilijam sorodni izdelki - Ugotavljanje obnašanja pri
nateznem lezenju in pretrgu zaradi lezenja (ISO 13431:2024)
Geotextiles and geotextile-related products - Determination of tensile creep and creep
rupture behaviour (ISO 13431:2024)
Geotextilien und geotextilverwandte Produkte - Bestimmung des Zugkriech- und des
Zeitstandbruchverhaltens (ISO 13431:2024)
Géotextiles et produits apparentés - Détermination du comportement au fluage en
traction et de la rupture au fluage en traction (ISO 13431:2024)
Ta slovenski standard je istoveten z: EN ISO 13431:2024
ICS:
59.080.70 Geotekstilije Geotextiles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 13431
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2024
EUROPÄISCHE NORM
ICS 59.080.70 Supersedes EN ISO 13431:1999
English Version
Geotextiles and geotextile-related products -
Determination of tensile creep and creep rupture
behaviour (ISO 13431:2024)
Géotextiles et produits apparentés - Détermination du Geotextilien und geotextilverwandte Produkte -
comportement au fluage en traction et de la rupture au Bestimmung des Zugkriech- und des
fluage en traction (ISO 13431:2024) Zeitstandbruchverhaltens (ISO 13431:2024)
This European Standard was approved by CEN on 6 August 2024.

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
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 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, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13431:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 13431:2024) 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 shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by February 2025, and conflicting national standards
shall be withdrawn at the latest by February 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 13431:1999.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 13431:2024 has been approved by CEN as EN ISO 13431:2024 without any modification.

International
Standard
ISO 13431
Second edition
Geotextiles and geotextile-related
2024-08
products — Determination of
tensile creep and creep rupture
behaviour
Géotextiles et produits apparentés — Détermination du
comportement au fluage en traction et de la rupture au fluage en
traction
Reference number
ISO 13431:2024(en) © ISO 2024
ISO 13431:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 13431:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Specimens. 3
4.1 Sampling .3
4.2 Number of specimens .3
4.3 Dimensions of specimens .3
4.4 Conditioning.4
5 Determination of tensile creep behaviour . 4
5.1 Principle .4
5.2 Apparatus .4
5.2.1 General .4
5.2.2 Specimen grips .4
5.2.3 Loading system .5
5.2.4 Strain measuring system .5
5.3 Procedure .5
5.3.1 Tensile characteristics .5
5.3.2 Technically representative width .5
5.3.3 Test loads .5
5.3.4 Specimens preparation .6
5.3.5 Measurements .6
6 Determination of tensile creep rupture . 6
6.1 Principle .6
6.2 Apparatus .6
6.2.1 General .6
6.2.2 Specimen grips .7
6.2.3 Loading system .7
6.2.4 Time recording system .7
6.3 Procedure .7
6.3.1 Wide-width tensile characteristics .7
6.3.2 Technically representative width .7
6.3.3 Load levels .7
6.3.4 Specimens preparation .8
6.3.5 Time recording.8
6.3.6 Graph .8
7 Calculations (for use of TRW specimens) . 8
7.1 General .8
7.2 Example 1 .8
7.3 Example 2 .9
8 Test report . 9

iii
ISO 13431:2024(en)
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. Each 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.
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 document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 221, Geosynthetics, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 189, Geosynthetics, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 13431:1999), which has been technically
revised.
The main changes are as follows:
— normative references have been updated;
— units have been added in the Notes to entry in Clause 3;
— the possibility of other test conditions, upon agreement by parties, have been added in 4.2, 5.3.3, 5.3.5;
— conditions for lateral contraction have been added in 4.3.3;
— figure keys have been slightly modified;
— charts of the recorded temperature and humidity have been added to the test report for the duration of
tests in Clause 8.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html

iv
International Standard ISO 13431:2024(en)
Geotextiles and geotextile-related products — Determination
of tensile creep and creep rupture behaviour
1 Scope
This document specifies a method for determining the tensile creep and creep rupture behaviour of
geotextiles and geotextile-related products in an unconfined situation.
Application of this document is limited to products and applications where the risk of collapse of a structure
due to premature failure or to strain and time variation of the reinforcement under constant load is of
essential importance.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 testing — Specifications
ISO 9862, Geosynthetics — Sampling and preparation of test specimens
ISO 10318-1, Geosynthetics — Part 1: Terms and definitions
ISO 10319, Geotextiles — Wide-width tensile test
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10318-1 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
tensile strength
maximum load per unit width, developed in a specific material subjected to an external tensile load, when
measured in accordance with ISO 10319
Note 1 to entry: Tensile strength is expressed in kilonewtons per metre (kN/m).
3.2
pre-tension force
F
p
tensile force, equal to 1 % of the tensile strength (3.1), but not more than 10 % of the tensile creep load (3.7),
applied to the specimen to enable the gauge length and strain zero to be determined under reproducible
conditions
Note 1 to entry: The pre-tension force is expressed in kilonewtons (kN).

ISO 13431:2024(en)
3.3
nominal gauge length
initial distance between two reference points located on the specimen parallel to the applied load before the
application of the pre-tension force (3.2)
Note 1 to entry: The gauge length should be set to be completely clear from the clamping devices. The gauge length
should be a representative part of the specimen, e.g. the gauge length for grid structures should be a whole number of
meshes or ribs.
Note 2 to entry: Nominal gauge length is expressed in mm.
3.4
technically representative width
TRW
small width that exhibits tensile strength and strain characteristics per unit width, under identical test
conditions and within ±5 % of tensile strength (3.1) and ±20 % of strain at the maximum load, of the values
measured in accordance with ISO 10319
Note 1 to entry: Technically representative width is expressed in millimetres.
3.5
tensile creep strain
time dependent change in tensile strain of a specimen subject to a constant tensile load
Note 1 to entry: Tensile creep strain is expressed as a percentage.
3.6
tensile creep rupture
tensile failure of a specimen subject to a constant tensile load, which is less than the tensile s
...