oSIST prEN ISO 13431:2023

SLOVENSKI STANDARD
oSIST prEN ISO 13431:2023
01-julij-2023
Geotekstilije in geotekstilijam sorodni izdelki - Ugotavljanje obnašanja pri lezenju
in pretrgu zaradi lezenja (ISO/DIS 13431:2023)
Geotextiles and geotextile-related products - Determination of tensile creep and creep
rupture behaviour (ISO/DIS 13431:2023)
Geotextilien und geotextilverwandte Produkte - Bestimmung des Zugkriech- und des
Zeitstandbruchverhaltens (ISO/DIS 13431:2023)
Géotextiles et produits apparentés - Détermination du comportement au fluage en
traction et de la rupture au fluage en traction (ISO/DIS 13431:2023)
Ta slovenski standard je istoveten z: prEN ISO 13431
ICS:
59.080.70 Geotekstilije Geotextiles
oSIST prEN ISO 13431:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 13431:2023

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oSIST prEN ISO 13431:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 13431
ISO/TC 221 Secretariat: BSI
Voting begins on: Voting terminates on:
2023-06-01 2023-08-24
Geotextiles and geotextile-related 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
ICS: 59.080.70
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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BE CONSIDERED IN THE LIGHT OF THEIR
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WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 13431:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

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oSIST prEN ISO 13431:2023

DRAFT INTERNATIONAL STANDARD
ISO/DIS 13431
ISO/TC 221 Secretariat: BSI
Voting begins on: Voting terminates on:

Geotextiles and geotextile-related 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
ICS: 59.080.70
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
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NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 13431:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
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NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
  © ISO 2023 – All rights reserved
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

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oSIST prEN ISO 13431:2023
ISO/DIS 13431:2023(E)
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 . 5
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 . 6
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 . 7
6.2.1 General . 7
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 . 8
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 Example 1 . 9
7.2 Example 2 . 9
8 Test report . 9
iii
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oSIST prEN ISO 13431:2023
ISO/DIS 13431:2023(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. 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 documents 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/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.
This fourth edition cancels and replaces the third edition (ISO 13431:1999), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— normative references have been updated in Section 2;
— In clause 3 units have been added in Note for each entry;
— In clause 4.2, 5.3.3, 5.3.5 the possibility of other test conditions, upon agreement by Parties, has
been added;
— in clause 4.3.3 conditions for lateral contraction have been added;
— key of figures has been slightly modified;
— in clause 8 the "Test Report" contains also charts of the recorded temperature and humidity for the
whole duration of tests.
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
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oSIST prEN ISO 13431:2023
DRAFT INTERNATIONAL STANDARD ISO/DIS 13431:2023(E)
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 standard is limited to those products and applications where the risk of collapse of a
structure due to premature failure or to strain/time variation of the reinforcement under constant load
is of essential importance.
As the test is carried out over a long period of time and the procedure is complex, it is therefore
recommended that the test is not considered to be a routine quality control test. The results of the test
cannot be representative of the performance of the products when subject to soil pressures.
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
EN ISO 9862, Geosynthetics — Sampling and preparation of test specimens
EN ISO 10318-1, Geosynthetics - Part 1: Terms and definitions
EN ISO 10319, Geotextiles - Wide-width tensile test
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in EN 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 EN ISO 10319.
Note 1 to entry: Tensile strength is expressed in kilonewtons per metre (kN/m).
1
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oSIST prEN ISO 13431:2023
ISO/DIS 13431:2023(E)
3.2
pre-tension force
F
p
tensile force, equal to 1 % of the tensile strength, but not more than 10 % of the tensile creep load,
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).
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. 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. for
grid structures the gauge length should be a whole number of meshes or ribs.
Note 1 to entry: nominal gauge length is expressed in mm.
3.4
technically representative width
TRW
A small width, that exhibits tensile strength/ strain characteristics per unit width, under identical test
conditions, within ± 5% for tensile strength and ± 20% for strain at the maximum load, of the values
measured in accordance with EN ISO 10319.
Note 1 to entry: technically representative width is expressed in mm.
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 in %.
3.6
tensile creep rupture
Tensile failure of a specimen subject to a constant tensile load, which is less than the tensile strength.
Note 1 to entry: In some materials tensile creep rupture is preceded by an increasing rate of strain.
3.7
tensile creep load
Constant tensile static load per unit width, applied to the specimen.
Note 1 to entry: The tensile creep load is usually expressed as a percentage of the tensile strength of the sample.
The tensile creep load includes the preload and, if applicable, any load due to the loading device.
Note 2 to entry: tensile creep load is expressed in kilonewtons per metre (kN/m).
3.8
loading time
Time required to apply the full tensile creep load.
Note 1 to entry: loading time is expressed in seconds.
3.9
creep time
Time elapsed from the end of the loading time.
Note 1 to entry: creep time is expressed in hours.
2
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oSIST prEN ISO 13431:2023
ISO/DIS 13431:2023(E)
3.10
time to creep rupture
Time elapsed from the end of the loading time until tensile creep rupture of the specimen.
Note 1 to entry: time to creep rupture is expressed in hours.
3.11
initial strain
Change in the gauge length (strain), measured on
...