SIST EN ISO 13438:2019

SLOVENSKI STANDARD
SIST EN ISO 13438:2019
01-marec-2019
1DGRPHãþD
SIST EN ISO 13438:2005
Geosintetika - Preskusna presejalna metoda za ugotavljanje odpornosti
geotekstilij in geotekstilijam sorodnih izdelkov proti oksidaciji (ISO 13438:2018)
Geosynthetics - Screening test method for determining the resistance of geotextiles and
geotextile-related products to oxidation (ISO 13438:2018)
Geotextilien und geotextilverwandte Produkte - Auswahlprüfverfahren zur Bestimmung
der Oxidationsbeständigkeit (ISO 13438:2018)
Géosynthétiques - Méthode de détermination de la résistance des géotextiles et produits
apparentés à l'oxydation (ISO 13438:2018)
Ta slovenski standard je istoveten z: EN ISO 13438:2018
ICS:
59.080.70 Geotekstilije Geotextiles
SIST EN ISO 13438:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 13438:2019

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SIST EN ISO 13438:2019


EN ISO 13438
EUROPEAN STANDARD

NORME EUROPÉENNE

December 2018
EUROPÄISCHE NORM
ICS 59.080.70 Supersedes EN ISO 13438:2004
English Version

Geosynthetics - Screening test method for determining the
resistance of geotextiles and geotextile-related products to
oxidation (ISO 13438:2018)
Géosynthétiques - Méthode de détermination de la Geotextilien und geotextilverwandte Produkte -
résistance des géotextiles et produits apparentés à Auswahlprüfverfahren zur Bestimmung der
l'oxydation (ISO 13438:2018) Oxidationsbeständigkeit (ISO 13438:2018)
This European Standard was approved by CEN on 3 December 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13438:2018 E
worldwide for CEN national Members.

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SIST EN ISO 13438:2019
EN ISO 13438:2018 (E)
Contents Page
European foreword . 3

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SIST EN ISO 13438:2019
EN ISO 13438:2018 (E)
European foreword
This document (EN ISO 13438:2018) 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 June 2019, and conflicting national standards shall be
withdrawn at the latest by June 2019.
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 13438:2004.
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 Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 13438:2018 has been approved by CEN as EN ISO 13438:2018 without any modification.


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SIST EN ISO 13438:2019

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SIST EN ISO 13438:2019
INTERNATIONAL ISO
STANDARD 13438
Second edition
2018-11
Geosynthetics — Screening test
method for determining the resistance
of geotextiles and geotextile-related
products to oxidation
Géosynthétiques — Méthode de détermination de la résistance des
géotextiles et produits apparentés à l'oxydation
Reference number
ISO 13438:2018(E)
©
ISO 2018

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SIST EN ISO 13438:2019
ISO 13438:2018(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

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SIST EN ISO 13438:2019
ISO 13438:2018(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Method A . 1
4.1 Principle . 1
4.2 Specimens . 2
4.3 Apparatus for oven testing . 2
4.4 Test procedure . 2
4.4.1 Leaching . 2
4.4.2 Exposure in air . 3
5 Method B for PVAL . 4
5.1 Principle for first evaluation of service lives . 4
5.2 Apparatus and reagents . 4
5.2.1 Apparatus . 4
5.2.2 Reagents . 4
5.2.3 Specimens . 4
5.3 Test procedure . 5
5.3.1 Quantity of test liquid and of gas phase . 5
5.3.2 Positioning and installing the specimens . 5
5.3.3 Test conditions. 5
5.3.4 Procedure during exposure . 6
5.3.5 Removing the specimens . 6
5.3.6 Control specimens . 6
5.4 Principle for follow up procedure . 6
6 Determination of mechanical properties . 6
7 Test report . 7
Bibliography . 8
© ISO 2018 – All rights reserved iii

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SIST EN ISO 13438:2019
ISO 13438:2018(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).
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 identifying 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 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 second edition cancels and replaces the first edition (ISO 13438:2004), which has been technically
revised. The main changes compared to the previous edition are as follows:
— procedural guidance regarding the use of exposure ovens has been added;
— procedural guidance regarding the use of autoclaves has been added.
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 © ISO 2018 – All rights reserved

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SIST EN ISO 13438:2019
ISO 13438:2018(E)

Introduction
In many civil engineering applications, geotextiles and geotextile-related products can come into
contact with water or aqueous solutions present in the soil environment. At the same time, in specific
parts of the construction, they can be exposed to oxygen, giving rise to oxidative degradation processes.
These processes are usually very slow.
Polyolefin materials, such as polypropylene (PP) and polyethylene (PE), are inherently more sensitive
to oxidation than those based on polyethylene terephthalate (PET). Other polymers, such as poly(vinyl
alcohol) (PVAL according to ISO 1043-1), are also sensitive to oxidation in specific conditions (aqueous
media with oxidizing agent). This behaviour can be improved very effectively by the use of appropriate
stabilizing additives.
It is the purpose of this document to provide a method for screening the resistance to oxidation of
geotextiles and geotextile-related products in service for 25, 50 and 100 years. In order to achieve
the sufficiently short exposure times needed for screening tests, the oxidative degradation process
is accelerated. This acceleration can be achieved either by raising the temperature or by increasing
the concentration of the active reaction partner. Raising the temperature can lead to the oxidation
rate being limited by oxygen diffusion, thus invalidating the acceleration. This applies particularly
to materials with a low surface-to-volume ratio and less to nonwovens made from fine fibres. Two
methods are therefore proposed.
Method A (which was Method B in the previous edition) uses temperature alone as the accelerating
factor and is used for PE, PP, PA and AR.
Method B operates at moderately high temperatures and, at the same time, the oxygen concentration is
increased by using pure oxygen at high pressure. Method B is used for PVAL.
© ISO 2018 – All rights reserved v

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SIST EN ISO 13438:2019

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SIST EN ISO 13438:2019
INTERNATIONAL STANDARD ISO 13438:2018(E)
Geosynthetics — Screening test method for determining
the resistance of geotextiles and geotextile-related
products to oxidation
1 Scope
This document specifies a screening test method for determining the re
...