Geotextiles and geotextile-related products - Determination of water permeability characteristics normal to the plane, without load (ISO 11058:2019)

This document specifies two test methods for determining the water permeability characteristics of a
single layer of geotextile or geotextile-related product normal to the plane:
a) the constant head method; and
b) the falling head method.

Geotextilien und geotextilverwandte Produkte - Bestimmung der Wasserdurchlässigkeit normal zur Ebene, ohne Auflast (ISO 11058:2019)

Dieses Dokument legt zwei Prüfverfahren zur Bestimmung der charakteristischen Wasserdurchlässigkeit eines einlagigen Geotextils oder geotextilverwandten Produktes normal zu seiner Ebene fest:
a)   das Verfahren mit konstanter Druckhöhe; und
b)   das Verfahren mit fallender Druckhöhe.

Géotextiles et produits apparentés - Détermination des caractéristiques de perméabilité à l'eau normalement au plan, sans contrainte mécanique (ISO 11058:2019)

Le présent document décrit deux méthodes d'essai pour déterminer la perméabilité à l'eau d'une couche d'un géotextile ou produit apparenté normalement à son plan:
a) la méthode à hauteur de charge constante; et
b) la méthode avec hauteur de charge variable décroissante.

Geotekstilije in geotekstilijam sorodni izdelki - Ugotavljanje prepustnosti za vodo pravokotno na ravnino, brez obremenitve (ISO 11058:2019)

Ta dokument določa metodi za ugotavljanje prepustnosti za vodo
ene plasti geotekstilije ali geotekstilijam sorodnega izdelka pravokotno na ravnino:
a) metoda s stalnim hidravličnim padcem; in
b) metoda s padajočim hidravličnim padcem.

General Information

Status
Published
Public Enquiry End Date
02-Jan-2018
Publication Date
14-Jul-2019
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
08-Jul-2019
Due Date
12-Sep-2019
Completion Date
15-Jul-2019

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SLOVENSKI STANDARD
SIST EN ISO 11058:2019
01-september-2019
Nadomešča:
SIST EN ISO 11058:2011

Geotekstilije in geotekstilijam sorodni izdelki - Ugotavljanje prepustnosti za vodo

pravokotno na ravnino, brez obremenitve (ISO 11058:2019)

Geotextiles and geotextile-related products - Determination of water permeability

characteristics normal to the plane, without load (ISO 11058:2019)

Geotextilien und geotextilverwandte Produkte - Bestimmung der Wasserdurchlässigkeit

normal zur Ebene, ohne Auflast (ISO 11058:2019)

Géotextiles et produits apparentés - Détermination des caractéristiques de perméabilité

à l'eau normalement au plan, sans contrainte mécanique (ISO 11058:2019)
Ta slovenski standard je istoveten z: EN ISO 11058:2019
ICS:
59.080.70 Geotekstilije Geotextiles
SIST EN ISO 11058:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 11058:2019
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SIST EN ISO 11058:2019
EN ISO 11058
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2019
EUROPÄISCHE NORM
ICS 59.080.70 Supersedes EN ISO 11058:2010
English Version
Geotextiles and geotextile-related products -
Determination of water permeability characteristics
normal to the plane, without load (ISO 11058:2019)

Géotextiles et produits apparentés - Détermination des Geotextilien und geotextilverwandte Produkte -

caractéristiques de perméabilité à l'eau normalement Bestimmung der Wasserdurchlässigkeit normal zur

au plan, sans contrainte mécanique (ISO 11058:2019) Ebene, ohne Auflast (ISO 11058:2019)

This European Standard was approved by CEN on 24 May 2019.

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, 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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11058:2019 E

worldwide for CEN national Members.
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SIST EN ISO 11058:2019
EN ISO 11058:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 11058:2019
EN ISO 11058:2019 (E)
European foreword

This document (EN ISO 11058:2019) 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 December 2019, and conflicting national standards

shall be withdrawn at the latest by December 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 11058:2010.

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, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 11058:2019 has been approved by CEN as EN ISO 11058:2019 without any modification.

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SIST EN ISO 11058:2019
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SIST EN ISO 11058:2019
INTERNATIONAL ISO
STANDARD 11058
Third edition
2019-05
Geotextiles and geotextile-related
products — Determination of water
permeability characteristics normal to
the plane, without load
Géotextiles et produits apparentés — Détermination des
caractéristiques de perméabilité à l'eau normalement au plan, sans
contrainte mécanique
Reference number
ISO 11058:2019(E)
ISO 2019
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SIST EN ISO 11058:2019
ISO 11058:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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 2019 – All rights reserved
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SIST EN ISO 11058:2019
ISO 11058:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Test specimens........................................................................................................................................................................................................ 1

4.1 Handling........................................................................................................................................................................................................ 1

4.2 Selection........................................................................................................................................................................................................ 1

4.3 Number and dimensions ................................................................................................................................................................ 2

4.4 Specimen conditions .......................................................................................................................................................................... 2

5 Constant head method .................................................................................................................................................................................... 2

5.1 Principle ........................................................................................................................................................................................................ 2

5.2 Apparatus .................................................................................................................................................................................................... 2

5.3 Procedure .................................................................................................................................................................................................... 3

5.4 Calculation and expression of results.................................................................................................................................. 4

6 Falling head method ......................................................................................................................................................................................... 4

6.1 Principle ........................................................................................................................................................................................................ 4

6.2 Apparatus .................................................................................................................................................................................................... 5

6.3 Procedure .................................................................................................................................................................................................... 6

6.4 Calculation and expression of results.................................................................................................................................. 6

7 Test report ................................................................................................................................................................................................................... 7

Annex A (informative) Determination of the correction factor, R , to a water temperature of

20 °C ................................................................................................................................................................................................................................11

Annex B (normative) Relationship between head loss and flow velocity ...................................................................13

Annex C (informative) Individual velocity index values for a head loss of 50 mm ............................................15

Annex D (informative) Experimental data and calculations ....................................................................................................16

© ISO 2019 – All rights reserved iii
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SIST EN ISO 11058:2019
ISO 11058:2019(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 third edition cancels and replaces the second edition (ISO 11058:2010), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— editorial modifications;
— formula corrections.

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 2019 – All rights reserved
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SIST EN ISO 11058:2019
INTERNATIONAL STANDARD ISO 11058:2019(E)
Geotextiles and geotextile-related products —
Determination of water permeability characteristics
normal to the plane, without load
1 Scope

This document specifies two test methods for determining the water permeability characteristics of a

single layer of geotextile or geotextile-related product normal to the plane:
a) the constant head method; and
b) the falling head method.
2 Normative references

The following referenced documents are referred to 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 2854, Statistical interpretation of data — Techniques of estimation and tests relating to means and

variances
ISO 5813, Water quality — Determination of dissolved oxygen — Iodometric method
ISO 9862, Geosynthetics — Sampling and preparation of test specimens
ISO 10320, Geosynthetics — Identification on site
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
velocity index
v-index

velocity corresponding to a head loss of 50 mm across a specimen, expressed to the nearest ±1 mm/s

4 Test specimens
4.1 Handling

The sample shall not be folded and shall be handled as infrequently as possible to avoid disturbance to

its structure. The sample shall be kept in a flat position without any load.
4.2 Selection
Test specimens shall be taken from the sample in accordance with ISO 9862.
© ISO 2019 – All rights reserved 1
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SIST EN ISO 11058:2019
ISO 11058:2019(E)
4.3 Number and dimensions

Five test specimens shall be cut from the sample, each of suitable dimensions for the water permeability

apparatus to be used.

If it is necessary to determine the results to within a given confidence interval of the mean, the number

of test specimens shall be determined in accordance with ISO 2854.
4.4 Specimen conditions

The specimens shall be clean, free from surface deposits and without visible damage or folding marks.

5 Constant head method
5.1 Principle

A single, unloaded layer of geotextile or geotextile-related product is subjected to a unidirectional flow

of water normal to the plane under a range of constant heads.
5.2 Apparatus

5.2.1 Apparatus in which it is possible to observe the presence of air bubbles on the surface of

the specimen, with an internal diameter of minimum 50 mm, conforming to the following requirements.

a) The apparatus shall be capable of applying a maximum head loss of at least 70 mm and maintaining

a constant head for the duration of each test with water on both sides of the specimen.

NOTE Some examples of apparatus are shown in Figure 1.

b) The mean internal diameter of the apparatus shall be known to an accuracy of at least 0,1 mm. The

exposed diameter of the specimen shall be the same as the internal diameter of the apparatus. The

diameter of the apparatus shall remain identical on both sides of the specimen over a length of at

least twice its internal diameter [see Figures 1 a) and 1 b)]. Abrupt changes in diameter shall be

avoided.

Alternatively [see Figure 1 c)], the outflow may discharge into a reservoir with a diameter of at

least four times the exposed diameter of the specimen. In this case, the distance from the geotextile

to the base of the reservoir shall be at least 1,5 times the exposed diameter of the specimen.

If the product shows an obvious pattern, this pattern shall be included at least three times along

any diameter of the specimen.

c) Where necessary, to avoid any visible deformation, a grid of 1 mm diameter wire and a mesh size of

(10 ± 1) mm shall be placed downstream of the specimen to support it during the test.

d) The head loss measured at any velocity when a test is performed without the test specimen, but

including any specimen-supporting grid, shall be less than 1 mm.
5.2.2 Water supply, of the following quality and condition.
a) The water shall be at a temperature of between 18 °C and 22 °C.

As the temperature correction (see Annex A) relates only to laminar flow, it is advisable to work at

temperatures as close as possible to 20 °C to minimize inaccuracies associated with inappropriate

correction factors, should the flow be non-laminar.
b) Water shall not be fed into the apparatus directly from a main supply due
...

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