SIST EN ISO 11058:2011
(Main)Geotextiles and geotextile-related products - Determination of water permeability characteristics normal to the plane, without load (ISO 11058:2010)
Geotextiles and geotextile-related products - Determination of water permeability characteristics normal to the plane, without load (ISO 11058:2010)
This European Standard specifies two test methods for determining the water permeability characteristics of a single layer of geotextile or geotextile-related product normal to the plane: the constant head method and the falling head method. Note: If the full permeability characteristics of the geotextile or geotextile-related product have previously been established, then for control purposes it can be sufficient to determine the velocity index at a head loss of 50 mm only.
Geotextilien und geotextilverwandte Produkte - Bestimmung der Wasserdurchlässigkeit normal zur Ebene, ohne Auflast (ISO 11058:2010)
Diese Internationale Norm legt zwei Prüfverfahren zur Bestimmung der Wasserdurchlässigkeit eines einlagigen
Geotextils oder geotextilverwandten Produktes normal zu seiner Ebene fest:
a) das Verfahren mit konstanter Druckhöhe;
b) das Verfahren mit fallender Druckhöhe.
ANMERKUNG Wenn der volle Umfang der charakteristischen Wasserdurchlässigkeit eines Geotextils oder geotextilverwandten
Produktes schon einmal ermittelt worden ist, kann es für Kontrollzwecke genügen, den Geschwindigkeitsindex
bei einem hydraulischen Höhenunterschied von nur 50 mm zu bestimmen.
Géotextiles et produits apparentés - Détermination des caractéristiques de perméabilité à l'eau normalement au plan, sans contrainte mécanique (ISO 11058:2010)
L'ISO 11058:2010 spécifie deux méthodes d'essai pour déterminer la perméabilité à l'eau d'une couche d'un géotextile ou produit apparenté normalement à son plan:
la méthode à hauteur de charge constante;
la méthode à hauteur de charge variable décroissante.
Geotekstilije in geotekstilijam sorodni izdelki - Ugotavljanje prepusnosti za vodo pravokotno na ravnino, brez obremenitve (ISO 11058:2010)
Ta evropski standard določa dve preskusni metodi za ugotavljanje značilnosti prepustnosti za vodo enojne plasti geotekstilij ali geotekstilijam sorodnega izdelka pravokotno na ravnino: metoda s stalno višino in metoda s padajočo višino. Opomba: Če so bile že prej vzpostavljene značilnosti polne prepustnosti geotekstilij ali geotekstilijam sorodnega izdelka, je lahko za potrebe kontrole dovolj določiti indeks hitrosti samo pri višinski izgubi 50 mm.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 11058:2011
01-november-2011
1DGRPHãþD
SIST EN ISO 11058:1999
Geotekstilije in geotekstilijam sorodni izdelki - Ugotavljanje prepusnosti za vodo
pravokotno na ravnino, brez obremenitve (ISO 11058:2010)
Geotextiles and geotextile-related products - Determination of water permeability
characteristics normal to the plane, without load (ISO 11058:2010)
Geotextilien und geotextilverwandte Produkte - Bestimmung der Wasserdurchlässigkeit
normal zur Ebene, ohne Auflast (ISO 11058:2010)
Géotextiles et produits apparentés - Détermination des caractéristiques de perméabilité
à l'eau normalement au plan, sans contrainte mécanique (ISO 11058:2010)
Ta slovenski standard je istoveten z: EN ISO 11058:2010
ICS:
59.080.70 Geotekstilije Geotextiles
SIST EN ISO 11058:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 11058:2011
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SIST EN ISO 11058:2011
EUROPEAN STANDARD
EN ISO 11058
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2010
ICS 59.080.70 Supersedes EN ISO 11058:1999
English Version
Geotextiles and geotextile-related products - Determination of
water permeability characteristics normal to the plane, without
load (ISO 11058:2010)
Géotextiles et produits apparentés - Détermination des Geotextilien und geotextilverwandte Produkte -
caractéristiques de perméabilité à l'eau normalement au Bestimmung der Wasserdurchlässigkeit normal zur Ebene,
plan, sans contrainte mécanique (ISO 11058:2010) ohne Auflast (ISO 11058:2010)
This European Standard was approved by CEN on 15 March 2010.
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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11058:2010: E
worldwide for CEN national Members.
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SIST EN ISO 11058:2011
EN ISO 11058:2010 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 11058:2011
EN ISO 11058:2010 (E)
Foreword
This document (EN ISO 11058:2010) 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 October 2010, and conflicting national standards shall be withdrawn at
the latest by October 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11058:1999.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 11058:2010 has been approved by CEN as a EN ISO 11058:2010 without any modification.
3
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SIST EN ISO 11058:2011
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SIST EN ISO 11058:2011
INTERNATIONAL ISO
STANDARD 11058
Second edition
2010-04-01
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 11058:2010(E)
©
ISO 2010
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SIST EN ISO 11058:2011
ISO 11058:2010(E)
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ii © ISO 2010 – All rights reserved
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SIST EN ISO 11058:2011
ISO 11058:2010(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Test specimens.2
4.1 Handling .2
4.2 Selection.2
4.3 Number and dimensions.2
4.4 Condition of specimens.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.12
T
Annex B (informative) Relationship between head loss and flow velocity.14
Annex C (informative) Velocity index.16
Annex D (informative) Experimental data and calculations .17
© ISO 2010 – All rights reserved iii
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SIST EN ISO 11058:2011
ISO 11058:2010(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
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.
ISO 11058 was prepared by Technical Committee ISO/TC 221, Geosynthetics.
This second edition cancels and replaces the first edition (ISO 11058:1999), which has been technically
revised.
iv © ISO 2010 – All rights reserved
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SIST EN ISO 11058:2011
INTERNATIONAL STANDARD ISO 11058:2010(E)
Geotextiles and geotextile-related products — Determination of
water permeability characteristics normal to the plane, without
load
1 Scope
This International Standard 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;
b) the falling head method.
NOTE If the full permeability characteristics of the geotextile or geotextile-related product have previously been
established, then for control purposes it can be sufficient to determine the velocity index at a head loss of 50 mm only.
2 Normative references
The following referenced documents are indispensable for the application 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, Geotextiles and geotextile-related products — Identification on site
3 Terms and definitions
For the purposes of this document the following terms and definitions apply.
3.1
velocity index
V
H50
velocity corresponding to a head loss of 50 mm across a specimen, expressed to the nearest ±1 mm/s
© ISO 2010 – All rights reserved 1
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SIST EN ISO 11058:2011
ISO 11058:2010(E)
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
Take specimens from the sample according to ISO 9862.
4.3 Number and dimensions
Cut five test specimens 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 Condition of specimens
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, complying with the following requirements.
a) The apparatus shall be capable of installing 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. It shall be capable
of achieving a constant water head of up to 250 mm.
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.
2 © ISO 2010 – All rights reserved
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SIST EN ISO 11058:2011
ISO 11058:2010(E)
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.
NOTE 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 may not be fed into the apparatus directly from a mains supply due to problems caused by the
release of air bubbles, which can be entrapped in the structure of the specimen. The water should
preferably be de-aired or fed from a stilling tank. The water should not be continuously recycled.
c) The oxygen content shall not exceed 10 mg/kg. The oxygen content shall be measured at the point at
which the water enters the apparatus.
d) The water shall be filtered if suspended solids are visible to the naked eye or if solids accumulate on or in
the specimen, thus reducing the flow with time.
5.2.3 Dissolved-oxygen meter, or apparatus complying with ISO 5813.
5.2.4 Stopwatch, with an accuracy of 0,2 s.
5.2.5 Thermometer, with an accuracy of 0,5 °C.
5.2.6 Measuring vessel, of appropriate size for determining the volume of water to an accuracy of 1 % of
the capacity of the vessel.
When the water flow is determined by volume, use a mea
...
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