EN 16416:2013
(Main)Geosynthetic clay barriers - Determination of water flux index - Flexible wall permeameter method at constant head
Geosynthetic clay barriers - Determination of water flux index - Flexible wall permeameter method at constant head
This European Standard describes an index test method that covers laboratory measurement of water flux through saturated clay geosynthetic barrier (GBR-C) specimens using a flexible wall permeameter at constant head.
This test method is applicable to GBR-C products with no additional sealing layers attached.
This test method provides a measurement of flux under a prescribed set of conditions that can be used for manufacturing quality control. The test method can also be used to check conformance.
The flux value determined using this test method is not considered to be representative of the in-service flux of a GBR-C.
Geosynthetische Tondichtungsbahnen - Bestimmung der Durchflussrate - Triaxialzellen-Methode mit konstanter Druckhöhe
Diese Europäische Norm beschreibt ein Index Prüfverfahren, das eine Labormessung der Durchflussrate von Wasser durch gesättigte Messproben einer geosynthetischen Tondichtungsbahn (GBR C) bei konstanter Druckhöhe unter Anwendung eines Durchlässigkeitsmessgerätes mit Triaxialzellen umfasst.
Dieses Prüfverfahren ist auf GBR C Produkte ohne aufgebrachte zusätzliche Dichtungsschicht anwendbar.
Dieses Prüfverfahren beschreibt eine Messung der Durchflussrate unter einem vorgeschriebenen Satz von Bedingungen, die zur Qualitätsüberwachung bei der Herstellung angewendet werden kann. Das Prüfverfahren kann außerdem zur Konformitätsprüfung angewendet werden.
Der nach diesem Prüfverfahren bestimmte Wert der Durchflussrate wird nicht als repräsentativ für die Durchflussrate einer im Einsatz befindlichen GBR C angesehen.
Barrières géosynthétiques argileuses - Détermination de l'indice eau par analyse en flux - Méthode au perméamètre à paroi flexible de charge constante
La présente Norme européenne décrit une méthode d'essai index relative à la mesure en laboratoire du flux d'eau au travers d'éprouvettes de géosynthtéiques bentonitiques (GSB) saturés, utilisant un perméamètre à paroi flexible à charge constante.
Cette méthode d'essai est applicable aux géosynthétiques bentonitiques sans couches d'étanchéité supplémentaires attachées.
Cette méthode d'essai permet de mesurer le flux dans un ensemble de conditions prescrites qui peut être utilisée pour le contrôle de qualité de la fabrication. La méthode d'essai peut également être utilisée pour vérifier la conformité.
La valeur du flux déterminée à l'aide de cette méthode d'essai n'est pas considérée comme étant représentative du flux en service d'un GSB.
Geosintetične glinene pregrade - Ugotavljanje indeksa vodnega pretoka - Metoda s permeametrom (merilnikom prepustnosti) z gibko steno pri konstantnem vodnem tlaku
Ta evropski standard opisuje metodo za preskušanje indeksa, ki zajema laboratorijsko merjenje vodnega pretoka skozi nasičene vzorce geosintetične glinene pregrade (GBR-C) s permeametrom (merilnikom prepustnosti) z gibko steno pri konstantnem vodnem tlaku. Ta preskusna metoda se uporablja za izdelke GBR-C brez dodatnih tesnilnih plasti. Ta preskusna metoda omogoča merjenje pretoka pri predpisanem naboru pogojev, ki se lahko uporablja za kontrolo kakovosti proizvodnje. Preskusna metoda se lahko uporablja tudi za preverjanje skladnosti. Vrednost pretoka, določena s to preskusno metodo, se ne šteje kot reprezentativna za pretok med obratovanjem GBR-C.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.WODNXGeosynthetische Tondichtungsbahnen - Bestimmung der Durchflussrate - Triaxialzellen-Methode mit konstanter DruckhöheBarrières géosynthétiques argileuses - Détermination de l'indice eau par analyse en flux - Méthode au perméamètre à paroi flexible de charge constanteGeosynthetic clay barriers - Determination of water flux index - Flexible wall permeameter method at constant head91.100.50Veziva. Tesnilni materialiBinders. Sealing materials59.080.70GeotekstilijeGeotextilesICS:Ta slovenski standard je istoveten z:EN 16416:2013SIST EN 16416:2013en,fr,de01-november-2013SIST EN 16416:2013SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16416
September 2013 ICS 59.080.70; 91.100.50 English Version
Geosynthetic clay barriers - Determination of water flux index - Flexible wall permeameter method at constant head
Barrières géosynthétiques argileuses - Détermination de l'indice eau par analyse en flux - Méthode au perméamètre à paroi flexible de charge constante
Geosynthetische Tondichtungsbahnen - Bestimmung der Durchflussrate - Triaxialzellen-Methode mit konstanter Druckhöhe This European Standard was approved by CEN on 10 August 2013.
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, 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:
Avenue Marnix 17,
B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16416:2013: ESIST EN 16416:2013
Hydraulic conductivity calculation. 11 Annex B (informative)
Permittivity calculation (based on ASTM D 4491) . 12 Bibliography . 13
flux volumetric flow rate per unit area normal to the plane of the product at a defined head
[SOURCE: EN ISO 10318, 4.3.3] 4 Apparatus The apparatus shall consist of the following. 4.1 Constant head hydraulic system 4.1.1 General The system shall be capable of maintaining constant hydraulic pressures to within ± 2,5 % and shall include means to measure the hydraulic pressures to within the prescribed tolerance. In addition, the system shall be capable of maintaining a constant head loss across the test specimen to within ± 5 % and shall include means to measure the head loss with the same accuracy or better.
± 2,5 % of the applied pressure. The back pressure may be provided by a compressed gas supply, a deadweight acting on a piston, or any other method capable of applying and controlling the back pressure to the tolerance specified in this paragraph. NOTE Application of gas pressure directly to a liquid will dissolve gas in the liquid. A variety of techniques are available to minimise dissolution of gas in the back pressure liquid, including separation of gas and liquid phases with a bladder and frequent replacement of the liquid with de-aired water. 4.2 Flow Measurement System 4.2.1 Accuracy of inflow and outflow Both inflow and outflow volumes shall be measured unless the lack of leakage, continuity of flow, and cessation of consolidation or swelling can be verified by other means. Required accuracy for the flow measured over an interval of time is ± 5 %. 4.2.2 De-airing and compliance of the system The flow-measurement system shall contain a minimum of dead space and be capable of complete and rapid de-airing. Rigid tubing shall be used so that volume change of the system in response to changes in pressure is minimised. 4.3 Permeameter cell pressure system The system for pressurising the permeameter cell shall be capable of applying and maintaining the cell pressure to within ± 2,5 % of the applied pressure. However, the effective stress on the test specimen shall be maintained to the desired value with an accuracy of ± 5 %. The device for pressurising the cell may consist of a reservoir connected to the permeameter cell and partially filled with de-aired water, with the upper part of the reservoir connected to a compressed gas supply or other source of pressure (see NOTE).
NOTE De-aired water is commonly used for the cell liquid to minimise potential for diffusion of air through the membrane into the specimen. Other liquids, such as oils, which have low gas solubilities, are also acceptable, provided they do not react with components of the permeameter and the flexible membrane. The use of a long (approximately 5 m to 7 m) tube connecting the pressurised cell liquid to the cell can help delay the appearance of air in the cell liquid and to reduce the flux of dissolved air into the cell. 4.4 Permeameter Cell An apparatus shall be provided in which the specimen and porous end pieces, enclosed by a flexible membrane sealed to the cap and base, are subjected to controlled liquid pressures. A schematic diagram of a typical cell is shown in Figure 1. The permeameter cell shall allow for observation of changes in height of the specimen, either by observation through the cell wall using a suitable instrument or by monitoring of either a loading piston or an extensometer extending through the top plate of the cell bearing on the top cap and attached to a suitable measuring device.
The piston or extensometer – if used – shall pass through a bushing and seal incorporated into the top plate and shall be loaded with sufficient force to compensate for the cell pressure acting over the cross-sectional area of the piston where it passes through the seal. If deformations are measured, the deformation indicator SIST EN 16416:2013
Key 1 permeameter cell 2 porous end pieces 3 specimen 4 rubber O-rings 5 filter paper
6 back pressure system 7 outflow volume measuring device 8 inflow volume measuring device 9 vent lines
Figure 1 — Permeameter cell and test set-up 4.6 Flexible membranes The flexible membrane used to encase the specimen shall provide reliable protection against leakage. The membrane shall be carefully inspected prior to use and if any flaws or pinholes are evident, the membrane shall be discarded. To minimise restraint of the specimen, the diameter or width of the unstretched membrane shall be between 90 % and 95 % of that of the specimen. The membrane shall be sealed to each of the SIST EN 16416:2013
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