SIST EN 14150:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Geosynthetic barriers - Determination of permeability to liquidsGéomembranes - Détermination de la perméabilité aux liquidesGeosynthetische Dichtungsbahnen - Bestimmung der FlüssigkeitsdurchlässigkeitTa slovenski standard je istoveten z:EN 14150:2006SIST EN 14150:2006en59.080.70GeotekstilijeGeotextilesICS:SLOVENSKI
STANDARDSIST EN 14150:200601-oktober-2006







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14150June 2006ICS 59.080.70 English VersionGeosynthetic barriers - Determination of permeability to liquidsGéomembranes - Détermination de la perméabilité auxliquidesGeosynthetische Dichtungsbahnen - Bestimmung derFlüssigkeitsdurchlässigkeitThis European Standard was approved by CEN on 4 May 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14150:2006: E



EN 14150:2006 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Principle.4 4 Apparatus.4 4.1 Cell.4 4.2 Volume measuring devices and pressure delivery system.5 4.3 Liquid supply.7 4.4 Temperature control.7 5 Specimens.8 6 Procedure.8 6.1 Installation.8 6.1.1 General.8 6.1.2 Type A volume measuring devices:.8 6.1.3 Type B volume measuring devices:.9 6.2 Preparation stages.9 6.2.1 General.9 6.2.2 First preparation stage.9 6.2.3 Second preparation stage.9 6.3 Test stage.10 7 Calculation.11 7.1 Preparation stages.11 7.2 Volume-temperature dependence coefficients.11 7.3 Test.11 7.4 Test validity.12 8 Test report.12 Bibliography.13



EN 14150:2006 (E) 3 Foreword This European Standard (EN 14150:2006) has been prepared by Technical Committee CEN/TC 189 “Geosynthetics”, the secretariat of which is held by IBN/BIN. 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 2006, and conflicting national standards shall be withdrawn at the latest by December 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, 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.



EN 14150:2006 (E) 4 1 Scope This European Standard specifies a method for measuring the steady-state liquid flow through a geosynthetic barrier, used to contain liquids in long-term applications. The test method and described apparatus allow the measurement of flows accurately down to 10-6 m3/m2/day. In particular circumstances where testing indicates that values obtained for a geosynthetic barrier lie below the threshold of sensitivity of this test method, then the value of liquid flow is declared as being less than
10-6 m3/m2/day. Due to its long duration this test method is not suitable for production control testing. Geosynthetic clay liners cannot be tested with this apparatus. 2 Normative references Not applicable 3 Principle A differential hydraulic pressure is applied between the two sides of a geosynthetic barrier. It is kept constant during the test at 100 kPa, the upstream pressure being set to 150 kPa, and the downstream pressure to
50 kPa. The flow through the geosynthetic barrier is calculated from the variations of the liquid volume measured on both sides of the geosynthetic barrier. NOTE 1 This test is conducted with water, but can also be performed with other liquids, providing chemical resistance and compatibility of the apparatus is ensured. NOTE 2 In the light of laboratory experience, test procedural improvement and equipment enhancement the sensitivity threshold of the test procedure should be reviewed and the applicability of the test procedure to the product permeability assessed at regular intervals, not exceeding 12 months. 4 Apparatus 4.1 Cell The two-part cell (see Figure 1) is made of stainless steel. The cell shall resist to oxidation during long-term immersion. In each part of the cell, a cavity allows to apply a hydraulic pressure. A porous disc placed in the downstream cavity prevents deformations of the geosynthetic barrier.



EN 14150:2006 (E) 5
Key 1 downstream part 2 upstream part 3 geosynthetic barrier 4 porous plate
U water inlet D water outlet FU flushing valve upstream FD flushing valve downstream Figure 1 — Schematic representation of a test cell The cell shall be designed to clamp the specimen without any leaks. There is no tightening system necessary, as clamping between flat surfaces is usually sufficient. For some materials, a sealant may be necessary. Any sealant non-sensitive to water and avoiding leaks can be used. In the case of bituminous geosynthetic barriers, a bitumen rubber sealant can be used. The measuring chambers shall have a nominal diameter equal to or greater than 200 mm. This diameter shall be measured with an accuracy equal to or better than 1 mm. The cell is equipped with a liquid inlet on the upstream part (U-valve) and a liquid outlet on the downstream part (D-valve) and flushing valves on each part (FU- and FD-valves). The cell should be oriented vertically to allow an easier and better air flushing. The flushing valves (FU and FD) should be placed on top of the cell and the inlet (U) and outlet (D) should be on the bottom of the cell. NOTE The cell can also include, on both parts, a ring-shaped control chamber. The downstream control chamber will be equipped with a porous ring-shaped plate. Each ring-shaped chamber will be connected to an independent volume measuring device and a pressure delivery system, in order to apply the same pressure as in the corresponding measuring chamber. These ring-shaped chambers are there to minimise deformation in the measuring chamber. 4.2 Volume measuring devices and pressure delivery system These two devices are generally associated. The volume measuring equipment shall be able to measure liquid flows through the geosynthetic barrier smaller than 10-6 m3 /m2/day. The accuracy of the volume measurement shall be at least 10-8 m3. The accuracy of the pressure applied on each side of the geosynthetic barrier shall be ± 2 kPa. The volume measurements can be achieved using capillary tubes (Type A device) or pressure-volume controllers (Type B device).



EN 14150:2006 (E) 6 — Type A (see Figure 2): 30 cm long tubes can be used. To reduce the effects of evaporation the tube diameter should be less than 3 mm. The pressure is applied by means of air pressure in capillary tubes and controlled with a regulator. A liquid vessel connected to the cell, between each capillary tube and the cell, allows the cavities to be filled before the test and enables the adjustment of liquid levels in capillary tubes during the test. Due to temperature effects on volume, tests performed with this kind of apparatus should be carried out in a thermostatic chamber (23 ± 0,2) °C.
Key 1 capillary tubes 2 vessel 3 upstream pressure 4 downstream pressure 5 thermostatic chamber (to ± 0,1 °C) 6 geosynthetic barrier
WU water regulator valve upstream WD water regulator valve downstream FU flushing valve upstream FD flushing valve downstream U water inlet D water outlet Figure 2 — Schematic representation of a Type A volume measuring device — Type B (see Figure 3): this device allows the application of a constant pressure when measuring the volume. It consists of a cylinder in which a piston slides. A numerically controlled motor enables the application of the required pressure by moving the piston
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