PD CEN TS 14416-2014


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PDCENTS14416 2014
BSI Standards Publication PD CEN/TS 14416:2014 Geosynthetic barriers — Test method for determining the resistance to rootsPD CEN/TS 14416:2014 PUBLISHED DOCUMENT National foreword This Published Document is the UK implementation of CEN/ TS 14416:2014. It supersedes DD CEN/TS 14416:2005 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee B/553, Geotextiles and geomembranes. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. © The British Standards Institution 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 83315 1 ICS 59.080.70 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 31 March 2014. Amendments issued since publication Date Text affectedPD CEN/TS 14416:2014TECHNICAL SPECIFICATION SPÉCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 14416 February 2014 ICS 59.080.70 Supersedes CEN/TS 14416:2005 English Version Geosynthetic barriers - Test method for determining the resistance to roots Barrières géosynthétiques - Méthode d'essai pour la détermination de la résistance aux racines Geosynthetische Dichtungsbahnen - Prüfverfahren zur Bestimmung des Widerstandes gegen Wurzeln This Technical Specification (CEN/TS) was approved by CEN on 9 December 2013 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. 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 © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 14416:2014 EPD CEN/TS 14416:2014 CEN/TS 14416:2014 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Principle 5 3 Apparatus .5 4 Procedure .5 5 Evaluation .6 6 Test report 6 Bibliography 7 PD CEN/TS 14416:2014 CEN/TS 14416:2014 (E) 3 Foreword This document (CEN/TS 14416:2014) has been prepared by Technical Committee CEN/TC 189 “Geosynthetics”, the secretariat of which is held by NBN. This document supersedes CEN/TS 14416:2005. 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. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: 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 the United Kingdom. PD CEN/TS 14416:2014 CEN/TS 14416:2014 (E) 4 Introduction This Technical Specification defines a method for testing the resistance of a geosynthetic barrier to penetration by roots. Such resistance is a requirement for many uses of geosynthetic barriers. This Technical Specification does not purport to address all safety problems, if any, associated with its use. PD CEN/TS 14416:2014 CEN/TS 14416:2014 (E) 5 1 Scope This Technical Specification describes a laboratory procedure for the rapid testing of the resistance of polymeric, bituminous or clay geosynthetic barriers to root penetration. It is suitable for testing of welded seams or other areas of potential weakness. A longer test that may be more suitable for testing the long-term resistance of geosynthetic barriers is described in EN 13948. 2 Principle A section of geosynthetic barrier is placed in soil into which seeds are sown. Six to eight weeks later the geosynthetic barrier is examined to see whether it has been penetrated by the roots of the young plants. 3 Apparatus The following equipment shall be used: — four dry unglazed clay flower pots approximately 220 mm high. The diameter at the base of the pot shall be approximately 140 mm, the diameter at the top 250 mm, and the angle between side and central axis approximately 13°. A 40 mm wide band shall be painted on the inside of the pot, about 100 mm above the base, and allowed to dry; — lime-free soil (pH 5 to 6), mixed with a little loam or high quality potting soil; Compost should not be used. — lupin seeds (lupinus alba); — silicone mastic sealant or mortar-sand mixture; — bitumen 85/40; — glass tubes; — anti-mould agent. 4 Procedure — Fill the pots with the soil as far as the lower edge of the painted band, then seal and humidify. — Cut three discs of geosynthetic barrier to cover the soil exactly. — Place the geosynthetic barrier on the soil of three of the pots with the upper side uppermost. — Carefully seal the gap between geosynthetic barrier and pot with the sealant or mortar-sand mixture. — Prepare the fourth pot in which the geosynthetic barrier is replaced by a 20 mm thick layer of bitumen 85/40 (oxidized grade bitumen with a softening point of (85 ± 5) °C and a penetration temperature of (40 ± 5) °C). — Cover the geosynthetic barrier or the bitumen with 90 mm of soil, then seal and humidify. PD CEN/TS 14416:2014 CEN/TS 14416:2014 (E) 6 — Sow 30 to 40 lupin seeds in each pot evenly on the soil, and pre-treat with anti-mould agent. — Cover the seeds with 10 mm of light soil. — In summer, place the pots outside. In winter, place them in a heated greenhouse with additional artificial light. Moisten the soil above the geosynthetic barrier or bitumen by pouring rain water as necessary into a glass tube that extends down as far as the geosynthetic barrier. If no rain water is available use a 1:1 mixture of tap water and distilled water. 5 Evaluation After six weeks (eight weeks in winter) empty the pots and inspect the upper and lower surface of the geosynthetic barrier for roots that have penetrated into it or through it. Inspect the bitumen layer. If the roots have not penetrated the bitumen, the test shall be repeated. NOTE This is a control of the vitality of the plants. 6 Test report The test report shall include the following information: a) reference to this Technical Specification and to the method; b) test laboratory; c) identification of the product tested; d) number of specimens; e) test duration; f) observed results, stating whether the roots have penetrated the geosynthetic barrier and the bitumen, accompanied by relevant photographs; g) date of testing. PD CEN/TS 14416:2014 CEN/TS 14416:2014 (E) 7 Bibliography [1] EN 13948, Flexible sheets for waterproofing - Bitumen, plastic and rubber sheets for roof waterproofing - Determination of resistance to root penetration [2] EN ISO 10318, Geosynthetics - Terms and definitions (ISO 10318) This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services. BSI is incorporated by Royal Charter. 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