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1、DRAFT FOR DEVELOPMENT DD CEN/TS 14416:2005 Geosynthetic barriers Test method for determining the resistance to roots ICS 59.080.70 ? Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:25:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD CEN/TS 14416:2005 This Bri
2、tish Standard was published under the authority of the Standards Policy and Strategy Committee on 5 December 2005 BSI 5 December 2005 ISBN 0 580 47094 6 National foreword This Draft for Development is the official English language version of CEN/TS 14416:2005. This publication is not to be regarded
3、as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature because the experts could not reach a consensus at this stage. It should be applied on this provisional basis, so that information and experience of its practical application
4、may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the European organization responsible for its conversion to a European standard. A review of this publication will be initiated 2 years after its publication by the Eur
5、opean organization so that a decision can be taken on its status at the end of its 3-year life. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards. According to the replies received by the end of the review period, the responsi
6、ble BSI Committee will decide whether to support the conversion into a European Standard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent in writing to the Secretary of BSI Technical Committee B/553, Geosynthetics, at British Standards House, 389 Chiswick
7、 High Road, London W4 4AL, giving the document reference and clause number and proposing, where possible, an appropriate revision of the text. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement int
8、ernational or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not pu
9、rport to include all the necessary provisions of a contract. Users are responsible for its correct application. Summary of pages This document comprises a front cover, an inside front cover, the CEN/TS title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed in this document ind
10、icates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:25:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZ
11、IFIKATION CEN/TS 14416 October 2005 ICS 59.080.70 English Version Geosynthetic barriers - Test method for determining the resistance to roots Gomembranes et gosynthtiques bentonitiques - Mthode dessai pour la dtermination de la rsistance aux racines Geosynthetische Dichtungsbahnen - Prfverfahren zur
12、 Bestimmung des Widerstandes gegen Wurzeln This Technical Specification (CEN/TS) was approved by CEN on 28 December 2004 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 commen
13、ts, 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
14、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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greec
15、e, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre:
16、 rue de Stassart, 36 B-1050 Brussels 2005 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 14416:2005: E Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:25:36 GMT+00:00 2006, Uncontrolled
17、Copy, (c) BSI 2 Contents Page Foreword 3 Introduction4 1 Scope .5 2 Normative references .5 3 Principle.5 4 Apparatus 5 5 Procedure 5 6 Evaluation6 7 Test report .6 Bibliography.7 CEN/TS 14416:2005 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:25:36 GMT+00:
18、00 2006, Uncontrolled Copy, (c) BSI 3 Foreword This Technical Specification (CEN/TS 14416:2005) has been prepared by Technical Committee CEN/TC 189 “Geosynthetics”, the secretariat of which is held by IBN. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
19、 following countries are bound to announce this CEN Technical Specification: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia
20、, Spain, Sweden, Switzerland and United Kingdom. CEN/TS 14416:2005 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:25:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 Introduction This Technical Specification defines a method for testing the resistance of the
21、geosynthetic barrier to penetration by roots. Such resistance is a requirement for many uses of geosynthetic barriers. The standard does not purport to address all of the safety problems, if any, associated with its use. CEN/TS 14416:2005 Licensed Copy: London South Bank University, London South Ban
22、k University, Tue Dec 12 05:25:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 1 Scope This CEN Technical Specification covers a laboratory procedure for the testing of the resistance of polymeric, bituminous or clay geosynthetic barriers to root penetration. 2 Normative references Not applicable. 3
23、 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. 4 Apparatus The following equipment shall be used: four dry unglazed clay fl
24、ower pots approximately 220 mm high. The diameter of the base of the flower pot shall be approximately 140 mm, the diameter of the top 250 mm, and the cone angle (angle between side and central axis) approximately 13. A band about 40 mm wide shall be painted on the inside of the pot, about 100 mm ab
25、ove the base, and allowed to dry; lime-free soil (pH 5 to 6), mixed with a little loam; NOTE Compost should not be used; seeds of lupin (lupinus alba); silicone mastic sealant; bitumen 85/40; glass tubes. 5 Procedure Fill the pots with the soil as far as the lower edge of the painted band. Cut three
26、 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. Prepare the fourth pot in which the geosynthetic barrier is replaced
27、by a 20 mm thick layer of bitumen 85/40. NOTE 85/40 is an oxidized grade bitumen with a softening point of (85 5) C and a penetration temperature of (40 5) C. CEN/TS 14416:2005 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:25:36 GMT+00:00 2006, Uncontrolled
28、 Copy, (c) BSI 6 Cover the geosynthetic barrier or the bitumen with 90 mm of soil. Sow 30 to 40 lupin seeds in each pot evenly on the soil. Cover the seeds with 10 mm of soil. In summer, place the pots outside. In winter, place them in a heated greenhouse with additional artificial light. Moisten th
29、e 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. Moisten the soil below the geosynthetic barrier or bitumen by placing the pot from time to time in a saucer filled with rain water. 6 Evaluation
30、 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 layer of bitumen. If the roots have not penetrated the bitumen, the test shall be repeated. NOTE This is a con
31、trol of the vitality of the plants. 7 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, stati
32、ng whether the roots have penetrated the geosynthetic barrier and the bitumen, accompanied where possible by a photograph; g) date of testing. CEN/TS 14416:2005 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:25:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 7
33、 Bibliography 1 EN ISO 10318, Geosynthetics Terms and definitions (ISO 10318:2005) CEN/TS 14416:2005 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:25:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD CEN/TS 14416:2005 BSI 389 Chiswick High Road London W4 4AL
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