DIN EN ISO 11058-2010 Geotextiles and geotextile-related products - Determination of water permeability characteristics normal to the plane without load (ISO 11058 2010) German ver.pdf

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1、November 2010 Translation by DIN-Sprachendienst.English price group 13No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I

2、CS 59.080.70!$l(“1730596www.din.deDDIN EN ISO 11058Geotextiles and geotextile-related products Determination of water permeability characteristics normal to the plane,without load (ISO 11058:2010)English translation of DIN EN ISO 11058:2010-11Geotextilien und geotextilverwandte Produkte Bestimmung d

3、er Wasserdurchlssigkeit normal zur Ebene, ohne Auflast(ISO 11058:2010)Englische bersetzung von DIN EN ISO 11058:2010-11Gotextiles et produits apparents Dtermination des caractristiques de permabilit leau normalement au plan, sanscontrainte mcanique (ISO 11058:2010)Traduction anglaise de DIN EN ISO 1

4、1058:2010-11SupersedesDIN EN ISO 11058:2010-08www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.2410.10 DIN EN ISO 11058:2010-11 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical

5、Committee ISO/TC 221 “Geosynthetics” in collaboration with Technical Committee CEN/TC 189 “Geosynthetics” (Secretariat: NBN, Belgium). The responsible German body involved in its preparation was the Normenausschuss Textil und Textil-maschinen (Textiles and Textile Machinery Standards Committee), Wor

6、king Committee NA 106-01-11 AA Geotextilien und Geokunststoffe. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 5813 DIN EN 25813 ISO 9862 DIN EN ISO 9862 ISO 10320 DIN EN ISO 10320 Amendments This standard differs from DIN EN ISO 11058

7、:1999-06 as follows: a) Specifications relating to the velocity index have been modified. b) Clause 5 “Constant head method” has been revised. c) Clauses 6 and 7 have been editorially revised. d) All figures have been amended and replaced. e) Annex B, Tables C.1 and D.2 have been editorially revised

8、. f) The columns in Table D.1 have been rearranged. Compared with DIN EN ISO 11058:2010-08, the following correction has been made to the German version only and therefore does not affect the English text: g) in Subclause 5.2.7, 0,3 % has been replaced by 3 %. Previous editions DIN EN ISO 11058: 199

9、9-06, 2010-08 DIN EN ISO 11058:2010-11 3 National Annex NA (informative) Bibliography DIN EN 25813, Water quality Determination of dissolved oxygen Iodometric method DIN EN ISO 9862, Geosynthetics Sampling and preparation of test specimens DIN EN ISO 10320, Geotextiles and geotextile-related product

10、s Identification on site DIN EN ISO 11058:2010-11 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11058 April 2010 ICS 59.080.70 Supersedes EN ISO 11058:1999English Version Geotextiles and geotextile-related products - Determination of water permeability c

11、haracteristics normal to the plane, without load (ISO 11058:2010) Gotextiles et produits apparents - Dtermination des caractristiques de permabilit leau normalement au plan, sans contrainte mcanique (ISO 11058:2010) Geotextilien und geotextilverwandte Produkte - Bestimmung der Wasserdurchlssigkeit n

12、ormal zur Ebene, 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 alterat

13、ion. 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 transl

14、ation 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

15、, 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 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR N

16、ORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11058:2010: EContents 2 Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Test specim

17、ens5 4.1 Handling5 4.2 Selection .5 4.3 Number and dimensions.5 4.4 Condition of specimens 5 5 Constant head method5 5.1 Principle5 5.2 Apparatus .5 5.3 Procedure .6 5.4 Calculation and expression of results.7 6 Falling head method7 6.1 Principle7 6.2 Apparatus .8 6.3 Procedure .9 6.4 Calculation an

18、d expression of results.9 7 Test report 10 Annex A (informative) Determination of the correction factor, RT, to a water temperature of 20 C 15 Annex B (informative) Relationship between head loss and flow velocity .17 Annex C (informative) Velocity index19 Annex D (informative) Experimental data and

19、 calculations20 DIN EN ISO 11058:2010-11 EN ISO 11058:2010 (E) Foreword This document (EN ISO 11058:2010) has been prepared by Technical Committee ISO/TC 221 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 b

20、y 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 fo

21、r 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/CENEL

22、EC 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

23、, 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. “Geosynthetics” in collaboration with Te

24、chnical Committee CEN/TC 189 “Geosynthetics”, the secretariat of 3 DIN EN ISO 11058:2010-11 EN ISO 11058:2010 (E) 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

25、 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

26、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, Statist

27、ical 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 Identif

28、ication on site 3 Terms and definitions For the purposes of this document the following terms and definitions apply. 3.1 velocity index VH50velocity corresponding to a head loss of 50 mm across a specimen, expressed to the nearest 1 mm/s 4 DIN EN ISO 11058:2010-11 EN ISO 11058:2010 (E) 4 Test specim

29、ens 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

30、 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

31、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 o

32、f 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

33、 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

34、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

35、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

36、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

37、 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. 5 DIN EN ISO 11058:2010-11 EN ISO 11058:2010 (E) 5.2.2 Water supply, of the fo

38、llowing 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 c

39、orrection 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 tan

40、k. 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

41、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 accur

42、acy of 1 % of the capacity of the vessel. When the water flow is determined by volume, use a measuring vessel for determining volume to an accuracy of 1 %. When direct measurement of water flow velocity is made by gauge, the flow velocity shall be measured to an accuracy of 5 %. When determining the

43、 water volume by mass, it shall be determined to an accuracy of 1 %. 5.2.7 Measurement device for determining the applied head, to an accuracy of 3 %. 5.3 Procedure 5.3.1 Place the specimens under water containing a wetting agent at laboratory temperature, gently stir to remove air bubbles and leave

44、 to saturate for at least 12 h. The wetting agent is aryl alkyl sodium sulfonate at 0,1 % volume. 5.3.2 Place a specimen in the apparatus and ensure that all joints are watertight. 5.3.3 Fill the apparatus with water until there is a 50 mm water head difference across the specimen. Shut off the wate

45、r supply and if the water heads do not equalize on each side of the specimen within 5 min, investigate the likelihood of any trapped air within the apparatus and repeat the procedure. If the water heads cannot be equalized within 5 min, this shall be noted in the test report. 5.3.4 Adjust the flow t

46、o attain a head loss of (70 5) mm and record this value to the nearest 1 mm. When the head has been steady for a minimum of 30 s, collect the water passing through the system in the measuring vessel over a fixed period of time and record the volume of water collected to the nearest 10 cm3and the tim

47、e to the nearest 1 s. The volume of water collected should be a minimum of 1 000 cm3and the collection time should be a minimum of 30 s. When the water flow is determined by volume, the volume of the measuring vessel shall not exceed twice the volume of the collected water. If a flow velocity gauge

48、is used, then a maximum velocity giving a head loss of about 70 mm should be set. The real velocity shall be taken as the average of three consecutive readings with a minimum time interval between readings of 15 s. 6 DIN EN ISO 11058:2010-11 EN ISO 11058:2010 (E) 5.3.5 Repeat 5.3.4 for four lower he

49、ad losses of approximately 0,8; 0,6; 0,4 and 0,2 times the maximum head loss, starting with the highest velocity and ending with the lowest. 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. The same principle applies to the velocity when using a flow velocity gauge. 5.3.6 Record the water temperature to the nearest 0,5 C. 5.3.7 Rep