EN ISO 10722-2007 en Geosynthetics - Index test procedure for the evaluation of mechanical damage under repeated loading - Damage caused by granular material《土工合成织物 重复载荷下机械损伤评定用索引试.pdf

《EN ISO 10722-2007 en Geosynthetics - Index test procedure for the evaluation of mechanical damage under repeated loading - Damage caused by granular material《土工合成织物 重复载荷下机械损伤评定用索引试.pdf》由会员分享，可在线阅读，更多相关《EN ISO 10722-2007 en Geosynthetics - Index test procedure for the evaluation of mechanical damage under repeated loading - Damage caused by granular material《土工合成织物 重复载荷下机械损伤评定用索引试.pdf（12页珍藏版）》请在麦多课文档分享上搜索。

1、BS EN ISO10722:2007ICS 59.080.70NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDGeosynthetics Index test procedurefor the evaluation ofmechanical damageunder repeated loading Damage caused bygranular material (ISO10722:2007)This British Standard was published un

2、der the authority of the Standards Policy and Strategy Committee on 31 July 2009 BSI 2009ISBN 978 0 580 53190 3Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 10722:2007National forewordThis British Standard is the UK implementation of EN ISO 10722: 2007. It supersedes DD ENV IS

3、O 10722-1:1998 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/553, Geotextiles and geomembranes.A list of organizations represented on this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.BSI as a member of CEN, is obliged to publish EN ISO 10

4、722:2007 as a British Standard. However, attention is drawn to the fact that during the development of this European standard, the UK voted against it approval as a European standard.The Technical committee B/553, Geotextiles and geomembranes, has strong reservations about the appropriateness of thi

5、s test procedure for comparing the susceptibility or evaluating the damage of geotextiles and geomembranes to the effect of mechanical damage caused by granular material under repeated loading.The UK committee is of the opinion that this test procedure may be of use as an acceptance test but only wh

6、en the geotextile or geomembrane has been fully assessed for site damage using the full scale BS 800v wCode of practice for strengthened/reinforced soils and other fillsw site damage procedure. In addition, where a high degree of confidence has been established between the relationship of the labora

7、tory test EN ISO 10722:2007 and the BS 8006 site damage procedure, such relationships being limited to a single product type and grade, this test procedure should not be universally appliedThis publication does not purport to include all the necessary provisions of a contract. Users are responsible

8、for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 10722May 2007ICS 59.080.70 Supersedes ENV ISO 10722-1:1998 English VersionGeosynthetics - Index test procedure for the evaluation ofmech

9、anical damage under repeated loading - Damage causedby granular material (ISO 10722:2007)Gosynthtiques - Mode opratoire dessai pour valuerlendommagement mcanique sous charge rpte -Endommagement caus par des matriaux granulaires(ISO 10722:2007)Geokunststoffe - Indexprfverfahren zur Bewertung vonmecha

10、nischen Schden bei wiederholter Belastung -Beschdigung durch krnige Materialien (ISO 10722:2007)This European Standard was approved by CEN on 14 May 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the stat

11、us of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 v

12、ersion in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, De

13、nmark, 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 STANDARDIZATIONCOMIT EUROPEN DE NORMALISATI

14、ONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 10722:2007: EBS EN ISO 10722:2007ISO 10722:2007(E) ISO 2007 All rights reserved iiiConten

15、ts Page Foreword iv 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Principle1 5 Test specimens2 5.1 Sampling.2 5.2 Number and dimensions of test specimens .2 6 Conditioning.2 7 Apparatus .2 8 Procedure .4 8.1 Damage procedure 4 8.2 Measurement of damage.4 9 Calculations5 10 Test report 5 Bibli

16、ography 6 BS EN ISO 10722:2007ISO 10722:2007(E) iv ISO 2007 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through I

17、SO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates

18、closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards.

19、Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this d

20、ocument may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 10722 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 189, Geosynthetics, in collaboration with Technical Committee ISO/TC 221

21、, Geosynthetics, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). This first edition of ISO 10722 cancels and replaces ISO/TR 10722-1:1998. BS EN ISO 10722:2007INTERNATIONAL STANDARD ISO 10722:2007(E) ISO 2007 All rights reserved 1Geosynthetics Index

22、test procedure for the evaluation of mechanical damage under repeated loading Damage caused by granular material 1 Scope This International Standard describes an index test procedure for simulating mechanical damage to geosynthetics, caused by granular material, under repeated loading. The damage is

23、 assessed visually and by the loss of tensile strength. Other reference tests may be used to assess the damage caused by this test. The test method described is an index test procedure, using a standard granular material. 2 Normative references The following referenced documents are indispensable fo

24、r the application of this document. For dated referenced, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendment) applies. ISO 554 Standard atmospheres for conditioning and/or testing Specifications ISO 10319, Geosynthetics Wide

25、-width tensile test EN 933-1, Tests for geometrical properties of aggregates Part 1: Determination of particle size distribution Sieving method ISO 9862, Geosynthetics Sampling and preparation of test specimens 3 Definitions For the purpose of this document, the following terms and definitions apply

26、. 3.1 reference test test used to determine a particular property of the geosynthetic being damaged in this procedure 4 Principle A geosynthetic specimen is placed between two layers of a synthetic aggregate and subjected to a period of dynamic loading. The geosynthetic specimen is then removed from

27、 the test apparatus, examined for any visual damage and then subjected to a mechanical or hydraulic test, to measure the change in mechanical or hydraulic properties. The result is expressed as the change (in percent) of the reference property. The visual damage is also reported. BS EN ISO 10722:200

28、7ISO 10722:2007(E) 2 ISO 2007 All rights reserved5 Test specimens 5.1 Sampling Take specimens from the samples in accordance with ISO 9862. 5.2 Number and dimensions of test specimens For tensile testing, cut five specimens at least 1,0 m long and between 0,5 m and 0,6 m wide from the test sample. T

29、hen cut each specimen lengthwise into two test specimens at least 1,0 m long and between 0,25 m and 0,3 m wide, one to be used in the damage procedure, the other in the reference test. Specimens prepared for this test, which are to be subsequently subjected to a tensile test, shall be dimensioned as

30、 required in ISO 10319. When other reference tests are used, the number and dimensions of specimens shall suit the particular reference test procedure. 6 Conditioning Condition the test specimens and conduct the tests in the standard atmosphere for testing, defined in ISO 554, i.e. at a relative hum

31、idity of (65 5) % and a temperature of (20 2) C, until the change in mass between successive readings made at intervals of not less than two hours does not exceed 0,25 % of the mass of the test specimens. The test shall be performed in the same atmosphere. Conditioning and/or testing at a specified

32、relative humidity may be omitted if it can be shown that the results are not affected by this omission. 7 Apparatus 7.1 Compression machine, which can be controlled to produce a sinusoidal pressure of between (500 10) kPa and (5 0,5) kPa on the loading plate, at a frequency of 1 Hz. 7.2 Test contain

33、er. The test container shall be a rigid metal box of minimum 300 mm by 300 mm internal dimensions in the plane, and shall consist of two parts, each 75 mm deep. The two parts of the box may be bolted or clipped together during the damage procedure. Shims of sufficient thickness to allow the specimen

34、 to be retained without generating any tension shall be fitted between the two parts. The lower part of the box shall be mounted on a rigid base which deflects less than 1 mm when the test load is applied directly to the base, or shall be rigidly fixed to the hydraulic piston of the compression mach

35、ine. Figure 1 shows a typical arrangement of the apparatus. BS EN ISO 10722:2007ISO 10722:2007(E) ISO 2007 All rights reserved 3Dimensions in millimetres Key 1 rigid base support 2 rigid metal box in two parts, 300 mm 300 mm plan dimensions (min) 3 applied load (cyclic loading 5 kPa to 500 kPa at 1

36、Hz) 4 loading plate (100 mm 200 mm) 5 geosynthetic specimen (surplus rolled up carefully outside the container during the test procedure) 6 aggregate (compacted in the lower box, loose in the upper box) 7 shims aSpherical seating. Figure 1 Section through apparatus BS EN ISO 10722:2007ISO 10722:2007

37、(E) 4 ISO 2007 All rights reserved7.3 Loading plate, with dimensions 100 mm by 200 mm, made of steel or aluminium, with adequate stiffness to transmit the loading forces to the aggregate without deflection. 7.4 Aggregate. The aggregate used in the damage procedure is a sintered aluminium oxide1), wi

38、th the following requirement on grain size: when tested in accordance with EN 933-1, 100 % of the aggregate shall pass a 10 mm sieve and 0 % shall pass a 5 mm sieve. If necessary, the aggregate shall be wet sieved on a 5 mm aperture sieve at the first use and after every three uses, and any material

39、 passing the sieve shall be discarded. The aggregate shall be totally discarded after twenty uses. 8 Procedure 8.1 Damage procedure Fill the lower part of the test container with the aggregate. Place the aggregate in two equal layers, each compacted with a flat plate loaded to a pressure of (200 2)

40、kPa, for 60 s, over the whole area of the test container. Strike the top layer off level with the top of the lower part of the container. Place the specimen across the top of the lower part of the container, the centre of the specimen aligned with the centre of the container and with the free edges

41、equally spaced from each side of the container. If necessary, roll up the free ends of the specimen outside the container in such a way that the specimen is not damaged during the test. Position the upper part of the container and bolt or clip it into position making sure the specimen is smooth, fre

42、e from wrinkles but not pre-tensioned. Then, loosely fill the upper part of the container with aggregate to a depth of 75 mm above the specimen. Position the loading plate centrally in the container and apply a load of (5 0,5) kPa. Set the loading apparatus to produce a cyclic loading of between (10

43、 10) kPa minimum and (500 10) kPa maximum, at a frequency of 1 Hz for 200 loading cycles. Determine the pressure using the area of the loading platen, not the area of the test container. Remove the specimen carefully from the test container, ensuring that no additional damage occurs during removal.

44、Repeat the procedure for other specimens from the sample. 8.2 Measurement of damage Measure the damage by subjecting the reference sub-specimen and the damaged sub-specimen to the same reference test. The reference test shall normally be ISO 10319, but other mechanical or hydraulic reference tests m

45、ay be selected, i.e. ISO 12236, ISO 12956 or ISO 11058. 1) A suitable aggregate can be obtained from: Explorer srl, Viale Regina Pacis, 11, I-41049 Sassuolo (MO), Italy; Semanaz et Cie, 107 Quai du Rancy, Port de Bonneuil, F-94388 Bonneuil-sur-Marne, France; Kuhmichel Abrasiv GmbH, Asikos Strahlmitt

46、el GmbH, D-46535 Dinslaken, Germany. This information is given for the convenience of users of this International Standard and does not imply an approval of the provider by CEN or ISO. BS EN ISO 10722:2007ISO 10722:2007(E) ISO 2007 All rights reserved 5The reference sub-specimen is not a virgin prod

47、uct, but it consists of a specimen installed over the aggregate, subsequently subjected to a static pressure of (500 10) kPa for 60 s, and finally taken out to be submitted to the reference test. The reference test to be used shall be agreed between parties prior to the commencement of the test. Opt

48、ionally, the specimen is visually examined for damage and an assessment of the damage is made. The examination includes making a record of the number of holes in the specimen and a qualitative assessment of any damage. 9 Calculations Calculate the change in the reference property as d0100RRR= where

49、Rd is the reference test value of the damaged specimen; R0 is the reference test value of the reference specimen; R is the percentage retained of the reference test value (damage index). Calculate the mean value of R, the standard deviation and the coefficient of variation. 10 Test report The test report shall include the following information: a) the number and date of this International Standard (i.e. ISO 10722); b) identification of the sample, date of receipt and date of testing; c