1、August 2007DEUTSCHE NORM English price group 8No part of this standard 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).ICS 59.080.70!$Hu=“1378226ww
2、w.din.deDDIN EN ISO 10722Geosynthetics Index test procedure for the evaluation of mechanical damage underrepeated loading Damage caused by granular material (ISO 10722:2007)English version of DIN EN ISO 10722:2007-08Geokunststoffe Indexprfverfahren zur Bewertung von mechanischen Schden bei wiederhol
3、terBelastung Beschdigung durch krnige Materialien (ISO 10722:2007)Englische Fassung DIN EN ISO 10722:2007-08SupersedesDIN V ENV ISO10722-1:1998-05www.beuth.deDocument comprises 13 pages 10.07DIN EN ISO 10722:2007-08 2 National foreword This standard has been prepared by Technical Committee CEN/TC 18
4、9 “Geosynthetics” (Secretariat: IBN, Belgium) in collaboration with Technical Committee ISO/TC 221 “Geosynthetics” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Textil und Textil-maschinen (Textiles and Textile Machinery Standards
5、 Committee), Technical Committee NA 106-01-11 AA Geotextilien und Geokunststoffe. The DIN Standards corresponding to the International Standards referred to in the EN are as follows: ISO 554 DIN 50014 ISO 9862 DIN EN ISO 9862 ISO 10319 DIN EN ISO 10319 ISO 11058 DIN EN ISO 11058 ISO 12236 DIN EN ISO
6、 12236 ISO 12956 DIN EN ISO 12956 Amendments This standard differs from DIN V ENV ISO 10722-1:1998-05 as follows: a) The prestandard status has been changed to that of a standard. b) The standard has been editorially revised. c) References have been modified. d) The term “damage index” (in German “B
7、eschdigungsindex”) has been dropped. e) The figures have been revised. Previous editions DIN V ENV ISO 10722-1: 1998-05 National Annex NA (informative) Bibliography DIN 50014, Climates and their technical application Standard atmospheres DIN EN ISO 9862, Geosynthetics Sampling and preparation of tes
8、t specimens DIN EN ISO 10319, Geotextiles Wide-width tensile test DIN EN ISO 10722:2007-08 3 DIN EN ISO 11058, Geotextiles and geotextile-related products Determination of water permeability characteristics normal to the plane, without load DIN EN ISO 12236, Geosynthetics Static puncture test (CBR t
9、est) DIN EN ISO 12956, Geotextiles and geotextile-related products Determination of the characteristic opening size DIN EN ISO 10722:2007-08 4 This page is intentionally blank EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 10722May 2007ICS 59.080.70 Supersedes ENV ISO 10722-1:1998 English Ver
10、sionGeosynthetics - Index test procedure for the evaluation ofmechanical 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 10
11、722:2007)Geokunststoffe - Indexprfverfahren zur Bewertung vonmechanischen 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
12、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 CEN Management Centre or to any CEN member.This European Standar
13、d 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 CEN Management Centre has the same status as theofficial versions.CEN members are the national standard
14、s bodies of Austria, Belgium, Bulgaria, 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.
15、EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES 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: EContents P
16、age 1 2 3 4 5 5.1 5.2 6 7 8 8.1 8.2 9 10 2 EN ISO 10722:2007 (E) 44445555577 7889Foreword 3Scope Normative references Definitions Principle Test specimens Sampling. Number and dimensions of test specimens . Conditioning. Apparatus . Procedure . Damage procedure Measurement of damage. Calculations Te
17、st report Bibliography Foreword This document (EN ISO 10722:2007) has been prepared by Technical Committee CEN/TC 189 “Geosyn-thetics”, the secretariat of which is held by NBN, in collaboration with Technical Committee ISO/TC 221 “Geo-synthetics”. This European Standard shall be given the status of
18、a national standard, either by publication of an identical text or by endorsement, at the latest by November 2007, and conflicting national standards shall be withdrawn at the latest by November 2007. This document supersedes ENV ISO 10722-1:1998. According to the CEN/CENELEC Internal Regulations, t
19、he national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, N
20、orway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. 3 EN ISO 10722:2007 (E) 1 Scope This International Standard describes an index test procedure for simulating mechanical damage to geosynthetics, caused by granular material, under repeated loading. T
21、he damage is 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 indi
22、spensable for 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, Geosyn
23、thetics Wide-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 defin
24、itions apply. 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
25、removed from 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. 4 EN IS
26、O 10722:2007 (E) 5 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. Then cut each specimen lengthwise
27、 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 required in ISO 10319. When oth
28、er 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 humidity of (65 5) % and a temperat
29、ure 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 relative humidity may be omitted
30、 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 container. The test container shall be
31、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 to be retained without generati
32、ng 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 machine. Figure 1 shows a typical ar
33、rangement of the apparatus. 5 EN ISO 10722:2007 (E) Dimensions 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 Hz) 4 loading plate (100 mm 200 mm) 5 geosynthetic specimen (surplus rolled
34、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 6 EN ISO 10722:2007 (E) 7.3 Loading plate, with dimensions 100 mm by 200 mm, made of steel or aluminium, with
35、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), with the following requirement on grain size: when tested in accordance with EN 933-1, 100 % of the aggregate shall pass a
36、 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 passing the sieve shall be discarded. The aggregate shall be totally discarded after twenty uses. 8 Procedure 8.1 Damag
37、e 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) 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
38、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 equally spaced from each side of the container. If necessary, roll up the free ends of the specimen outside the containe
39、r 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, free from wrinkles but not pre-tensioned. Then, loosely fill the upper part of the container with aggregate to a depth of 7
40、5 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 10) kPa minimum and (500 10) kPa maximum, at a frequency of 1 Hz for 200 loading cycles. Determine the pressure using t
41、he 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. Repeat the procedure for other specimens from the sample. 8.2 Measurement of damage Measure the damage by subjecting the
42、 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 may be selected, i.e. ISO 12236, ISO 12956 or ISO 11058. 1) A suitable aggregate can be obtained from: Explorer srl, Vial
43、e 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 Strahlmittel GmbH, D-46535 Dinslaken, Germany. This information is given for the convenience of users of this International Standa
44、rd and does not imply an approval of the provider by CEN or ISO. 7 EN ISO 10722:2007 (E) The reference sub-specimen is not a virgin product, 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 s
45、ubmitted to the reference test. The reference test to be used shall be agreed between parties prior to the commencement of the test. Optionally, 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 th
46、e specimen and a qualitative assessment of any damage. 9 Calculations Calculate the change in the reference property as d0100RRR= where 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
47、 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 rece
48、ipt and date of testing; c) the conditioning atmosphere; d) the temperature at which the test was carried out; e) the orientation of the sample and specimens cut from the material roll or sheet; f) the visual damage report; g) the test method used to measure the reference value; h) the mean value of
49、 the percentage retained in the reference value; i) the standard deviation and coefficient of variation of the percentage retained of the reference value; j) the aggregate used in the test; k) any deviation from this procedure. 8 EN ISO 10722:2007 (E) Bibliography 1 ISO 11058, Geotextiles and geotextile-related products Determination of water permeability characteristics normal to the plane, without load 2 ISO 12236, Geosynthetics Static puncture test (CBR test) 3 ISO 12956,
