1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58crushing strengthThe European Standard EN ISO 8895:2006 has the status of a British StandardICS 81.
2、080Shaped insulating refractory products Determination of cold BRITISH STANDARDBS EN ISO 8895:2006BS EN ISO 8895:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2006 BSI 2006ISBN 0 580 48949 3Cross-referencesThe British Standards
3、which implement international 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 publi
4、cation does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover,
5、 the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii and iii, a blank page, pages 1 to 4, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date C
6、ommentsA list of organizations represented on this committee can be obtained on request to its secretary. present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and Europe
7、an developments and promulgate them in the UK.National forewordThis British Standard is the official English language version of EN ISO 8895:2006. It is identical with ISO 8895:2004. It supersedes BS EN 1094-5:1995 which is withdrawn.The UK participation in its preparation was entrusted to Technical
8、 Committee RPI/1, Refractories, which has the responsibility to: aid enquirers to understand the text;EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8895June 2006ICS 81.080 Supersedes EN 1094-5:1995 English VersionShaped insulating refractory products - Determination of coldcrushing strength
9、(ISO 8895:2004)Produits rfractaires isolants faonns - Dtermination dela rsistance lcrasement temprature ambiante (ISO8895:2004)Geformte feuerfeste Erzeugnisse fr Wrmedmmzwecke -Bestimmung der Kaltdruckfestigkeit (ISO 8895:2004)This European Standard was approved by CEN on 29 May 2006.CEN members are
10、 bound to comply with the CEN/CENELEC Internal Regulations which 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
11、 Central Secretariat or to any CEN member.This European Standard 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 Central Secretariat has the same status
12、as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slove
13、nia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN natio
14、nal Members.Ref. No. EN ISO 8895:2006: EForeword The text of ISO 8895:2004 has been prepared by Technical Committee ISO/TC 33 “Refractories” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 8895:2006 by Technical Committee CEN/TC 187 “Refractory products
15、and materials“, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2006, and conflicting national standards shall be withdrawn at the latest by Decem
16、ber 2006. This document supersedes EN 1094-5:1995. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, G
17、reece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 8895:2004 has been approved by CEN as EN ISO 8895:2006 without any modi
18、fications. EN ISO 8895:2006INTERNATIONALSTANDARDISO8895Second edition2004-09-01Reference numberISO 8895:2004(E)Shaped insulating refractory products Determination of cold crushing strengthProduits rfractaires isolants faonns Dtermination de la rsistance lcrasement temprature ambianteEN ISO 8895:2006
19、iiiiiForewordISO (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 ISOtechnical committees. Each member body interested in a subject for which a
20、 technical committee has beenestablished has the right to be represented on that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters
21、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. Draft International Standardsadopted by the technical committees are circulated to
22、 the member bodies for voting. Publication as anInternational 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 document may be the subject of patentrights. ISO shall not be held responsible for ide
23、ntifying any or all such patent rights.ISO 8895 was prepared by Technical Committee ISO/TC 33, Refractories.This second edition cancels and replaces the first edition (ISO 8895:1986), which has been technically revised.EN ISO 8895:2006blank1Shaped insulating refractory products Determination of cold
24、 crushing strength1ScopeThis International Standard specifies a method for determining the cold crushing strength of shaped insulatingrefractory products.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edi
25、tion cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies.ISO 5022, Shaped refractory products Sampling and acceptance testing3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1 cold
26、 crushing strengthmaximum load (applied under specified conditions at room temperature) divided by the area over which the loadis applied, which a refractory can withstand before failure occurs3.2 shaped insulating productshaped refractory having a true porosity of not less than by volume4 Principle
27、At ambient temperature, a test piece of specified dimensions is subjected, in a compression test machine, to anincreasing load until either the test piece collapses or its height is reduced to of its original value. Duringtesting, the load is increased at a specified rate. The cold crushing strength
28、 is calculated from the maximumforce recorded and the dimensions of the test piece.5 Apparatus5.1 Mechanical or hydraulic crushing strength machine, that will enable the load to be increasedprogressively and smoothly, and with a system of measurement that will enable the force exerted on the testpie
29、ce to be known to within . The range of the machine shall be such that the maximum force exerted inthe test is greater than of the maximum force of which the machine is capable. One of the platens of themachine shall be mounted on a spherical seating that will compensate for any small error of paral
30、lelismbetween the load-bearing faces of the test pieces. The platens of the machine shall be ground and the lowerone shall be marked so as to facilitate placing the test piece at its centre.5.2 Micrometer, or other suitable instrument, to measure the deformation of the test piece during the test.45
31、%90 %2%10 %EN ISO 8895:200625.3 Measuring equipment, accurate to , to measure the size of each test piece and to verify itsgeometrical form.5.4 Drying oven, capable of being controlled at .5.5 Steel rule.5.6 feeler gauge.6 Test pieces6.1 The number of items (e.g., bricks or blocks) to be tested shal
32、l be determined in accordance with ISO 5022or with an alternative sampling plan agreed between the parties concerned.6.2 One test piece shall be taken from each brick of standard size.NOTE The number to be taken from larger items is a matter for agreement between the parties concerned. To facilitate
33、further statistical evaluation, the same number of test pieces should be taken from each item.6.3 Each test piece shall be nominally the size of half a standard brick, i.e.: or.6.4 In the case of special shapes, the test pieces shall be dry cut to one of the sizes specified in 6.3.NOTE If possible,
34、the test report should indicate the relationship of the direction of loading to the direction of pressing orextrusion during manufacture.6.5 The load-bearing faces of each test piece shall be flat within a tolerance of . This condition shall bechecked across both diagonals of each load-bearing face
35、with a steel rule (5.5) and a feeler gauge(5.6).6.6 The load-bearing faces of each test piece shall be parallel within a tolerance of . This condition shallbe checked by making four measurements of the height of the test piece, one at the centre of each of its foursides; the measurements shall not d
36、iffer among themselves by more than .6.7 The perpendicularity of each of the four sides of the test piece, with respect to the base, shall be within atolerance of . This condition shall be checked by placing the test piece on a flat, smooth surface andpresenting a set square to the centre of a horiz
37、ontal edge of the side; any gap between the set square and theside of the test piece shall not exceed .7 Procedure7.1 Measure the length and breadth of each load-bearing face of the test piece, and its height at the mid-pointof each of its four sides, in each case to the nearest .7.2 Dry the test pi
38、ece to constant mass in the drying oven (5.4), controlled at , cooling it eachtime in a dry atmosphere.7.3 Place the test piece on one of its larger faces ( ) in the centre of the lower platen of thetesting machine (5.1). No packing material shall be used between the test piece and the platens. Moun
39、t themeasuring instrument (5.2) on the lower platen to measure the deformation occurring in the test piece.7.4 Gradually and continuously increase the load at such a rate that0,1 mm110C 5C0,5 mm114 mm 114 mm 76 mm114 mm 114 mm 64 mm0,5 mm0,5 mm1mm1mm1mm1mm0,5 mm110C 5C114 mm 114 mmEN ISO 8895:20063a
40、) if the expected cold crushing strength is less than , the rate of increase of stress in the test piece isorb) if the expected cold crushing strength is equal to or greater than 10 MPa, the rate of increase of stress in thetest piece is .7.5 Continue increasing the load at the rate given in 7.4 unt
41、il either the test piece collapses (fails to supportthe load) or its height is reduced to of its original height. Record the maximum load indicated duringthe test.8 Expression of resultsCalculate the cold crushing strength, , in megapascals, using the equation:whereis the maximum load, in newtons, i
42、ndicated during the test;is the mean of the four measurements of the length, in millimetres, of the test piece;is the mean of the four measurements of the breadth, in millimetres, of the test piece.Report the cold crushing strength to the nearest .9 Test reportThe test report shall include the follo
43、wing information:a) all information necessary for identification of the sample tested including the designation of the materialtested (manufacturer, type, batch number);b) reference to this International Standard, i.e., ISO 8895;c) the sampling procedure, including:1) the number of items tested (see
44、 6.1);2) the number of test pieces cut from each item, if more than one (see 6.2);3) the dimensions of the test pieces (see 6.3); their positions in the brick (see 6.2) and the presence andlocation of any fired surface;4) where possible, the relationship between the direction of loading and the dire
45、ction of pressing orextrusion during manufacture (see Note to 6.4);d) the results of the test, including:1) the rate of stress increase (see 7.4);2) whether the test was terminated by the collapse of the test piece or by the height being reduced to of the original (see 7.5);3) the individual values
46、of the cold crushing strength for each test piece, calculated as specified inClause 8 and, if appropriate (see 6.2), the mean value for each item tested;e) the name of the testing establishment;f) any information which might help in the interpretation of the test;g) any deviations from the procedure
47、 specified;10 MPa0,05 MPa/s 0,005 MPa/s0,2 MPa/s 0,02 MPa/s90 % 1%SS =FmaxlbFmaxlb0,1 MPa90 %EN ISO 8895:20064h) any unusual features (anomalies) observed during the test;i) the date of the test.EN ISO 8895:2006blankBS EN ISO BSI389 Chiswick High RoadLondonW4 4AL8895:2006BSI British Standards Instit
48、utionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards should
49、 make sure that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual updating service called
