1、Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/11/2008 01:02, Uncontrolled Copy, (c) BSIg49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58s
2、trength (bending)ICS 91.100.15Agglomerated stone Test methods Part 2: Determination of flexural BRITISH STANDARDBS EN 14617-2:2008BS EN 14617-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/11/2008 01:02, Uncontrolled Copy, (c) BSIThis British Standard was published under the authori
3、ty of the Standards Policy and Strategy Committee on 29 August 2008 BSI 2008ISBN 978 0 580 59953 8Amendments/corrigenda issued since publicationDate Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Na
4、tional forewordThis British Standard is the UK implementation of EN 14617-2:2008. It supersedes BS EN 14617-2:2004 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/545, Natural stone.A list of organizations represented on this committee can be obtaine
5、d on request to its secretary.This publication does not purport to include all the necessary provisions of a EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14617-2June 2008ICS 91.100.15 Supersedes EN 14617-2:2004 English VersionAgglomerated stone - Test methods - Part 2: Determination offlexural
6、strength (bending)Pierre agglomre - Mthodes dessai - Partie 2 :Dtermination de la rsistance la flexion (traction)Knstlich hergestellter Stein - Prfverfahren - Teil 2:Bestimmung der Biegefestigkeit (Schwenkbiegen)This European Standard was approved by CEN on 26 April 2008.CEN members are bound to com
7、ply 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 CEN Manageme
8、nt 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theoff
9、icial versions.CEN members are the national standards 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, Slov
10、enia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN nati
11、onal Members.Ref. No. EN 14617-2:2008: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/11/2008 01:02, Uncontrolled Copy, (c) BSIEN 14617-2:2008 (E) 2 Contents Foreword3 1 Scope 4 2 Normative references 4 3 Principle4 4 Symbols 4 5 Apparatus .4 6 Preparation of the specimens 5 6.1 Sampling
12、.5 6.2 Test specimens5 6.2.1 Surface finish .5 6.2.2 Dimensions.6 6.2.3 Tolerance 6 6.2.4 Conditioning before testing6 7 Test procedure.6 8 Expression of the results6 9 Test report 7 Annex A (normative) Statistical evaluation of tests results .8 A.1 Scope 8 A.2 Symbols and definitions .8 A.3 Statist
13、ical evaluation of test results 9 BS EN 14617-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/11/2008 01:02, Uncontrolled Copy, (c) BSIEN 14617-2:2008 (E) 3 Foreword This document (EN 14617-2:2008) has been prepared by Technical Committee CEN/TC 246 “Natural stones”, the secretariat
14、of which is held by UNI. 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 2008, and conflicting national standards shall be withdrawn at the latest by December 2008. Attention is drawn to
15、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 for identifying any or all such patent rights. This document supersedes EN 14617-2:2004. Test methods for agglomerated stones consist of the following: EN
16、14617-1, Agglomerated stone - Test methods Part 1: Determination of apparent density and water absorption EN 14617-2, Agglomerated stone Test methods Part 2: Determination of flexural strength (bending) EN 14617-4, Agglomerated stone - Test methods Part 4: Determination of the abrasion resistance EN
17、 14617-5, Agglomerated stone - Test methods Part 5: Determination of freeze and thaw resistance EN 14617-6, Agglomerated stone - Test methods Part 6: Determination of thermal shock resistance prEN 14617-8, Agglomerated stone Test methods Part 8: Determination of resistance to fixing (dowel hole) EN
18、14617-9, Agglomerated stone - Test methods Part 9: Determination of impact resistance EN 14617-10, Agglomerated stone Test methods Part 10: Determination of chemical resistance EN 14617-11, Agglomerated stone Test methods Part 11: Determination of linear thermal expansion coefficient EN 14617-12, Ag
19、glomerated stone Test methods Part 12: Determination of dimensional stability EN 14617-13, Agglomerated stone Test methods Part 13: Determination of electrical resistivity EN 14617-15, Agglomerated stone Test methods Part 15: Determination of compressive strength EN 14617-16, Agglomerated stone Test
20、 methods Part 16: Determination of dimensions, geometric characteristics and surface quality of modular tiles According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
21、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 the United Kingdom. BS EN 14617-2:2008Licensed Copy:
22、Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/11/2008 01:02, Uncontrolled Copy, (c) BSIEN 14617-2:2008 (E) 4 1 Scope This European standard specifies a method for determination of flexural strength under a concentrated load (bending resistance) of agglomerated stone flat products. 2 Normative reference
23、s 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. EN 12372, Natural stone test methods - Determin
24、ation of flexural strength under concentrated load EN 14618, Agglomerated stone Terminology and classification EN 14617-16, Agglomerated stone - Test methods - Determination of dimensions, geometric characteristics and surface quality of modular tiles 3 Principle The principle of this method is to p
25、lace a specimen on two rollers and progressively load the specimen in the middle. The breaking load is measured and the flexural strength calculated. 4 Symbols Rtfflexural strength, (MPa) F breaking load, (Newtons) l distance between the supporting rollers, in millimetres b width of the specimen adj
26、acent to the plane of fracture, in millimetres h thickness of the specimen adjacent to the plane of fracture, in millimetres L total length of the specimen, in millimetres 5 Apparatus 5.1 Balance capable of weighing the specimen with a precision within 0,01 % of the mass of the specimen. 5.2 Ventila
27、ted oven capable of maintaining (40 5)C. 5.3 Linear measuring device with an accuracy of 0,05 mm. 5.4 Testing machine of appropriate force, in accordance with EN 12372 and calibrated according to this standard. 5.5 Device for applying loads on the specimen by a centre-point load. It consists of two
28、lower rollers (supporting rollers) and one upper roller (load-applying roller) which shall be centred exactly in the middle between the two supporting rollers (see Figure 1). The distance between the two supporting rollers shall be reported as requested in 6.2.2. BS EN 14617-2:2008Licensed Copy: Wan
29、g Bin, ISO/EXCHANGE CHINA STANDARDS, 21/11/2008 01:02, Uncontrolled Copy, (c) BSIEN 14617-2:2008 (E) 5 Key 1 loading roller 2 supporting roller 3 supporting roller Figure 1 Arrangement of loading of test specimen (centre-point loading) 5.6 Room which can be maintained at (20 5) C. 6 Preparation of t
30、he specimens 6.1 Sampling The sampling is not the responsibility of the test laboratory except when specially requested. When possible, whole agglomerated stones should be tested, however, very large or irregular shapes may be cut in order to arrange them on the instrument. At least six specimens sh
31、all be selected from a homogeneous batch (see also 6.2.4). 6.2 Test specimens 6.2.1 Surface finish As a standard reference, the surface finish of the faces of the specimens shall be sawn, honed or polished. In case of necessity to test specimens with other surface finishes (e.g. flamed, sandblasted
32、etc.) as required for application, this may be done. The surface intended for use shall be in contact with the two supporting rollers (facing downwards), when the backside face is not perfectly planar. In all other cases the surface intended for use shall be in contact with the upper roller. In any
33、case the kind of surface finish shall be stated in the report. BS EN 14617-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/11/2008 01:02, Uncontrolled Copy, (c) BSIEN 14617-2:2008 (E) 6 6.2.2 Dimensions The thickness h shall be the one forecast for the final product. The total length
34、 L shall be at least (200 0,3) mm. The distance between the supporting rollers l shall always be 20 mm. shorter than the total length L. The width b shall be at least (50 0,3) mm and in no case it shall be less than the thickness. 6.2.3 Tolerance The tolerance on the distance between the supporting
35、rollers l is to be 1 mm of the nominal dimension. The faces shall not depart from perpendicularity to the axis of the specimen by more than 2 % with a maximum of 2 mm differences when measuring in any direction. The measurement shall be taken in accordance with EN 14617-16. 6.2.4 Conditioning before
36、 testing The specimens shall be conditioned at room temperature (20 5) C for (24 2) h. For agglomerated stones with cement or cement and polymer as binder the specimens shall be dried at (40 5) C to a constant mass. Constant mass is reached when the difference between two weighings carried out (24 2
37、) h apart is no greater than 0,1 % of the first of the two masses. After drying and prior to testing the specimens shall be stored at (20 5) C until the thermal equilibrium is reached. After that the test shall be performed within 24 h. 7 Test procedure Wipe the surface of the rollers clean and remo
38、ve any loose grits from the faces of the specimen that will be in contact with the rollers. The width and the thickness of the specimen are measured and the dimensions are expressed in millimetres to the nearest 0,1 mm. The specimen is placed centrally on the supporting rollers (see Figure 1). The l
39、oading roller is placed in the middle of the specimen. The load is increased uniformly at a rate of (0,25 0,05) MPa/suntil the specimen breaks. Note the breaking load at least to the nearest 10 N and also the place where the fracture occurs. 8 Expression of the results The flexural strength Rtfof ea
40、ch specimen is calculated using the formula: 2tf23bhFlR = (1) The result shall be expressed in Megapascals to the nearest 0,1 MPa. If the fracture is situated more than 15 % of the distance between the supporting rollers from the middle of the specimen and/or flaws are present (veins, fissures, etc.
41、) the test shall be repeated. BS EN 14617-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/11/2008 01:02, Uncontrolled Copy, (c) BSIEN 14617-2:2008 (E) 7 9 Test report The test report shall contain the following information: a) unique identification number of the report; b) number, ti
42、tle and date of issue of this European standard; c) name and address of the test laboratory and the address where the test was carried out if different from the test laboratory; d) name and address of the client; e) it is the responsibility of the client to supply the following information: commerci
43、al name of the stone aggregates used in the tested agglomerated stone lots in accordance with EN 14618: name of the supplier; surface finish of the specimens (if relevant to the test); f) date of delivery of the sample or of the specimens; g) date when the specimens were prepared (if relevant) and t
44、he date of testing; h) number of specimens in the sample; i) dimensions of the specimens; j) rate of loading;k) for each specimen: the width and thickness adjacent to the fracture plane and the distance between the supporting rollers in millimetres to the nearest 0,1 mm, the breaking force in Newton
45、s without any decimal place, the flexural strength in Megapascal to the nearest 0,1 MPa and the location of the fracture and any anomalies observed; l) for each relevant direction of loading the mean value tfR of the flexural strength and the standard deviations, in Megapascal to the nearest 0,1 MPa
46、; m) all deviations from the standard and their justification; n) remarks. The test report shall contain the signature(s) and the role(s) of the responsible(s) for the testing and the date of issue of the report. It shall also state that the report shall not be partially reproduced without written c
47、onsent of the test laboratory. BS EN 14617-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/11/2008 01:02, Uncontrolled Copy, (c) BSIEN 14617-2:2008 (E) 8 Annex A (normative) Statistical evaluation of tests results A.1 Scope This annex establishes a method for the statistical treatmen
48、t of test results obtained following the agglomerated stone test method described in this standard. A.2 Symbols and definitions Measured values x1, x2, xi, xn Number of measured values n Mean value =iixnx1Standard deviation 1)(=nxxsiCoefficient of variation v = sx(for individual values) Logarithmic
49、Mean =iixnx ln1lnLogarithmic Standard deviation 1)(lnlnln=nxxsiMaximum value Max Minimum value Min Lower expected valuelnlnxEsske= where ks(quantile factor) is given in Table A.1 Quantile factor kssee Table A.1 BS EN 14617-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/11/2008 01:02, Uncontrolled Copy, (c) BSIEN 14617-2:2008 (E) 9 A.3 Statistical evaluation of test results From the calculation of the mean value ( )x , the standard deviat
