1、September 2016 English price group 9No 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).ICS 91.100.15!%ZlR“2557347www.din.d
2、eDIN EN 14617-2Agglomerated stone Test methods Part 2: Determination of flexural strength (bending);English version EN 14617-2:2016,English translation of DIN EN 14617-2:2016-09Knstlich hergestellter Stein Prfverfahren Teil 2: Bestimmung der Biegefestigkeit (Schwenkbiegen);Englische Fassung EN 14617
3、-2:2016,Englische bersetzung von DIN EN 14617-2:2016-09Pierre agglomre Mthodes dessai Partie 2: Dtermination de la rsistance la flexion (traction);Version anglaise EN 14617-2:2016,Traduction anglaise de DIN EN 14617-2:2016-09SupersedesDIN EN 14617-2:2008-11www.beuth.deDTranslation by DIN-Sprachendie
4、nst.In case of doubt, the German-language original shall be considered authoritative.Document comprises 13 pages 08.16 2 A comma is used as the decimal marker. National foreword This document (EN 14617-2:2016) has been prepared by Technical Committee CEN/TC 246 “Natural stones”, (Secretariat: UNI, I
5、taly). At present a DIN committee does not exist for this standard since the parties concerned have not shown any interest in work on the subject. Amendments This standard differs from DIN EN 14617-2:2008-11 as follows: a) sampling has been modified; b) the distance between the rollers is no longer
6、specified; c) tolerances are no longer given; d) the rate of loading has been added; e) the test report has been modified. Previous editions DIN EN 14617-2: 2004-05, 2008-11 DIN EN 14617-2:2016-09 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14617-2 June 2016 ICS 91.100.15 Supersedes EN 1461
7、7-2:2008English Version Agglomerated stone - Test methods - Part 2: Determination of flexural strength (bending) Pierre agglomre - Mthodes dessai - Partie 2: Dtermination de la rsistance la flexion (traction) Knstlich hergestellter Stein - Prfverfahren - Teil 2: Bestimmung der Biegefestigkeit (Schwe
8、nkbiegen) This European Standard was approved by CEN on 25 March 2016. 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 alteration. Up-to-date lists and bibliograph
9、ical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibilit
10、y of a CEN member into its own language and notified to the CEN-CENELEC 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, Former Yugoslav Republic of
11、 Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION
12、 EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14617-2:2016 EEN 14617-2:2016 (E) 2 Contents Page European foreword . 3 1 Scope 4
13、 2 Normative references 4 3 Principle . 4 4 Symbols . 4 5 Apparatus . 4 6 Preparation of the specimens . 5 6.1 Sampling . 5 6.2 Test specimens . 5 6.2.1 Surface finish 5 6.2.2 Dimensions of the specimens for type testing and for factory production control 6 6.2.3 Conditioning before testing . 6 7 Te
14、st procedure . 6 8 Expression of the results 6 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 Statistical evaluation of test results . 8 Bibliography . 11 DIN EN 14617-2:2016-09 EN 14617-2:2016 (E) 3 European foreword T
15、his document (EN 14617-2:2016) has been prepared by Technical Committee CEN/TC 246 “Natural stones”, the secretariat 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 Decemb
16、er 2016, and conflicting national standards shall be withdrawn at the latest by December 2016. 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 for identifying any or all such patent
17、 rights. This document supersedes EN 14617-2:2008. Clauses 2, 6.1, 6.2.2, 7 and 9 have been modified and old 6.23 “Tolerance“ has been deleted since the last edition of this European Standard. This European Standard is one of a series of standards for test methods for agglomerated stones which inclu
18、des the following parts: Part 1: Determination of apparent density and water absorption Part 2: Determination of flexural strength (bending) Part 4: Determination of the abrasion resistance Part 5: Determination of freeze and thaw resistance Part 6: Determination of thermal shock resistance Part 8:
19、Determination of resistance to fixing (dowel hole) Part 9: Determination of impact resistance Part 10: Determination of chemical resistance Part 11: Determination of linear thermal expansion coefficient Part 12: Determination of dimensional stability Part 13: Determination of electrical resistivity
20、Part 15: Determination of compressive strength 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
21、Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia
22、, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 14617-2:2016-09EN 14617-2:2016 (E) 4 1 Scope This European Standard specifies a method for the determination of flexural strength under a concentrated load (breaking resistance) of agglomerated stone flat products. 2 Normative refer
23、ences The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. E
24、N 12372, Natural stone test methods Determination of flexural strength under concentrated load 3 Principle The principle of this method is to place a specimen on two rollers and progressively load the specimen in the middle. The breaking load is measured and the flexural strength calculated. 4 Symbo
25、ls For the purposes of this document, the following symbols apply. Rtfflexural strength, (MPa) F breaking load, (Newtons) l distance between the supporting rollers, in millimetres b width of the specimen adjacent to the plane of fracture, in millimetres h thickness of the specimen adjacent to the pl
26、ane 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 Ventilated oven capable of maintaining (40 5) C. 5.3 Linear measuring device with an accuracy of 0,0
27、5 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 lower rollers (supporting rollers) and one upper roller (load-applying roller) which shall b
28、e 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 7. DIN EN 14617-2:2016-09EN 14617-2:2016 (E) 5 Key 1 loading roller 2 supporting roller 3 supporting roller Figure 1 Arrangement of loa
29、ding of test specimen (centre-point loading) 5.6 Room which can be maintained at (20 5) C. 6 Preparation of the specimens 6.1 Sampling The sampling is not the responsibility of the test laboratory except when specially requested. At least ten specimens shall be selected from a homogeneous batch (see
30、 also 6.2.3). 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 etc.) as required for application, this may b
31、e 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 case the kind of surface finish shall be stat
32、ed in the report. DIN EN 14617-2:2016-09 EN 14617-2:2016 (E) 6 6.2.2 Dimensions of the specimens for type testing and for factory production control For type testing and for factory production control: the thickness h shall be the one forecast for the final product; the total length L shall be at le
33、ast (200 0,3) mm; 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 Conditioning before 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 spec
34、imens 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) 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 eq
35、uilibrium is reached. After that the test shall be performed within 24 h. 7 Test procedure Wipe the surface of the rollers clean and remove 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 dimens
36、ions are expressed in millimetres to the nearest 0,1 mm. The specimen is placed centrally on the supporting rollers (see Figure 1). The loading roller is placed in the middle of the specimen. The load is increased uniformly at a rate of (0,25 0,05) MPa/s until the specimen breaks. Note the breaking
37、load at least to the nearest 10 N and also the place where the fracture occurs. Where the loading rate (V) is needed in N/s the following formula can be used to determine the required rate in N/s: ( )sNlhbaV 322= (1) where a is the rate, in MPa/s; h is the thickness forecast for the final product; L
38、 is the total length, at least (200 0,3) mm; l is the distance between the supporting rollers, which is always (20 1) mm shorter than the total length L; b is the width, at least (50 0,3) mm and in no case it is less than the thickness. 8 Expression of the results The flexural strength Rtfof each sp
39、ecimen is calculated using the formula: 232tfFIRbh= (2) DIN EN 14617-2:2016-09 EN 14617-2:2016 (E) 7 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 f
40、laws are present (veins, fissures, etc.) the test shall be repeated. 9 Test report The test report shall contain the following information: a) unique identification number of the report; b) number, title and date of issue of this European Standard; c) name and address of the test laboratory and the
41、address where the test was carried out if different from the test laboratory; d) commercial name of the product; e) 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 the date of
42、 testing; h) number of specimens in the sample; i) dimensions of the specimens; j) the result expressed as the mean value tfR of the flexural strength and the standard deviations, in Megapascal to the nearest 0,1 MPa; k) all deviations from the standard and their justification; l) remarks. The test
43、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 consent of the test laboratory. DIN EN 14617-2:2016-09 EN 14617-2:2016 (E) 8 Annex A
44、(normative) Statistical evaluation of tests results A.1 Scope This annex establishes a method for the statistical treatment of test results obtained following the agglomerated stone test method described in this standard. A.2 Symbols and definitions Measured values x1, x2, xi, xnNumber of measured v
45、alues n Mean value 1iixxn=Standard deviation 1)null(=nxxsiCoefficient of variation svx= (for individual values) Logarithmic Mean =iixnx ln1lnLogarithmic Standard deviation lnln(ln )null1ixxsn=Maximum value Max Minimum value Min Lower expected value ln lnsx ksEe=where ks(quantile factor) is given in
46、Table A.1. Quantile factor kssee Table A.1 A.3 Statistical evaluation of test results From the calculation of the mean value ( )x , the standard deviation (s) and the coefficient of variation (v) a normal distribution is assumed. For the calculation of the lower expected value (E) a logarithmic norm
47、al distribution is assumed. The lower expected value (E) corresponds to the 5 % quantile of a logarithmic normal distribution for a confidence level of 75 %. DIN EN 14617-2:2016-09 EN 14617-2:2016 (E) 9 Table A.1 Quantile factor (ks) in dependence on the number of measured values (n) in corresponden
48、ce to the 5 % quantile for a confidence level of 75 % n ks3 3,15 4 2,68 5 2,46 6 2,34 7 2,25 8 2,19 9 2,14 10 2,10 15 1,99 20 1,93 30 1,87 40 1,83 50 1,81 8 1,64 The following examples should help to clarify the method: EXAMPLE 1 Calculation of mean value, standard deviation, maximum value and minim
49、um value of 6 measured values Measurement no. Measured value x 1 2 000 2 2 150 3 2 200 4 2 300 5 2 350 6 2 400 Mean value 2 233 Standard deviation 147 Maximum value 2 400 Minimum value 2 000 EXAMPLE 2 Calculation of mean value, standard deviation, coefficient of variation and lower expected value of 10 measured values DIN EN 14617-2:2016-09 EN 14617-2:2016 (E) 10 Measurement no. Measured value
