BS-EN-12372-2006.pdf
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1、BRITISH STANDARD BS EN 12372:2006 Natural stone test methods Determination of flexural strength under concentrated load The European Standard EN 12372:2006 has the status of a British Standard ICS 73.020; 91.100.15 ? Licensed Copy: London South Bank University, London South Bank University, Thu Jan
2、18 01:22:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 12372:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2007 BSI 2007 ISBN 978-0-580-49920-3 National foreword This British Standard was published by BSI. It is the UK
3、 implementation of EN 12372:2006. It supersedes BS EN 12372:1999 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee B/545, Natural stone. A list of organizations represented on B/545 can be obtained on request to its secretary. This publication does not
4、purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, L
5、ondon South Bank University, Thu Jan 18 01:22:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12372 December 2006 ICS 73.020; 91.100.15Supersedes EN 12372:1999 English Version Natural stone test methods - Determination of flexural strength under con
6、centrated load Mthodes dessai pour pierres naturelles - Dtermination de la rsistance la flexion sous charge centre Prfverfahren fr Naturstein - Bestimmung der Biegefestigkeit unter Mittellinienlast This European Standard was approved by CEN on 25 October 2006. CEN members are bound to comply with th
7、e 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 bibliographical references concerning such national standards may be obtained on application to the Central Secretariat o
8、r 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 responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official vers
9、ions. 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, Slovenia, Spain, Swed
10、en, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members.
11、 Ref. No. EN 12372:2006: E Licensed Copy: London South Bank University, London South Bank University, Thu Jan 18 01:22:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 12372:2006 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references4 3 Principle4 4 Symbols4 5 Apparatus .4 6 Preparation of t
12、he specimens 5 6.1 Sampling.5 6.2 Test specimens5 6.2.1 Surface finish.5 6.2.2 Dimensions.5 6.2.3 Tolerance5 6.2.4 Planes of anisotropy .5 6.2.5 Conditioning before testing6 7 Test procedure.6 8 Expression of the results6 9 Test report6 Annex A (normative) Statistical evaluation of the test results.
13、12 A.1 Scope 12 A.2 Symbols and definitions .12 A.3 Statistical evaluation of test results 13 Bibliography15 Licensed Copy: London South Bank University, London South Bank University, Thu Jan 18 01:22:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 12372:2006 (E) 3 Foreword This document (EN 12372:
14、2006) 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 June 2007, and conflicting nati
15、onal standards shall be withdrawn at the latest by June 2007. This document supersedes EN 12372:1999. The change of the specimens dimensions requested a revision of this European Standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countr
16、ies are bound to implement this European Standard: 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, Slovenia, Spain, Sweden,
17、Switzerland and United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Thu Jan 18 01:22:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 12372:2006 (E) 4 1 Scope This European Standard specifies a test method for determination of flexural strength under a concentr
18、ated load for natural stone. Both an identification and a technological product testing procedure are included. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated referenc
19、es, the latest edition of the referenced document (including any amendments) applies. EN 12390 (all parts), Testing hardened concrete 3 Principle The principle of this method is to place a specimen on two rollers and to progressively load the specimen in the middle. The breaking load is measured and
20、 the flexural strength calculated. 4 Symbols For the purposes of this document, the following symbols apply. Rtf flexural strength, in Megapascals F breaking load, in newtons a load rate, in Megapascals/second V loading rate, in newtons/second l distance between the supporting rollers, in millimetre
21、s b width of the specimen adjacent 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 A balance capable of weighing the specimen with an accuracy of 0,01 % of the mass o
22、f the specimen. 5.2 A ventilated oven capable of maintaining a temperature of (70 5) C. 5.3 A linear measuring device with an accuracy of 0,05 mm. 5.4 A testing machine of appropriate force, in accordance with the EN 12390 and calibrated according to this European Standard. Licensed Copy: London Sou
23、th Bank University, London South Bank University, Thu Jan 18 01:22:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 12372:2006 (E) 5 5.5 A 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 rolle
24、r) 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. 5.6 A room which can be maintained at a temperature of (20 10) C. 6 Preparation of the specimens 6.1 Sampling Th
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