EN 14651-2005 en Test method for metallic fibre concrete - Measuring the flexural tensile strength (limit of proportionality (LOP) residual) (Incorporates Amendment A1 2007)《金属纤维混凝.pdf
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1、BRITISH STANDARDBS EN 14651:2005 +A1:2007Test method for metallic fibre concrete Measuring the flexural tensile strength (limit of proportionality (LOP), residual)ICS 91.100.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g
2、3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14651:2005+A1:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 11 July 2005 BSI 2008ISBN 978 0 580 61052 3National forewordThis British Standard is the UK im
3、plementation of EN 14651:2005+A1:2007. It supersedes BS EN 14651:2005 which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amend
4、ment A1 is indicated by !“.The UK participation in its preparation was entrusted to Technical Committee B/524, Precast concrete products.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary pr
5、ovisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate Comments31 March 2008 Implementation of CEN amendment A1:2007EUROPEAN STANDARD NORME EUROPENN
6、E EUROPISCHE NORM EN 14651:2005+A1 September 2007 ICS 91.100.30 Supersedes EN 14651:2005 English Version Test method for metallic fibre concrete - Measuring the flexural tensile strength (limit of proportionality (LOP), residual) Mthode dessai du bton de fibres mtalliques - Mesurage de la rsistance
7、la traction par flexion (limite de proportionnalit (LOP), rsistance rsiduelle) Prfverfahren fr Beton mit metallischen Fasern - Bestimmung der Biegezugfestigkeit (Proportionalittsgrenze, residuelle Biegezugfestigkeit) This European Standard was approved by CEN on 3 April 2005 and includes Amendment 1
8、 approved by CEN on 16 August 2007. 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 bibliographical references concerning such nat
9、ional standards may be obtained on application to the CEN 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 responsibility of a CEN member into its own language and
10、 notified to the CEN Management Centre has the same status as the official 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, Luxembour
11、g, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, 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 2007 CEN All rights
12、 of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14651:2005+A1:2007: E2 Contents page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Symbols and abbreviated terms 5 4.1 Symbols 5 4.2 Abbreviations.5 5 Principle6 6 Appar
13、atus .6 7 Test specimens7 7.1 Shape and size of test specimens .7 7.2 Manufacture and curing of test specimens 7 7.3 Notching of test specimens7 8 Testing procedure8 8.1 Preparation and positioning of test specimens .8 8.2 Bending test .10 9 Expression of results 11 9.1 Equivalence between CMOD and
14、deflection.11 9.2 Limit of proportionality .12 9.3 Residual flexural tensile strength 13 10 Test report 14 11 Precision.15 Annex A (informative) Expressions for limit of proportionality and for residual flexural tensile strength.16 BS EN 14651:2005+A1:20073 Foreword This document (EN 14651:2005+A1:2
15、007) has been prepared by Technical Committee CEN/TC 229 “Precast concrete products”, the secretariat of which is held by AFNOR. This document shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2008 and conflicting n
16、ational standards shall be withdrawn at the latest by March 2008. This document includes Amendment 1, approved by CEN on 2007-08-16. This document supersedes EN 14651:2005. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! “. This standard is one of a
17、 series concerned with testing metallic fibered concrete. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, F
18、rance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 14651:2005+A1:20074 1 Scope This European Standard specifies a method of measuring
19、the flexural tensile strength of metallic fibered concrete on moulded test specimen. The method provides for the determination of the limit of proportionality (LOP) and of a set of residual flexural tensile strength values. This testing method is intended for metallic fibres no longer than 60 mm. Th
20、e method can also be used for a combination of metallic fibres and, a combination of metallic fibres with other fibres. 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
21、references, the latest edition of the referenced document (including any amendments) applies. EN 12350-1, Testing fresh concrete Part 1: Sampling. EN 12390-1, Testing hardened concrete Part 1: Shape, dimensions and other requirements for specimens and moulds. EN 12390-2, Testing hardened concrete Pa
22、rt 2: Making and curing specimens for strength tests. EN 12390-4, Testing hardened concrete Part 4: Compressive strength Specification for testing machines. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 crack mouth opening displacement line
23、ar displacement measured by a transducer installed as specified in 7.1 and illustrated in Figure 4, on a prism subjected to a centre-point load F 3.2 deflection linear displacement measured by a transducer installed as specified in 7.1 and illustrated in Figure 5, on a prism subjected to a centre-po
24、int load F 3.3 limit of proportionality stress at the tip of the notch which is assumed to act in an uncracked mid-span section, with linear stress distribution, of a prism subjected to the centre-point load FLdefined in 8.2 3.4 residual flexural tensile strength fictitious stress at the tip of the
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