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CEN

EN 14651:2005+A1:2007

(Main)

Test method for metallic fibre concrete - Measuring the flexural tensile strength (limit of proportionality (LOP), residual)

Test method for metallic fibre concrete - Measuring the flexural tensile strength (limit of proportionality (LOP), residual)

This European Standard specifies a method of measuring 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. The method can also be used for a combination of metallic fibres and, a combination of metallic fibres with other fibres.

Prüfverfahren für Beton mit metallischen Fasern - Bestimmung der Biegezugfestigkeit (Proportionalitätsgrenze, residuelle Biegezugfestigkeit)

Méthode d'essai du béton de fibres métalliques - Mesurage de la résistance à la traction par flexion (limite de proportionnalité (LOP), résistance résiduelle)

Preskusna metoda za beton s kovinskimi vlakni - Merjenje upogibne natezne trdnosti (meja proporcionalnosti (LOP), zaostale)

General Information

Status
Published
Publication Date
25-Sep-2007
ICS
91.100.30 - Concrete and concrete products
Technical Committee
CEN/TC 229 - Precast concrete products
Drafting Committee
CEN/TC 229/WG 3 - Products for which the stability requirements is not dominant
Current Stage
9093 - Decision to confirm - Review Enquiry
Completion Date
05-Dec-2022
Ref Project
SIST EN 14651:2005+A1:2008 - Test method for metallic fibre concrete - Measuring the flexural tensile strength (limit of proportionality (LOP), residual)

Relations

Merged From
EN 14651:2005 - Test method for metallic fibered concrete - Measuring the flexural tensile strength (limit of proportionality (LOP), residual)
Effective Date
18-Jan-2023

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Test method for metallic fibre concrete - Measuring the flexural tensile strength (limit of proportionality (LOP), residual)Preskusna metoda za beton s kovinskimi vlakni - Merjenje upogibne natezne trdnosti (meja proporcionalnosti (LOP), zaostale)Méthode d'essai du béton de fibres métalliques - Mesurage de la résistance a la traction par flexion (limite de proportionnalité (LOP), résistance résiduelle)Prüfverfahren für Beton mit metallischen Fasern - Bestimmung der Biegezugfestigkeit (Proportionalitätsgrenze, residuelle Biegezugfestigkeit)Ta slovenski standard je istoveten z:EN 14651:2005+A1:2007SIST EN 14651:2005+A1:2008en,fr,de91.100.30ICS:SLOVENSKI
STANDARDSIST EN 14651:2005+A1:200801-marec-2008

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE 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)
Méthode d'essai du béton de fibres métalliques - Mesurage de la résistance à la traction par flexion (limite de proportionnalité (LOP), résistance résiduelle)
Prüfverfahren für Beton mit metallischen Fasern - Bestimmung der Biegezugfestigkeit (Proportionalitätsgrenze, residuelle Biegezugfestigkeit) This European Standard was approved by CEN on 3 April 2005 and includes Amendment 1 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 national 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 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, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14651:2005+A1:2007: E

Expressions for limit of proportionality and for residual flexural tensile strength.16

ML bending moment corresponding to the load at LOP b width of test specimen fR,j residual flexural tensile strength, j = 1, 2, 3 or 4 fct,Lf LOP hsp distance between the tip of the notch and the top of the test specimen in the mid-span section l length of span x width of notch y distance between bottom of test specimen and axis of displacement transducer δ deflection δFL deflection at LOP δj deflection value, j = 1, 2, 3 or 4 4.2 Abbreviations CMOD crack mouth opening displacement LOP limit of proportionality

Key 1 Supporting roller 2 Loading roller Figure 1 — Arrangement of loading of test specimen All rollers shall be manufactured from steel and shall have a circular cross-section with a diameter of 30 mm ± 1 mm. They shall be at least 10 mm longer than the width of the test specimen. They shall have a clean and smooth surface. Two rollers, including the upper one, shall be capable of rotating freely around their axis and of being inclined in a plane perpendicular to the longitudinal axis of the test specimen. The distance between the centres of the supporting rollers (i.e. the span length) shall be equal to 500 mm. All rollers shall be adjusted to their correct position with all distances having an accuracy of ± 2,0 mm. 6.6 Load measuring device, capable of measuring loads to an accuracy of 0,1 kN.

Key 1 and 2 order of filling Figure 2 — Procedure for filling the mould 7.3 Notching of test specimens Wet sawing shall be used to notch the test specimens. Specimens shall be rotated over 90° around their longitudinal axis and then sawn through the width of specimen at mid-span (see Figure 3).

Key 1 Top surface during casting 2 Notch 3 Cross-section of test specimen Figure 3 — Position of the notch sawn into the test specimen before rotating The width of the notch × shall be 5 mm or less, the distance hsp shall be 125 mm ± 1 mm (see Figure 4). The test specimens shall be cured according to EN 12390-2, unless specified otherwise, for a minimum of 3 days after sawing until no more than 3 h before testing (leaving sufficient time for preparation including any location devices for the transducer(s)). Testing shall normally be performed at 28 days. 8 Testing procedure 8.1 Preparation and positioning of test specimens The averag
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