EN 14845-2:2006

Test methods for fibres in concrete - Part 2: Effect on concrete

This European Standard specifies a method for determining the effect of fibres, steel or polymer, on the residual flexural strength of a reference concrete.

Prüfverfahren für Fasern in Beton - Teil 2: Einfluss auf den Beton

Diese Europäische Norm legt ein Verfahren zur Bestimmung des Volumens an Fasern fest, welches einem Referenzbeton beigemengt werden muss, um eine bestimmte Restzugfestigkeit zu erzielen.

Méthodes d'essai des fibres du béton - Partie 2: Effets sur le béton

Metode za preskušanje vlaken v betonu - 2. del: Vpliv na beton

General Information

• Status: Published
• Publication Date: 22-Aug-2006
• Withdrawal Date: 30-May-2008
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: CEN/TC 104 - Concrete ( performance, production, placing and compliance criteria )
• Drafting Committee: CEN/TC 104/WG 11 - Fibres for concrete
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 28-Jun-2024
• Completion Date: 14-Apr-2025
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/128 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on products for concrete, mortar and grout
• Ref Project: SIST EN 14845-2:2006 - Test methods for fibres in concrete - Part 2: Effect on concrete

Overview

EN 14845-2:2006 - Test methods for fibres in concrete - Part 2: Effect on concrete (CEN) specifies a standardized method to determine how fibres (steel or polymer) influence the residual flexural strength of a reference concrete. The standard is designed to quantify post‑crack performance of fibre‑reinforced concrete using a controlled beam bending test and to define the fibre content required to reach specified residual strength levels.

Key topics and requirements

• Scope: Measures the effect of steel or polymer fibres on residual flexural strength of a reference concrete.
• Specimen and test setup: Twelve notched beams, 550 mm × 150 mm × 150 mm, tested in centre‑point loading on a 500 mm span in accordance with EN 14651.
• Age at test: Specimens tested at 28 days.
• Performance criteria: Determine fibre content that achieves an average residual flexural strength of at least:
  • 1.5 MPa at 0.5 mm CMOD (≈ 0.47 mm central deflection)
  • 1.0 MPa at 3.5 mm CMOD (≈ 3.02 mm central deflection)
• Statistics and outliers: Use the Grubbs test per ISO 5725-2 (5% probability) to identify and exclude unrepresentative outliers. Note: with assumed 25% variation, a 12‑beam series gives mean within ±10% (90% confidence).
• Reporting requirements: Detailed documentation for each set of specimens, including:
  • fibre type and properties (material, length, diameter, tensile strength) per EN 14889‑1 / EN 14889‑2
  • fibre content (kg/m³) that meets the two CMOD criteria
  • concrete mix details (compliance with prEN 14845‑1), specimen IDs, dates (manufacture, notching, testing), curing and moisture condition
  • specimen dimensions, notch geometry, span, CMOD/deflection rates, load‑CMOD/load‑deflection curves, limit of proportionality and residual strength values
  • any deviations from the standard

Applications and users

• For manufacturers of steel or polymer fibres validating product performance in concrete.
• For concrete producers, testing laboratories, and R&D teams assessing fibre dosage to achieve specified residual flexural strengths.
• For specifiers and structural engineers who require certified performance data for fibre‑reinforced concrete in design and quality control.
• Useful in product conformity testing, performance benchmarking, and construction material certification.

Related standards

• EN 14651 - test method used for flexural tensile strength measurement
• prEN 14845‑1 - reference concretes for fibre testing
• EN 14889‑1 / EN 14889‑2 - fibre definitions, specifications and conformity (steel and polymer)
• ISO 5725‑2 - statistical method for repeatability/reproducibility (Grubbs test)

Keywords: EN 14845-2:2006, fibres in concrete, residual flexural strength, reference concrete, CMOD, steel fibres, polymer fibres, test method, EN 14651.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Test methods for fibres in concrete - Part 2: Effect on concreteMetode za preskušanje vlaken v betonu - 2. del: Vpliv na betonMéthodes d'essai des fibres du béton - Partie 2: Effets sur le bétonPrüfverfahren für Fasern in Beton - Teil 2: Einfluss auf den BetonTa slovenski standard je istoveten z:EN 14845-2:2006SIST EN 14845-2:2006en91.100.30Beton in betonski izdelkiConcrete and concrete productsICS:SLOVENSKI
STANDARDSIST EN 14845-2:200601-december-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14845-2August 2006ICS 91.100.30 English VersionTest methods for fibres in concrete - Part 2: Effect on concreteMéthodes d'essai des fibres du béton - Partie 2: Influencesur la résistancePrüfverfahren für Fasern in Beton - Teil 2: Einfluss auf denBetonThis European Standard was approved by CEN on 26 June 2006.CEN members are bound to comply 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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.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, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14845-2:2006: E

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 February 2007, and conflicting national standards shall be withdrawn at the latest by May 2008. This document has been drafted by working group 11 “Fibres for concrete”, the Secretariat of which is held by BSI. This European Standard is one of a series dealing with test methods for assessing the performance of Fibres, either steel or polymer, in concrete.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to im
...