EN 14845-1:2007

Test methods for fibres in concrete - Part 1: Reference concretes

This European Standard specifies the composition and characteristics of reference concretes used to evaluate the performance of fibres in concrete.
The purpose of the reference concrete is to determine the general suitability of a fibre for use in concrete.
NOTE   The end user needs to satisfy themselves about the effectiveness of the fibre in their own concrete.

Prüfverfahren für Fasern in Beton - Teil 1: Referenzbetone

Diese Europäische Norm legt die Zusammensetzung und die Eigenschaften von Referenzbetonen fest, die zur Bestimmung der Eigenschaften von Fasern in Beton verwendet werden.
Referenzbetone dienen der Beurteilung der allgemeinen Eignung von Fasern für die Verwendung in Beton.
ANMERKUNG   Der Anwender muss die Wirksamkeit der Fasern für den ihm aktuell vorliegenden Beton selbst feststellen.

Méthodes d'essai des fibres dans le béton - Partie 1: Bétons de référence

La présente Norme européenne spécifie la composition et les caractéristiques des bétons de référence utilisés pour évaluer la performance des fibres incorporées dans le béton.
Les bétons de référence servent à déterminer l’aptitude générale d’une fibre à être incorporée dans le béton.
NOTE   L’utilisateur final doit vérifier lui-même l’efficacité de la fibre dans son propre béton.

Metode za preskušanje vlaken v betonu - 1. del: Referenčni betoni

General Information

• Status: Published
• Publication Date: 03-Jul-2007
• 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 14845-1:2007 - Test methods for fibres in concrete - Part 1: Reference concretes

Overview

EN 14845-1:2007 - Test methods for fibres in concrete, Part 1: Reference concretes (CEN) defines standard reference concretes and procedures used to evaluate the performance of steel and polymer fibres in concrete. The standard establishes mix compositions, specimen preparation, curing and reporting requirements so that comparative laboratory tests (e.g., flexural performance) are repeatable and meaningful. Its primary purpose is to determine the general suitability of a fibre for use in concrete; end users must also verify fibre effectiveness in their specific mixes.

Key topics and technical requirements

• Reference concretes: Four types are specified by target flexural tensile strength, maximum aggregate size and maximum cement content.
  • Mandatory mix example: 16 mm or 20 mm aggregate with target flexural tensile strength 4.3 ± 0.3 MPa, W/C ≈ 0.55, max cement 350 kg/m³.
  • Optional higher-strength example: target 5.8 ± 0.4 MPa, W/C ≈ 0.45, max cement 400 kg/m³.
• Materials: Use CEM I 42,5 R cement (EN 197-1), natural silica-based uncrushed aggregates with <2% water absorption, and mixing water per EN 1008. Admixtures (plasticizers/superplasticizers) are allowed per EN 934-2 to meet workability.
• Consistency / workability: Measured by Vebe test (EN 12350-3) - Vebe class V3, or compactability per EN 12350-4 - class C2. Mix must avoid segregation/bleeding.
• Mixing & specimen prep: Forced-action pan mixer; batch volume 50–90% of capacity; add half water to aggregates, mix 2 min, add cement and remaining water, total mix ≤5 min. Fibres added per manufacturer instructions to ensure even dispersion.
• Compaction & moulding: Non-absorbent rigid moulds and high-frequency vibrating table for beam moulds (tests per EN 14845-2 / EN 14651).
• Curing: 24 h in mould at (20 ± 2) °C under polyethylene or ≥95% RH, then demould and water-cure 27 days at (20 ± 2) °C.
• Reporting: Record mix composition (kg/m³), W/C, fibre description (per EN 14889-1/2), particle size, Vebe/compactability, curing, limit of proportionality (LOP) strengths to 0.01 MPa, production date/time and deviations.

Applications and users

• Fibre manufacturers validating product performance for marketing and compliance.
• Independent testing laboratories and research institutes performing comparative fibres in concrete tests (strength and workability).
• Specifiers, product certifiers and R&D teams developing fibre-reinforced concrete mixes and systems (precast, shotcrete, industrial floors, sprayed linings).
• Contractors and precast plants using laboratory reference data to inform in-house trials.

Related standards

• EN 14845-2 (effect on strength), EN 14889-1/2 (fibre definitions), EN 14651 (flexural test), EN 197-1, EN 206-1, EN 1766, EN 12350 series, EN 934-2, EN 933-2, EN 1008.

Keywords: EN 14845-1:2007, reference concrete, fibres in concrete, test methods, flexural tensile strength, water/cement ratio, mix design, specimen preparation, curing.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Test methods for fibres in concrete - Part 1: Reference concretesMéthodes d'essai des fibres dans le béton - Partie 1: Bétons de référencePrüfverfahren für Fasern in Beton - Teil 1: ReferenzbetoneTa slovenski standard je istoveten z:EN 14845-1:2007SIST EN 14845-1:2007en91.100.30Beton in betonski izdelkiConcrete and concrete productsICS:SLOVENSKI
STANDARDSIST EN 14845-1:200701-oktober-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14845-1July 2007ICS 91.100.30 English VersionTest methods for fibres in concrete - Part 1: ReferenceconcretesMéthodes d'essai des fibres dans le béton - Partie 1:Bétons de référencePrüfverfahren für Fasern in Beton - Teil 1: ReferenzbetoneThis European Standard was approved by CEN on 9 June 2007.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 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14845-1:2007: E
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