EN 451-2:2017
(Main)Method of testing fly ash - Part 2: Determination of fineness by wet sieving
Method of testing fly ash - Part 2: Determination of fineness by wet sieving
This European Standard specifies the method for the determination of fly ash fineness by wet sieving on a 0,045 mm sieve (ISO 565).
The European Standard specifies the reference procedure. If other methods are used it needs to be shown that they give results equivalent to those obtained by the reference method. In case of a dispute, only the reference method is used.
Prüfverfahren für Flugasche - Teil 2: Bestimmung der Feinheit durch Nasssieben
Diese Europäische Norm legt das Verfahren zur Bestimmung der Feinheit von Flugasche durch Nasssiebung mit einem Sieb mit einer Maschenweite von 0,045 mm (ISO 565) fest.
Diese Europäische Norm legt das Referenzverfahren fest. Wenn andere Verfahren angewendet werden, ist nachzuweisen, dass die mit diesen Verfahren erzielten Ergebnisse denjenigen des Referenzverfahrens entsprechen. Im Streitfall ist ausschließlich das Referenzverfahren anzuwenden.
Méthode d'essai des cendres volantes - Partie 2: Détermination de la finesse par tamisage humide
La présente Norme européenne spécifie la méthode permettant de déterminer la finesse des cendres volantes par tamisage humide sur un tamis de 0,045 mm (ISO 565).
La présente Norme européenne spécifie la méthode de référence. Si d'autres méthodes sont utilisées, il est nécessaire de démontrer qu'elles permettent d'obtenir des résultats équivalents à ceux obtenus au moyen de la méthode de référence. En cas de litige, seule la méthode de référence est utilisée.
Metoda preskušanja elektrofiltrskega pepela - 2. del: Ugotavljanje finosti z mokrim sejanjem
Ta evropski standard opisuje metodo za ugotavljanje finosti z mokrim sejanjem z 0,045-mm sitom (ISO 565).
Standard opisuje referenčni postopek. Če se uporabljajo druge metode, je treba dokazati, da so rezultati enakovredni rezultatom referenčne metode. V primeru spora se uporablja le referenčna metoda.
General Information
- Status
- Published
- Publication Date
- 02-May-2017
- Withdrawal Date
- 29-Nov-2017
- Technical Committee
- CEN/TC 104 - Concrete ( performance, production, placing and compliance criteria )
- Drafting Committee
- CEN/TC 104/WG 4 - EN 450 fly ash for concrete
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 28-Jun-2024
- Completion Date
- 14-Apr-2025
Relations
- Replaces
EN 451-2:1994 - Method of testing fly ash - Part 2: Determination of fineness by wet sieving - Effective Date
- 26-Mar-2014
Overview
EN 451-2:2017 - Method of testing fly ash, Part 2: Determination of fineness by wet sieving (CEN) - specifies the reference procedure for measuring fly ash fineness using a 0,045 mm (45 µm) sieve (ISO 565). This European Standard defines the apparatus, sample preparation, wet-sieving procedure, calculation method and acceptance criteria. Other test methods may be used only if demonstrated equivalent to this reference; in disputes, the EN 451-2:2017 method is authoritative.
Key topics and technical requirements
- Scope: Determination of fly ash fineness by wet sieving on a 0,045 mm sieve (ISO 565).
- Apparatus & materials:
- Stainless steel sieve frame with 0,045 mm cloth conforming to ISO 565 and ISO 3310-1.
- Spray nozzle (specified hole pattern), pressure gauge, oven (105 ± 5 °C), desiccator, balance (0,001 g), weighing bottle.
- Reagents: distilled water and alcohol (e.g. 2‑butanol) for rinsing.
- Sampling & sample size: Subsample prepared per EN 450-1; test portion typically ~1.0 g oven-dry (constant mass).
- Procedure highlights:
- Dry to constant mass at (105 ± 5) °C.
- Wet-sieve under spray nozzle at (80 ± 5) kPa for (60 ± 10) s; nozzle 10–15 mm below top of frame; swirl ~1 rev/s.
- Rinse, dry to constant mass, cool in desiccator and weigh residue.
- Correction factor:
- Sieve check uses a reference material. Correction factor f = rt / rr (rt = known residue %, rr = measured % retained).
- f must be between 0.8 and 1.2; otherwise replace cloth and re-test.
- Calculation & reporting:
- Fineness r (%) = f × (mS / mO) × 100, reported to one decimal place as mean of two tests.
- If two results differ by >0.3 %, repeat until two within 0.3 %.
- Performance:
- Repeatability standard deviation: 0.02 % by mass.
- Reproducibility standard deviation: 0.07 % by mass.
Applications and users
- Quality control for fly ash used in concrete and cement blends.
- Testing laboratories validating compliance with EN 450-1 and material specifications.
- Concrete producers, cement manufacturers, precast plants, and research institutions assessing pozzolanic material fineness.
- Regulatory bodies and conformity assessment schemes relying on the reference method in disputes.
Related standards
- EN 450-1:2012 - Fly ash for concrete - Definition, specifications and conformity criteria.
- ISO 565 - Test sieves - Nominal sizes of openings.
- ISO 3310-1 - Test sieves - Technical requirements and testing.
- EN 451-1 - Method of testing fly ash - Part 1 (free CaO determination).
Practical keywords: EN 451-2:2017, fly ash fineness, wet sieving, 0.045 mm sieve, ISO 565, concrete quality control, sieve correction factor, wet-sieve procedure.
Frequently Asked Questions
EN 451-2:2017 is a standard published by the European Committee for Standardization (CEN). Its full title is "Method of testing fly ash - Part 2: Determination of fineness by wet sieving". This standard covers: This European Standard specifies the method for the determination of fly ash fineness by wet sieving on a 0,045 mm sieve (ISO 565). The European Standard specifies the reference procedure. If other methods are used it needs to be shown that they give results equivalent to those obtained by the reference method. In case of a dispute, only the reference method is used.
This European Standard specifies the method for the determination of fly ash fineness by wet sieving on a 0,045 mm sieve (ISO 565). The European Standard specifies the reference procedure. If other methods are used it needs to be shown that they give results equivalent to those obtained by the reference method. In case of a dispute, only the reference method is used.
EN 451-2:2017 is classified under the following ICS (International Classification for Standards) categories: 91.100.30 - Concrete and concrete products. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 451-2:2017 has the following relationships with other standards: It is inter standard links to EN 451-2:1994. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 451-2:2017 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Metoda preskušanja elektrofiltrskega pepela - 2. del: Ugotavljanje finosti z mokrim sejanjemPrüfverfahren für Flugasche - Teil 2: Bestimmung der Feinheit durch NasssiebungMéthode d'essai des cendres volantes - Partie 2: Détermination de la finesse par tamisage humideMethod of testing fly ash - Part 2: Determination of fineness by wet sieving91.100.30Beton in betonski izdelkiConcrete and concrete productsICS:Ta slovenski standard je istoveten z:EN 451-2:2017SIST EN 451-2:2017en,fr,de01-september-2017SIST EN 451-2:2017SLOVENSKI
STANDARDSIST EN 451-2:19961DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 451-2
May
t r s y ICS
{ sä s r rä u r Supersedes EN
v w sæ tã s { { vEnglish Version
Method of testing fly ash æ Part
tã Determination of fineness by wet sieving Méthode d 5essai des cendres volantes æ Partie
tã Détermination de la finesse par tamisage humide
Prüfverfahren für Flugasche æ Teil
tã Bestimmung der Feinheit durch Nasssieben This European Standard was approved by CEN on
t y February
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
v w sæ tã t r s y ESIST EN 451-2:2017
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