EN 12948:2010

Liming materials - Determination of size distribution by dry and wet sieving

This European Standard specifies two methods for the determination of the particle size distribution of liming materials.
The dry sieving method (method A) is applicable to all liming materials except wet and paste-like products.
Method A is not applicable, if blinding, caking, electrostatic charges or agglomeration occur after pre drying.
The wet sieving method (method B) is applicable to products which are susceptible to blinding, caking, electrostatic charges or agglomeration after pre drying.
Method B can be used to determine the primary particle size distribution of granulated products.
Method B is not applicable to burnt lime and liming materials containing water-soluble constituents.

Calcium-/Magnesium-Bodenverbesserungsmittel - Bestimmung der Korngrößenverteilung durch Trocken- und Nasssiebung

Diese Europäische Norm legt zwei Verfahren zur Bestimmung der Korngrößenverteilung von
Calcium-/Magnesium-Bodenverbesserungsmitteln fest.
Das Trockensiebverfahren (Verfahren A) gilt für alle Calcium-/Magnesium-Bodenverbesserungsmittel mit
Ausnahme von feuchten und pastösen Produkten.
Verfahren A gilt nicht, wenn nach dem Vortrocknen Verstopfen, Verbacken, elektrostatische Aufladung oder
Agglomeration auftritt.
Das Nasssiebverfahren (Verfahren B) gilt für Produkte, die nach dem Vortrocknen für Verstopfen, Verbacken,
elektrostatische Aufladung oder Agglomeration anfällig sind.
Verfahren B kann angewendet werden, um die Primärkorngrößenverteilung von granulierten Produkten zu
bestimmen.
Verfahren B gilt nicht für gebrannten Kalk und für Calcium-/Magnesium-Bodenverbesserungsmittel, die
wasserlösliche Bestandteile enthalten.

Amendements minéraux basiques - Détermination de la distribution granulométrique par tamisage par voie sèche ou par voie humide

La présente Norme européenne décrit deux méthodes permettant de déterminer la distribution
granulométrique des amendements minéraux basiques.
La méthode de tamisage par voie sèche (méthode A) est applicable à tous les amendements minéraux
basiques, à l'exception des produits humides et pâteux.
La méthode A n'est pas applicable si un colmatage, un mottage, des charges électrostatiques ou une
agglomération se produisent lors du préséchage.
La méthode de tamisage par voie humide (méthode B) est applicable aux produits qui sont susceptibles de
colmater le tamis, de s'agglutiner, de provoquer des charges électrostatiques ou de s'agglomérer lors du
préséchage.
La méthode B peut être utilisée pour déterminer la distribution granulométrique initiale de produits granulés.
La méthode B n'est pas applicable aux chaux ni aux amendements minéraux basiques contenant des
constituants solubles dans l’eau.

Sredstva za apnjenje - Določevanje porazdelitve velikosti delcev s suhim in mokrim sejanjem

Ta evropski standard opredeljuje dve metodi za določevanje porazdelitve velikosti delcev sredstev za apnjenje. Metoda s suhim sejanjem (metoda A) se uporablja za vsa sredstva za apnjenje, razen mokrih proizvodov in proizvodov v obliki paste. Metoda A se ne uporablja, če po predsušenju pride do zamašitve odprtin, strjevanja, elektrostatičnega naboja ali nastajanja skupkov. Metoda z mokrim sejanjem (metoda B) se uporablja za proizvode, pri katerih nastajajo zamašitve odprtin, strjevanje, elektrostatični naboj ali skupki po predsušenju. Metoda B se lahko uporablja za določevanje primarne porazdelitve velikosti delcev granuliranih proizvodov. Metoda B se ne uporablja za žgano apno in sredstva za apnjenje, ki vsebujejo sestavine, topne v vodi.

General Information

• Status: Published
• Publication Date: 09-Nov-2010
• ICS: 65.080 - Fertilizers
• Technical Committee: CEN/TC 260 - Fertilizers and liming materials
• Drafting Committee: CEN/TC 260/WG 3 - Liming materials
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 05-Feb-2021
• Completion Date: 12-Nov-2025
• Ref Project: SIST EN 12948:2011 - Liming materials - Determination of size distribution by dry and wet sieving

Relations

• Replaces: EN 12948:2002 - Liming materials - Determination of size distribution by dry and wet sieving
• Effective Date: 13-Nov-2010

Overview

EN 12948:2010 is a CEN European Standard for determining the particle size distribution of liming materials using two laboratory sieving methods: dry sieving (Method A) and wet sieving (Method B). The standard defines scope, principle, apparatus, sample preparation, test procedure, expression of results, precision data from inter‑laboratory trials, and reporting requirements. Results are expressed on a dry‑matter basis and the document supersedes EN 12948:2002.

Key topics and requirements

• Scope & applicability
  • Method A (dry sieving): suitable for most liming materials except wet or paste‑like products. Not applicable if blinding, caking, electrostatic charging or agglomeration occur after pre‑drying.
  • Method B (wet sieving): used for materials prone to blinding/caking or for determining the primary particle size of granulated products. Not applicable to burnt lime or products containing water‑soluble constituents.
• Principles
  • Method A: dry sieving by hand or mechanical shaker.
  • Method B: wet sieving, with dispersion under continuous water spray when necessary, followed by drying of retained fractions.
• Apparatus & conditions
  • Test sieves conforming to ISO 3310-1 (wire cloth) or perforated plates (granular products), mechanical shaker, balance (0.01 g), oven at (105 ± 2) °C, stopwatch, soft brush.
  • Select up to seven sieve sizes from ISO 565 nominal sizes to cover expected particle range.
• Sample preparation & moisture
  • Sampling itself is not part of the standard; sample prep follows EN 1482-2 and moisture determination uses EN 12048.
• Precision
  • Inter‑laboratory data (1999): for fineness < 1 mm
    • Method A: repeatability r = 6.50%, reproducibility R = 13.90%
    • Method B: repeatability r = 7.64%, reproducibility R = 13.10%
• Reporting
  • Test report must identify the sample, reference the standard, state the method and sieve type, present results (dry basis), and note any deviations or observations.

Applications and users

• Quality control and conformity testing for manufacturers of liming materials, lime and dolomite products and suppliers of agricultural amendments.
• Analytical and QC laboratories performing particle size distribution testing for fertilizer and soil‑improving materials.
• Regulatory bodies, certification agencies and research groups requiring standardized, comparable size distribution data for agronomic performance, dissolution behavior and application suitability.

Related standards

• EN 1482-2 (sample preparation)
• EN 1482-1 (sampling - informative reference)
• EN 12048 (moisture content - gravimetric)
• ISO 3310-1 / ISO 565 (test sieves and nominal sizes)

Keywords: EN 12948, liming materials, particle size distribution, dry sieving, wet sieving, CEN, sieving method, granulated products, sample preparation, precision.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Calcium-/Magnesium-Bodenverbesserungsmittel - Bestimmung der Korngrößenverteilung durch Trocken- und NasssiebungAmendements minéraux basiques - Détermination de la distribution granulométrique par tamisage par voie sèche ou par voie humideLiming materials - Determination of size distribution by dry and wet sieving65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 12948:2010SIST EN 12948:2011en,fr,de01-oktober-2011SIST EN 12948:2011SLOVENSKI
STANDARDSIST EN 12948:20031DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12948
November 2010 ICS 65.080 Supersedes EN 12948:2002English Version
Liming materials - Determination of size distribution by dry and wet sieving
Amendements minéraux basiques - Détermination de la distribution granulométrique par tamisage par voie sèche ou par voie humide
Calcium-/Magnesium-Bodenverbesserungsmittel - Bestimmung der Korngrößenverteilung durch Trocken-und Nasssiebung This European Standard was approved by CEN on 2 October 2010.
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, Croatia, 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:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12948:2010: ESIST EN 12948:2011

(informative)
Results of an inter-laboratory trial to determine the size distribution by dry and wet sieving. 10Bibliography . 11 SIST EN 12948:2011

Method B can be used to determine the primary particle size distribution of granulated products. Method B is not applicable to burnt lime and liming materials containing water-soluble constituents. 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 references, the latest edition of the referenced document (including any amendments) applies. EN 1235:1995, Solid fertilizers — Test sieving (ISO 8397:1988 modified) EN 1482-2, Fertilizers and liming materials — Sampling and sample preparation — Part 2: Sample preparation EN 12048, Solid fertilizers and liming materials — Determination of moisture
content — Gravimetric method by drying at (105 ± 2) °C (ISO 8190:1992 modified) ISO 565, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings ISO 3310-1, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth 3 Principle 3.1 Method A Dry sieving of a liming material with one or more test sieves by hand or using a mechanical sieving machine. 3.2 Method B Wet sieving of a liming material, if necessary after dispersion under continuous water spraying, by hand or using a mechanical sieving machine. Drying of the different fractions retained on the sieves. 4 Apparatus Usual laboratory apparatus and in particular 4.1 to 4.6. 4.1 Balance, capable of weighing to the nearest 0,01 g. SIST EN 12948:2011
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