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SLOVENSKI STANDARD
01-marec-2023
Nadomešča:
SIST EN 15238:2007
SIST EN 15238:2007/AC:2009
Izboljševalci tal in rastni substrati - Določanje količine za materiale z velikostjo
delcev, večjo od 60 mm
Soil improvers and growing media - Determination of quantity for materials with particle
size greater than 60 mm
Bodenverbesserungsmittel und Kultursubstrate - Bestimmung der Menge für Materialien
mit einer Partikelgröße über 60 mm
Amendements du sol et supports de culture - Détermination de la quantité pour les
matériaux de granulométrie supérieure à 60 mm
Ta slovenski standard je istoveten z: EN 15238:2022
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 15238
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2022
EUROPÄISCHE NORM
ICS 65.080 Supersedes EN 15238:2006
English Version
Soil improvers and growing media - Determination of
quantity for materials with particle size greater than 60
mm
Amendements du sol et supports de culture - Bodenverbesserungsmittel und Kultursubstrate -
Détermination de la quantité pour les matériaux de Bestimmung der Menge für Materialien mit einer
granulométrie supérieure à 60 mm Partikelgröße über 60 mm
This European Standard was approved by CEN on 5 July 2022.
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-CENELEC 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-CENELEC 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15238:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 6
5 Apparatus . 6
6 Calibration of the measuring cylinder . 7
7 Sampling . 9
8 Determination of bulk density . 9
9 Calculation and expression of results. 12
10 Determination of quantity by weight . 12
11 Precision . 13
12 Test report . 13
Annex A (informative) Results of an interlaboratory trial to determine bulk density. 14
Bibliography. 15
European foreword
This document (EN 15238:2022) has been prepared by Technical Committee CEN/TC 223 “Soil
improvers and growing media”, the secretariat of which is held by NEN.
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 May 2023 and conflicting national standards shall be
withdrawn at the latest by May 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 15238:2006.
In comparison with the previous edition, the following technical modifications have been made:
— the text has been editorially revised, no technical changes to the described method have been made;
— references in Clause 2 and the Bibliography have been updated;
— the terms and definitions have been aligned with CEN/TS 17732:2022;
— the figure has been replaced by two other figures with an example of the apparatus.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
Soil improvers and growing media are generally traded by volume as the weight of the product can be
greatly affected by the moisture content.
NOTE In this document, mass and weight are used interchangeably with the same meaning.
It is important for both consumers and traders to know the volume of product being traded. Furthermore,
for the cultivation of plants, it is the volume of the product, and not the weight, that is generally important.
The volume is calculated from knowing the weight and bulk density of the product, the latter being
determined from weighing a known reference volume of product. As some soil improvers and growing
media are compressible it is important that this aspect be addressed in the method of determining the
bulk density. A suitably competent person should undertake this testing.
For those materials traded by reference to its mass, this document recognizes the effects the moisture
content can have on the quantity declared. Therefore, for such transactions, any weight is accompanied
by the moisture content so that the solid matter content can be calculated.
1 Scope
This document specifies a method for the determination of quantity of soil improvers and growing media
in bulk and in packages. This method is designed with an appropriate precision level so that it can be used
to validate any quantity determination made.
This document is applicable to material in any form, reconstituted if necessary, but not to plugs, blocks
and slabs sold as such by dimension; for these, see EN 15761.
This document applies to material that is in solid form, but not in block form to be sold by dimension, and
which exceeds the particle size restriction in EN 12580 and where the declared nominal particle size is
greater than 60 mm.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
CEN/TS 17732:2022, Soil improvers and growing media - Terminology
EN 12579:2013, Soil improvers and growing media - Sampling
EN 13040, Soil improvers and growing media - Sample preparation for chemical and physical tests,
determination of dry matter content, moisture content and laboratory compacted bulk density
EN 45501:2015, Metrological aspects of non-automatic weighing instruments
3 Terms and definitions
For the purposes of this document, the terms and definitions given in CEN/TS 17732:2022 and the
following apply.
3.1
batch
lot
quantity of goods manufactured by the same process under the same conditions, at the same time, and
labelled in the same manner and are assumed to have the same characteristics to be sampled using
a particular sampling plan
3.2
bulk material
material that is not packaged
3.3
container
receptacle or vessel in which material is delivered, including a lorry, ship, boat and packaging
3.4
ρ
b
bulk density
indication of how much 1 l of the product weighs, being determined in a standardized way
Note 1 to entry: The bulk density is expressed in grams per litre (g/l) or in kilograms per cubic metre (kg/m ).
Note 2 to entry: ‘Bulk density’ in this document refers to the apparent density in air (based on conventional mass)
and not the density in vacuum.
3.5
package
container and materials contained therein which are delivered and where the packaging remains with
the material after delivery
Note 1 to entry: A package may be a loose-filled sack, a big bale or a compressed block in packaging.
[SOURCE: CEN/TS 17732:2022, 3.1.5, modified – Replaced “container” with “packaging”.]
3.6
quantity
out-turn volume or mass being determined in a standardized way
4 Principle
4.1 For each batch of material, whether for delivery in bulk or in packages, the quantity of material is
determined and declared either by volume or by weight.
4.2 Where the quantity is declared by volume then the material is weighed and then sampled and its
bulk density determined. From this information the volume is calculated (see Clauses 6 to 11).
4.3 Where the quantity is declared by weight then the moisture content is also determined so that the
dry matter weight can be determined and declared (see Clause 12).
NOTE The structure of the material can change with time and handling and this can affect the volume of the
material.
5 Apparatus
5.1 Measuring cylinder, rigid, 50 l ± 1 l with a height to diameter ratio between 0,95:1 and 1:1,
calibrated in accordance with Clause 6. The volume, V , shall be determined to the nearest 20 ml at 20 °C,
with an uncertainty of measurement (k = 2) of no more than 100 ml.
NOTE 1 Information about the measurement and expression of uncertainty is given in the OIML Guide (G1) to
the expression of uncertainty in measurement, (sometimes referred to as GUM) [5].
NOTE 2 A 400 mm internal diameter pipe of height 398 mm with an end cap might be suitable.
NOTE 3 For easy and safe handling of the filled measuring cylinder, lifting and emptying handles are advisable.
For health and safety reasons, the filled measuring cylinder might require two persons to lift it.
5.2 Collar, rigid, of the same diameter as the measuring cylinder (5.1) and with a height of
75 mm ± 5 mm. Equipped with locating lugs to enable it to sit on the measuring cylinder correctly.
5.3 Fall controller, 100 mm ± 5 mm mesh size, held no more than 50 mm above the collar.
The fall controller shall be separated from the measuring cylinder (5.1) with collar (5.2) to avoid jogging
or vibrating material in the measuring cylinder during the filling process.
NOTE Wires crossing each other perpendicularly form the mesh with 100 mm square holes.
5.4 Weighing instrument, used to determine the bulk density of the material by this method
conforming to EN 45501:2015 and with a scale division no larger than 0,01 kg.
NOTE National legislation is likely to require that the equipment be verified before use, and so it will be marked
with the ‘CE’ mark and a green ‘M’ to show it is legal to use for trade purposes, as required by European
Directive 2014/31/EU [4].
The weighing instrument used for determining the mass of the total quantity of product (a bag or
consignment) shall conform to class III of EN 45501:2015.
In order for the error on the weighing instrument to be acceptable the maximum scale interval shall
conform to the requirements in Table 1.
Table 1 — Maximum scale intervals for weighing instruments
Mass Maximum scale interval for Maximum scale interval for
analogue instrument digital instrument
kg g g
up to 100 20 10
> 100 to 1 000 200 100
> 1 000 to 5 000 2 000 1 000
> 5 000 20 000 10 000
5.5 Straight edge, rigid, of rectangular cross section, of thickness not exceeding 5 mm, preferably wit
...