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SLOVENSKI STANDARD
01-september-2022
Zemeljska dela - Geotehnični laboratorijski preskusi - 2. del: Preskus drobljivosti
Earthworks - Geotechnical laboratory tests - Part 2: Fragmentability test standard
Erdarbeiten - Geotechnische Laborversuche - Teil 2: Prüfung der Zertrümmerbarkeit
Terrassements - Essais géotechniques en laboratoire - Partie 2 : Essai de
fragmentabilité
Ta slovenski standard je istoveten z: EN 17542-2:2022
ICS:
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 17542-2
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 93.020
English Version
Earthworks - Geotechnical laboratory tests - Part 2:
Fragmentability test standard
Terrassements - Essais géotechniques en laboratoire - Erdarbeiten - Geotechnische Laborversuche - Teil 2:
Partie 2 : Essai de fragmentabilité Prüfung der Zertrümmerbarkeit
This European Standard was approved by CEN on 20 April 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, Turkey 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 17542-2:2022 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 Symbols and abbreviated terms . 5
5 Test principle . 6
6 Equipment and test material . 6
7 Preparing samples . 6
8 Testing . 7
9 Calculation and expression of results . 7
10 Test report . 8
Annex A (informative) Example of Test report Fragmentability coefficient of rocky material
according to EN 17542-2:202X . 9
Annex B (informative) Alternative size fractions . 11
Bibliography . 12
European foreword
This document (EN 17542-2:2022) has been prepared by Technical Committee CEN/TC 396
“Earthworks”, the secretariat of which is held by AFNOR.
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 December 2022, and conflicting national standards shall
be withdrawn at the latest by December 2022.
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.
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 organisations 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, Turkey and the United
Kingdom.
Introduction
The fragmentability coefficient I is an identification parameter adopted in the classification of materials
FR
for earthworks according to EN 16907-2.
1 Scope
This document defines the principle and the methods for the determination of the “fragmentability
coefficient” of rocky material.
The fragmentability coefficient I distinguishes the behaviour of certain rocky material and is used to
FR
show the change in particle size from the moment that the material is excavated through to its subsequent
implementation and in certain cases during its whole service life. Changes in the particle size occur due
to the structural resistance of the rock being unable to support the mechanical stress to which it is
subjected during its implementation and use.
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.
EN 16907-2, Earthworks - Part 2: Classification of materials
EN 13286-2, Unbound and hydraulically bound mixtures - Part 2: Test methods for laboratory reference
density and water content - Proctor compaction
EN ISO 17892-4, Geotechnical investigation and testing - Laboratory testing of soil - Part 4: Determination
of particle size distribution (ISO 17892-4)
ISO 3310-1, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth
ISO 3310-2, Test sieves — Technical requirements and testing — Part 2: Test sieves of perforated metal
plate
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at
— IEC Electropedia: available at
4 Symbols and abbreviated terms
I Fragmentability coefficient of a rocky material (in percent)
FR
D Particle size below which 10 % of the mass of a grainy material (in millimeter) are
found
d/D Ratio reflecting mate
...