SIST EN 933-6:2023
(Main)Tests for geometrical properties of aggregates - Part 6: Assessment of surface characteristics - Flow coefficient of aggregates
Tests for geometrical properties of aggregates - Part 6: Assessment of surface characteristics - Flow coefficient of aggregates
This document specifies the reference method used for type testing, and in case of dispute, for determining the flow coefficient of coarse and fine aggregates. Other methods can be used for other purposes, such as factory production control, provided that an appropriate working relationship with the reference method has been established. Examples of advanced test methods can be found in the Bibliography.
This document applies to coarse aggregate of sizes between 4 mm and 20 mm and to fine aggregate of size up to 2 mm.
NOTE 1 For coarse aggregates between 4 mm and 20 mm, the flow coefficient is linked with the percentage of crushed or broken surfaces of an aggregate and can therefore be used in association with the method specified in EN 933–5. Shape and surface texture characteristics also influence the result.
NOTE 2 Experience of this test has been generally limited to natural aggregates.
Examples of test data sheets are given in informative Annexes A and C.
Annex B (informative) contains precision data.
WARNING - The use of this part of EN 933 can involve hazardous materials, operations and equipment (such as dust, noise and heavy lifts). It does not purport to address all of the safety or environmental problems associated with its use. It is the responsibility of users of this document to take appropriate measures to ensure the safety and health of personnel and the environment prior to application of the standard, and fulfil statutory and regulatory requirements for this purpose.
Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Teil 6: Beurteilung der Oberflächeneigenschaften - Fließkoeffizienten von Gesteinskörnungen
Dieses Dokument legt das Referenzverfahren fest, das für die Erstprüfung und im Streitfall für die Bestimmung des Fließkoeffizienten von groben und feinen Gesteinskörnungen angewendet wird. Für andere Zwecke, speziell im Rahmen der werkseigenen Produktionskontrolle, können andere Verfahren angewendet werden, sofern ein ausreichender Zusammenhang mit dem Referenzverfahren nachgewiesen wurde. Beispiele für andere Prüfverfahren können in den Literaturhinweisen gefunden werden.
Das vorliegende Dokument gilt für grobe Gesteinskörnungen mit Korngrößen zwischen 4 mm und 20 mm und feine Gesteinskörnungen mit Korngrößen bis zu 2 mm.
ANMERKUNG 1 Bei groben Gesteinskörnungen zwischen 4 mm und 20 mm hängt der Fließkoeffizient mit dem Prozentsatz an gebrochenen Körnern einer Gesteinskörnung zusammen und kann deshalb als alternatives Verfahren zu dem in EN 933 5 beschriebenen Verfahren angewendet werden. Das Ergebnis wird auch durch die Form und die Oberflächenbeschaffenheit beeinflusst.
ANMERKUNG 2 Erfahrungen mit diesem Prüfverfahren sind allgemein auf natürliche Gesteinskörnungen begrenzt.
Beispiele für Prüf-Datenblätter sind im informativen Anhang A und im informativen Anhang C enthalten.
Anhang B (informativ) enthält Daten zur Präzision.
WARNUNG - Die Durchführung der in diesem Teil von EN 933 beschriebenen Referenzverfahren kann gefährliche Materialien, Verfahrensschritte oder Gerätschaften (wie Staub, Lärm und Hebezeuge) umfassen. Dieses Dokument erhebt nicht den Anspruch, auf alle Sicherheits oder Umweltprobleme hinzuweisen, die mit seiner Anwendung verbunden sind. Es liegt in der Verantwortung des Anwenders dieses Dokuments, vor der Anwendung geeignete Maßnahmen für die Sicherheit und den Gesundheitsschutz des Personals sowie für den Umweltschutz zu ergreifen und dafür Sorge zu tragen, dass behördliche und gesetzliche Maßnahmen eingehalten werden.
Essais pour déterminer les caractéristiques géométriques des granulats - Partie 6 : Evaluation des caractéristiques de surface - Coefficient d'écoulement des granulats
Le présent document décrit la méthode de référence servant aux essais de type et, en cas de litige, pour la détermination du coefficient d’écoulement des gravillons et des sables. D’autres méthodes peuvent être utilisées pour d’autres besoins, tels que la maitrise de la production des granulats, sous réserve qu’une corrélation appropriée avec la méthode de référence ait été établie. Des exemples de méthodes d’essais avancés se trouvent éventuellement dans la Bibliographie.
Le présent document s’applique aux gravillons de classe granulaire comprise entre 4 mm et 20 mm et des sables de classe granulaire inférieure ou égale à 2 mm.
NOTE 1 Pour les gravillons compris entre 4 mm et 20 mm, le coefficient d’écoulement est lié au pourcentage de surfaces cassées de granulat et peut donc être utilisé pour remplacer la méthode spécifiée dans l’EN 933-5. Les caractéristiques de forme et de texture de surface influent également sur le résultat.
NOTE 2 L'application de cette norme a généralement été limitée aux granulats naturels.
Des exemples de fiches d'essais sont donnés dans les annexes informatives A et C.
L'annexe B (informative) contient des données de fidélité.
AVERTISSEMENT - L'utilisation de cette partie de l'EN 933 peut impliquer des matériaux, des opérations et des équipements dangereux (tels que la poussière, le bruit et les ascenseurs lourds). Elle ne prétend pas traiter de tous les problèmes de sécurité ou d'environnement liés à son utilisation. Il est de la responsabilité des utilisateurs de ce document de prendre les mesures appropriées pour assurer la sécurité et la santé du personnel et de l'environnement avant l'application de la norme, et de satisfaire aux exigences légales et réglementaires à cet effet.
Preskusi geometričnih lastnosti agregatov - 6. del: Ocenjevanje značilnosti površine - Količnik sipkosti agregatov
Ta dokument določa referenčno metodo, ki se uporablja za tipsko preskušanje in v primeru spora za določevanje koeficienta pretoka grobih in finih agregatov. Za druge namene, na primer za kontrolo proizvodnje v obratu, je mogoče uporabiti druge metode, če obstaja primerna delovna povezava z referenčno metodo. Primeri naprednih preskusnih metod so opisani v bibliografiji.
Ta dokument se uporablja za grobe agregate v velikosti od 4 mm do 20 mm in za fine agregate v velikosti do 2 mm.
OPOMBA 1: Pri grobih agregatih velikosti od 4 do 20 mm je koeficient pretoka povezan z odstotkom zdrobljenih ali zlomljenih površin agregata in se zato lahko uporabljajo v povezavi z metodo, določeno v standardu EN 933-5. Na rezultat vplivajo tudi značilnosti oblike in teksture površine.
OPOMBA 2: Izkušnje s tem preskusom so bile na splošno omejene na naravne agregate.
Primeri preskusnih podatkovnih listov so podani v informativnih dodatkih A in C.
Dodatek B (informativni) vsebuje podatke o natančnosti.
OPOZORILO: Uporaba tega dela standarda EN 933 lahko vključuje nevarne materiale, postopke in opremo (na primer prah, hrup in dvigovanje težkih bremen). Ni namenjen obravnavi vseh varnostnih ali okoljskih težav, povezanih z njegovo uporabo. Za sprejetje ustreznih ukrepov za zagotavljanje varnosti oziroma zdravja osebja in okolja pred uporabo standarda ter izpolnjevanje zakonskih in regulativnih zahtev za ta namen so odgovorni uporabniki tega dokumenta.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 933-6:2023
01-maj-2023
Nadomešča:
SIST EN 933-6:2014
Preskusi geometričnih lastnosti agregatov - 6. del: Ocenjevanje značilnosti
površine - Količnik sipkosti agregatov
Tests for geometrical properties of aggregates - Part 6: Assessment of surface
characteristics - Flow coefficient of aggregates
Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Teil 6:
Beurteilung der Oberflächeneigenschaften - Fließkoeffizienten von Gesteinskörnungen
Essais pour déterminer les caractéristiques géométriques des granulats - Partie 6 :
Evaluation des caractéristiques de surface - Coefficient d'écoulement des granulats
Ta slovenski standard je istoveten z: EN 933-6:2022
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
SIST EN 933-6:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 933-6:2023
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SIST EN 933-6:2023
EN 933-6
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2022
EUROPÄISCHE NORM
ICS 91.100.15 Supersedes EN 933-6:2014
English Version
Tests for geometrical properties of aggregates - Part 6:
Assessment of surface characteristics - Flow coefficient of
aggregates
Essais pour déterminer les caractéristiques Prüfverfahren für geometrische Eigenschaften von
géométriques des granulats - Partie 6 : Evaluation des Gesteinskörnungen - Teil 6: Beurteilung der
caractéristiques de surface - Coefficient d'écoulement Oberflächeneigenschaften - Fließkoeffizienten von
des granulats Gesteinskörnungen
This European Standard was approved by CEN on 7 November 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 933-6:2022 E
worldwide for CEN national Members.
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SIST EN 933-6:2023
EN 933-6:2022 (E)
Contents Page
European foreword . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Principle . 7
5 Reference materials . 7
6 Apparatus . 8
6.1 General. 8
6.2 Apparatus for general purposes . 8
6.3 Additional apparatus required for the determination of the flow coefficient of coarse
aggregate . 8
6.4 Additional apparatus required for the determination of the flow coefficient of fine
aggregate . 10
7 Determination of the flow coefficient of coarse aggregate . 12
7.1 General. 12
7.2 Preparation of test portions . 12
7.2.1 Reference coarse aggregate . 12
7.2.2 Test portions . 13
7.3 Procedure . 13
7.3.1 Common test procedure . 13
7.3.2 Reference test . 14
7.3.3 Material sample test . 14
7.4 Calculation and expression of results . 15
7.5 Test report . 15
7.5.1 Required data . 15
7.5.2 Optional data . 15
8 Determination of the flow coefficient of fine aggregate . 16
8.1 General. 16
8.2 Preparation of test portions . 16
8.2.1 Reference fine aggregate . 16
8.2.2 Test portions . 16
8.3 Procedure . 17
8.3.1 Common test procedure . 17
8.3.2 Reference test . 17
8.3.3 Material sample test . 17
8.4 Calculation and expression of results . 17
8.5 Test report . 18
8.5.1 Required data . 18
8.5.2 Optional data . 18
Annex A (informative) Example of test data sheet – coarse aggregate . 19
Annex B (informative) Precision . 21
B.1 Coarse aggregate . 21
B.2 Fine aggregate . 21
2
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SIST EN 933-6:2023
EN 933-6:2022 (E)
Annex C (informative) Example of test data sheet – fine aggregate . 22
Bibliography . 24
3
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SIST EN 933-6:2023
EN 933-6:2022 (E)
European foreword
This document (EN 933-6:2022) has been prepared by the Technical Committee CEN/TC 154
“Aggregates”, the secretariat of which is held by BSI.
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 June 2023, and conflicting national standards shall be
withdrawn at the latest by June 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 933-6:2014.
In comparison with the previous edition EN 933-6:2014, the following technical modifications have
been made:
a) amendment to the Scope, clarifying that the standard does not apply to lightweight aggregates;
b) amendment to the Scope according to the current rules, introducing the three annexes and adding
a warning about potential hazardous materials, operations and equipment;
c) change of the dated normative references to Annex A of EN 1097-6:2013 to undated references. The
references are given for the calculations of masses in 7.2.2, 7.3.1 and 8.2.2. As a consequence, new
notes to 7.2.2 and 8.2.2 have been added, informing that the test method generally applies to
aggregates with water absorption less than about 1,5 %;
d) rewording of Clause 5 Reference materials, using the same text structure as in EN 1097-8. The
information about alternative sources of reference materials has been moved to a new Note;
e) amendment to 6.4.1, including Figure 3, to clarify the verification of aperture dimension;
f) updating of the test reports in 7.5 and 8.5 according to the current rules;
g) amendment to the expressions of numerical results in 8.3, 8.4 and Annex C, for a better precision of
the final result.
This document forms part of a series of tests for geometrical properties of aggregates. Test methods for
other properties of aggregates are covered by the following European standards:
— EN 932 (all parts), Tests for general properties of aggregates
— EN 1097 (all parts), Tests for mechanical and physical properties of aggregates
— EN 1367 (all parts), Tests for thermal and weathering properties of aggregates
— EN 1744 (all parts), Tests for chemical properties of aggregates
— EN 13179 (all parts), Tests for filler aggregate used in bituminous mixtures
The other parts of EN 933 include:
— Part 1: Determination of particle size distribution — Sieving method
— Part 2: Determination of particle size distribution — Test sieves, nominal size of apertures
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SIST EN 933-6:2023
EN 933-6:2022 (E)
— Part 3: Determination of particle shape — Flakiness index
— Part 4: Determination of particle shape — Shape index
— Part 5: Determination of percentage of crushed particles in coarse and all-in natural aggregates
— Part 7: Determination of shell content — Percentage of shells in coarse aggregates
— Part 8: Assessment of fines — Sand equivalent test
— Part 9: Assessment of fines — Methylene blue test
— Part 10: Assessment of fines — Grading of filler aggregates (air jet sieving)
— Part 11: Classification test for the constituents of coarse recycled aggregate
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, Türkiye and the United
Kingdom.
5
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SIST EN 933-6:2023
EN 933-6:2022 (E)
1 Scope
This document specifies the reference method used for type testing, and in case of dispute, for
determining the flow coefficient of coarse and fine aggregates. Other methods can be used for other
purposes, such as factory production control, provided that an appropriate working relationship with
the reference method has been established. Examples of advanced test methods can be found in the
Bibliography.
This document applies to coarse aggregate of sizes between 4 mm and 20 mm and to fine aggregate of
size up to 2 mm. It does not apply to lightweight aggregates.
NOTE 1 For coarse aggregates between 4 mm and 20 mm, the flow coefficient is linked with the percentage of
crushed or broken surfaces of an aggregate and can therefore be used in association with the method specified in
EN 933–5. Shape and surface texture characteristics also influence the result.
NOTE 2 Experience of this test has been generally limited to natural aggregates.
Examples of test data sheets are given in informative Annexes A and C.
Annex B (informative) contains precision data.
WARNING — The use of this part of EN 933 can involve hazardous materials, operations and equipment
(such as dust, noise and heavy lifts). It does not purport to address all of the safety or environmental
problems associated with its use. It is the responsibility of users of this document to take appropriate
measures to ensure the safety and health of personnel and the environment prior to application of the
standard, and fulfil statutory and regulatory requirements for this purpose.
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 932-2, Tests for general properties of aggregates — Part 2: Methods for reducing laboratory samples
EN 932-5, Tests for general properties of aggregates — Part 5: Common equipment and calibration
EN 933-2, Tests for geometrical properties of aggregates — Part 2: Determination of particle size
distribution — Test sieves, nominal size of apertures
EN 933-3, Tests for geometrical properties of aggregates — Part 3: Determination of particle shape —
Flakiness index
EN 1097-6, Tests for mechanical and physical properties of aggregates — Part 6: Determination of particle
density and water absorption
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/ui
— IEC Electropedia: available at https://www.electropedia.org/
6
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SIST EN 933-6:2023
EN 933-6:2022 (E)
3.1
aggregate size
designation of aggregate in terms of lower (d) and upper (D) sieve sizes expressed in terms as d/D
Note 1 to entry: This designation accepts the presence of some particles which will be retained on the upper
sieve (oversize) and some which will pass the lower sieve (undersize).
3.2
constant mass
mass determined by successive weighings performed at least 1 h apart and not differing by more than
0,1 %
Note 1 to entry: In many cases constant mass can be achieved after a test portion has been dried for a pre-
determined period in a specified oven at (110 ± 5) °C. Test laboratories can determine the time required to achieve
constant mass for specific types and sizes of sample dependent upon the drying capacity of the oven used.
3.3
laboratory sample
sample intended for laboratory testing
3.4
size fraction
d /D
i i
fraction of an aggregate passing the larger (D ) of two sieves and retained on the smaller (d )
i i
3.5
test portion
sample used as a whole in a single test
4 Principle
The flow coefficient of an aggregate is the time, expressed in seconds, for a specified volume of aggregate
to flow through a given opening, under specified conditions using a standard apparatus.
5 Reference materials
5.1 Reference coarse aggregate, from a recognized source, with a size fraction of 6,3/10 mm and a
flow time E of (100 ± 2) s when the shutter has an opening of (42,0 ± 0,2) mm. In the various
R
calculations, E shall be taken as equal to 100 s and its pre-dried particle density ρ shall be taken as
R p
3
equal to 2,70 Mg/m .
NOTE 1 At present, the only recognized source of reference coarse aggregate is a stock of quartzite aggregate
controlled by the CEREMA, Direction territoriale Normandie Centre, Laboratoire Régional de Rouen, 10 chemin de
la Poudrière, CS 90245, 76121 Le Grand-Quevilly cedex, France. lrr.dternc@cerema.fr.
NOTE 2 An alternative source of reference coarse aggregate, with the flow time E and the pre-dried particle
R
density ρ , can be used provided that the flow coefficient of that aggregate is established in a controlled
p
experiment carried out in at least ten laboratories, by cross testing against the CEREMA type reference coarse
aggregate.
In case of dispute, the CEREMA type reference coarse aggregate shall be used.
7
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SIST EN 933-6:2023
EN 933-6:2022 (E)
5.2 Reference fine aggregate, from a recognized source, with a size fraction of 0,063/2 mm and a
flow time E of (32 ± 2) s. In the various calculations, E shall be taken as equal to 32 s and its pre-
RS RS
3
dried particle density ρ shall be taken as equal to 2,70 Mg/m .
p
NOTE 1 At present the only recognized source of reference fine aggregate is a siliceous Somme bay fine
aggregate controlled by the CEREMA, Direction territoriale Normandie Centre, Laboratoire Régional de Rouen, 10
chemin de la Poudrière, CS 90245, 76121 Le Grand-Quevilly cedex, France. lrr.dternc@cerema.fr.
NOTE 2 An alternative source of reference fine aggregate, with the flow time E and the pre-dried particle
RS
density ρ , can be used provided that the flow coefficient of that aggregate is established in a controlled
p
experiment carried out in at least ten laboratories, by cross testing against the CEREMA type reference fine
aggregate.
In case of dispute, the CEREMA type reference fine aggregate shall be used.
6 Apparatus
6.1 General
All apparatus, unless otherwise stated, shall conform to the general requirements of EN 932-5.
6.2 Apparatus for general purposes
6.2.1 Test sieves, 0,063 mm, 2 mm, 4 mm, 6,3 mm, 8 mm, 10 mm, 14 mm and 20 mm, with apertures
as specified in EN 933-2.
6.2.2 Ventilated oven, thermostatically controlled to maintain a temperature of (110 ± 5) °C or
equipment for drying the aggregate which does not cause any particle size breakdown.
6.2.3 Balance, accurate to 0,1 % of the mass to be weighed.
6.2.4 Stopwatch or stopclock, to read 0,1 s.
6.3 Additional apparatus required for the determination of the flow coefficient of
coarse
...
SLOVENSKI STANDARD
oSIST prEN 933-6:2021
01-januar-2021
Preskusi geometričnih lastnosti agregatov - 6. del: Ocenjevanje značilnosti
površine - Količnik sipkosti agregatov
Tests for geometrical properties of aggregates - Part 6: Assessment of surface
characteristics - Flow coefficient of aggregates
Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Teil 6:
Beurteilung der Oberflächeneigenschaften - Fließkoeffizienten von Gesteinskörnungen
Essais pour déterminer les caractéristiques géométriques des granulats - Partie 6:
Evaluation des caractéristiques de surface - Coefficient d'écoulement des granulats
Ta slovenski standard je istoveten z: prEN 933-6
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
oSIST prEN 933-6:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 933-6:2021
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oSIST prEN 933-6:2021
DRAFT
EUROPEAN STANDARD
prEN 933-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2020
ICS 91.100.15 Will supersede EN 933-6:2014
English Version
Tests for geometrical properties of aggregates - Part 6:
Assessment of surface characteristics - Flow coefficient of
aggregates
Essais pour déterminer les caractéristiques Prüfverfahren für geometrische Eigenschaften von
géométriques des granulats - Partie 6: Evaluation des Gesteinskörnungen - Teil 6: Beurteilung der
caractéristiques de surface - Coefficient d'écoulement Oberflächeneigenschaften - Fließkoeffizienten von
des granulats Gesteinskörnungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 154.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 933-6:2020 E
worldwide for CEN national Members.
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oSIST prEN 933-6:2021
prEN 933-6:2020 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 5
5 Reference materials . 5
5.1 Coarse aggregate material . 5
5.2 Fine aggregate material . 6
6 Apparatus . 6
6.1 General. 6
6.2 Apparatus for general purposes . 6
6.3 Additional apparatus required for the determination of the flow coefficient of
coarse aggregate . 6
6.4 Additional apparatus required for the determination of the flow coefficient of fine
aggregate . 8
7 Determination of the flow coefficient of coarse aggregate . 10
7.1 General. 10
7.2 Preparation of test portions . 10
7.3 Procedure . 11
7.4 Calculation and expression of results . 12
7.5 Test report . 13
8 Determination of the flow coefficient of fine aggregate . 13
8.1 General. 13
8.2 Preparation of test portions . 13
8.3 Procedure . 14
8.4 Calculation and expression of results . 15
8.5 Test report . 15
Annex A (informative) Example of test data sheet – coarse aggregate . 16
Annex B (informative) Precision . 17
Annex C (informative) Example of test data sheet – fine aggregate . 18
Bibliography . 19
2
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oSIST prEN 933-6:2021
prEN 933-6:2020 (E)
European foreword
This document (prEN 933-6:2020) has been prepared by the Technical Committee CEN/TC 154
“Aggregates”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 933-6:2014.
In comparison with the previous edition, the following technical modifications have been made:
a) amendment to 6.4.1, including Figure 3, to clarify the verification of aperture dimension;
b) amendment to the expressions of numerical results in 8.3, 8.4 and Annex C, for a better precision of
the final result;
c) updating of the test reports in 7.5 and 8.5 according to the current rules.
This document forms part of a series of tests for geometrical properties of aggregates. Test methods for
other properties of aggregates are covered by the following European Standards:
— EN 932 (all parts), Tests for general properties of aggregates
— EN 1097 (all parts), Tests for mechanical and physical properties of aggregates
— EN 1367 (all parts), Tests for thermal and weathering properties of aggregates
— EN 1744 (all parts), Tests for chemical properties of aggregates
— EN 13179 (all parts), Tests for filler aggregate used in bituminous mixtures
The other parts of EN 933 include:
— Part 1: Determination of particle size distribution — Sieving method
— Part 2: Determination of particle size distribution — Test sieves, nominal size of apertures
— Part 3: Determination of particle shape — Flakiness index
— Part 4: Determination of particle shape — Shape index
— Part 5: Determination of percentage of crushed particles in coarse and all-in natural aggregates
— Part 7: Determination of shell content — Percentage of shells in coarse aggregates
— Part 8: Assessment of fines — Sand equivalent test
— Part 9: Assessment of fines — Methylene blue test
— Part 10: Assessment of fines — Grading of filler aggregates (air jet sieving)
— Part 11: Classification test for the constituents of coarse recycled aggregate
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1 Scope
This document specifies the reference method used for type testing, and in case of dispute, for
determining the flow coefficient of coarse and fine aggregates. Other methods can be used for other
purposes, such as factory production control, provided that an appropriate working relationship with
the reference method has been established. Examples of advanced test methods can be found in the
Bibliography.
This document applies to coarse aggregate of sizes between 4 mm and 20 mm and to fine aggregate of
size up to 2 mm.
NOTE 1 For coarse aggregates between 4 mm and 20 mm, the flow coefficient is linked with the percentage of
crushed or broken surfaces of an aggregate and can therefore be used in association with the method specified in
EN 933–5. Shape and surface texture characteristics also influence the result.
NOTE 2 Experience of this test has been generally limited to natural aggregates.
Examples of test data sheets are given in informative Annexes A and C.
Annex B (informative) contains precision data.
WARNING – The use of this part of EN 933 can involve hazardous materials, operations and equipment
(such as dust, noise and heavy lifts). It does not purport to address all of the safety or environmental
problems associated with its use. It is the responsibility of users of this document to take appropriate
measures to ensure the safety and health of personnel and the environment prior to application of the
standard, and fulfil statutory and regulatory requirements for this purpose.
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 932-2, Tests for general properties of aggregates - Part 2: Methods for reducing laboratory samples
EN 932-5, Tests for general properties of aggregates - Part 5: Common equipment and calibration
EN 933-2, Tests for geometrical properties of aggregates - Part 2: Determination of particle size
distribution - Test sieves, nominal size of apertures
EN 933-3, Tests for geometrical properties of aggregates - Part 3: Determination of particle shape -
Flakiness index
EN 1097-6:2013, Tests for mechanical and physical properties of aggregates - Part 6: Determination of
particle density and water absorption
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp/ui
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3.1
aggregate size
designation of aggregate in terms of lower (d) and upper (D) sieve sizes expressed in terms as d/D
Note 1 to entry: This designation accepts the presence of some particles which will be retained on the upper
sieve (oversize) and some which will pass the lower sieve (undersize).
3.2
constant mass
mass determined by successive weighings performed at least 1 h apart and not differing by more than
0,1 %
Note 1 to entry: In many cases constant mass can be achieved after a test portion has been dried for a pre-
determined period in a specified oven at (110 ± 5) °C. Test laboratories can determine the time required to achieve
constant mass for specific types and sizes of sample dependent upon the drying capacity of the oven used.
3.3
laboratory sample
sample intended for laboratory testing
3.4
particle size fraction
d /D
i i
fraction of an aggregate passing the larger (D ) of two sieves and retained on the smaller (d )
i i
3.5
test portion
sample used as a whole in a single test
4 Principle
The flow coefficient of an aggregate is the time, expressed in seconds, for a specified volume of aggregate
to flow through a given opening, under specified conditions using a standard apparatus.
5 Reference materials
5.1 Coarse aggregate material
A 6,3/10 mm reference aggregate with a flow time of (100 ± 2) s when the shutter has an opening of
(42,0 ± 0,2) mm.
In the various calculations, the flow time E of this reference coarse aggregate shall be taken as equal to
R
3
100 s and its pre-dried particle density ρ shall be taken as equal to 2,70 Mg/m .
p
NOTE At present, the only recognized source of reference aggregate is a stock of quartzite aggregate
controlled by the CEREMA, Direction territoriale Normandie Centre, Laboratoire Régional de Rouen, 10 chemin de
la Poudrière, CS 90245, 76121 Le Grand-Quevilly cedex, France. {Telephone: + (33) 2 35 68 81 00 – Fax: + (33) 2
35 68 81 72 – e-mail: LRR.DTerNC@cerema.fr}
An alternative source of reference coarse aggregate can be used provided that the flow coefficient of
that aggregate is established in a controlled experiment carried out in at least 10 laboratories, by cross
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testing against the LRPC reference coarse aggregate. In this case, the flow time E and the pre-dried
R
particle density ρ of this alternative reference coarse aggregate should be used. In case of dispute, the
p
LRPC reference coarse aggregate should be used.
5.2 Fine aggregate material
A 0,063/2 mm reference aggregate with a flow time of (32 ± 2) s.
In the various calculations, the flow time E of this reference fine aggregate shall be taken as equal to
RS
3
32 s and its pre-dried particle density shall be taken as equal to 2,70 Mg/m .
NOTE At present the only recognized source of reference aggregate is a siliceous Somme bay fine aggregate
controlled by the CEREMA, Direction territoriale Normandie Centre, Laboratoire Régional de Rouen, 10 chemin de
la Poudrière, CS 90245, 76121 Le Grand-Quevilly cedex, France. {Telephone: + (33) 2 35 68 81 00 – Fax: + (33) 2
35 68 81 72 – e-mail: LRR.DTerNC@cerema.fr}
An alternative source of reference fine aggregate can be used provided that the flow coefficient of that
aggregate is established in a controlled experiment carried out in at least 10 laboratories, by cross
and the pre-dried
testing against the LRPC reference fine aggregate. In this case, the flow time ERS
particle density ρ of this alternative reference fine aggregate should be used. In case of dispute, the
p
LRPC reference fine aggregate should be used.
6 Apparatus
6.1 General
All apparatus, unless otherwise stated, shall conform to the general requirements of EN 932-5.
6.2 Apparatus for general purposes
6.2.1 Test sieves, 0,063 mm, 2 mm, 4 mm, 6,3 mm, 8 mm, 10 mm, 14 mm and 20 mm, with apertures
as specified in EN 933-2.
6.2.2 Ventilated oven, thermostatically controlled to maintain a temperature of (110 ± 5) °C or
equipment for drying the aggregate which does not cause any particle size breakdown.
6.2.3 Balance, accurate to 0,1 % of the mass to be weighed.
6.2.4 Stopwatch or stopclock, to read 0,1 s.
6.3 Additional apparatus required for the determination of the flow coefficient of
coarse aggregate
6.3.1 Bar sieves, conforming to EN 933-3, with apertures of 4 mm and 5 mm.
6.3.2 Container, of volume approximately 10 l.
6.3.3 Vibratory table, (Figure 1) comprising the following parts:
6.3.3.1 Bubble level, incorporated in the upper platform of the table and capable of setting in a
horizontal position.
6.3.3.2 Four rubber suspensions, of shore hardness (160 ± 30) N/mm joining the upper platform of
the table to the support frame.
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6.3.3.3 Vibrator, using unbalanced weights, fixed under the platform; with its axis of rotation
horizontal and perpendicular to the axis of the flow channel. The speed of rotation shall be
(2970 ± 20) revolutions/min and the amplitude (0,18 ± 0,02) mm when the flow unit is empty.
6.3.3.4 Baseplate, of mass (100 ± 10) kg, fixed under the frame.
Dimensions in millimetres
Key
1 vibratory platform 5 tube for test portion (see 6.3.4.1 and detail in Figure 2)
2 rubber suspension (see 6.3.3.2) 6 flow channel (see detail in Figure 2)
3 vibrator (see 6.3.3.3)
4 baseplate (see 6.3.3.4)
Figure 1 — Vibratory table and flow unit for coarse aggregate
6.3.4 Flow unit, of total mass (42,3 ± 0,1) kg (Figure 2) comprising the following:
6.3.4.1 Plastic tube for test portion, inside diameter (125 ± 2) mm and height (610 ± 10) mm.
6.3.4.2 Metal shutter, to adjust the height of the opening between (40 ± 1) mm and (60 ± 1) mm.
NOTE The height of the opening can be checked by using metal gauge block of a given height ± 0,1 mm.
6.3.4.3 Metal movable flap, to release the flow of material.
6.3.4.4 Metal flow channel, with a slope of (10,0 ± 0,5)°, a width of (90 ± 1) mm and fitted with plastic
s
...
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