EN 933-6:2001
(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 European Standard specifies methods for the determination of the flow coefficient of coarse and fine aggregates. It applies to coarse aggregate of sizes between 4 mm and 20 mm and to fine aggregate of size up to 4 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.
Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Beurteilung der Oberflächeneigenschaften - Teil 6: Fließkoeffizienten von Gesteinskörnungen
Diese Europäische Norm legt ein Verfahren zur Bestimmung des Fließkoeffizienten von groben und feinen Gesteinskörnungen fest. Sie gilt für grobe Gesteinskörnungen mit Korngrößen zwischen 4 mm und 20 mm und feinen Gesteinskörnungen mit Korngrößen bis 4 mm.
ANMERKUNG 1 Für grobe 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 Form und Oberflächenbeschaffenheit beeinflusst.
ANMERKUNG 2 Erfahrungen mit diesem Prüfverfahren sind allgemein auf natürliche Gesteinskörnungen begrenzt.
Essais pour déterminer les caractéristiques géométriques des granulats - Partie 6: Evaluation des caractéristiques de surface - Coefficient d'écoulement des gravillons
La présente norme européenne spécifie des méthodes de détermination du coefficient d'écoulement des gravillons et sables. Elle s'applique aux gravillons de classe granulaire comprise entre 4 mm et 20 mm et des sables de classe granulaire inférieure ou égale à 4 mm.
NOTE 1 Pour les gravillons compris entre 4 mm et 20 mm, le coefficient d'écoulement est lié au pourcentage de surfaces de granulat cassées 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.
Preskusi geometričnih lastnosti agregatov - 6. del: Ocenjevanje značilnosti površine - Količnik sipkosti agregatov
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2002
3UHVNXVLJHRPHWULþQLKODVWQRVWLDJUHJDWRYGHO 2FHQMHYDQMH]QDþLOQRVWL
SRYUãLQH.ROLþQLNVLSNRVWLDJUHJDWRY
Tests for geometrical properties of aggregates - Part 6: Assessment of surface
characteristics - Flow coefficient of aggregates
Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Beurteilung der
Oberflächeneigenschaften - Teil 6: Fließkoeffizienten von Gesteinskörnungen
Essais pour déterminer les caractéristiques géométriques des granulats - Partie 6:
Evaluation des caractéristiques de surface - Coefficient d'écoulement des gravillons
Ta slovenski standard je istoveten z: EN 933-6:2001
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 933-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2001
ICS 91.100.15
English version
Tests for geometrical properties of aggregates - Part 6:
Assessment of surface characteristics - Flow coefficient of
aggregates
Essais pour déterminer les caractéristiques géométriques Prüfverfahren für geometrische Eigenschaften von
des granulats - Partie 6: Evaluation des caractéristiques de Gesteinskörnungen - Teil 6: Beurteilung der
surface - Coefficient d'écoulement des granulats Oberflächeneigenschaften - Fließkoeffizienten von
Gesteinskörnungen
This European Standard was approved by CEN on 30 September 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 933-6:2001 E
worldwide for CEN national Members.
Contents
page
Foreword .3
1 Scope.4
2 Normative references.4
3 Terms and definitions.4
4 Principle .5
5 Materials for the determination of the flow coefficient of coarse aggregate.5
6 Apparatus.5
6.1 General .5
6.2 Apparatus for general purposes.5
6.3 Additional apparatus required for the determination of the flow coefficient of
coarse aggregate.5
6.4 Additional apparatus required for the determination of the flow coefficient of fine
aggregate .9
7 Determination of the flow coefficient of coarse aggregates .9
7.1 General .9
7.2 Preparation of test portions .9
7.2.1 Reference aggregate.9
7.2.2 Test portions.10
7.3 Procedure.10
7.3.1 General .10
7.3.2 Reference test.11
7.3.3 Test procedure .11
7.3.4 Calculation and expression of results .12
7.3.5 Test report.12
8 Determination of the flow coefficient of fine aggregates.13
8.1 General .13
8.2 Preparation of test portions .13
8.3 Procedure.13
8.4 Calculation and expression of results .13
8.5 Test report.14
8.5.1 Required data .14
8.5.2 Optional data .14
Annex A (informative) Example of test data sheet for the determination of the flow
coefficient of coarse aggregates.15
Annex B (informative) Precision .16
B.1 Coarse aggregates.16
B.2 Fine aggregates.16
Annex C (informative) Example of test data sheet for the determination of flow coefficient
of fine aggregates .17
Bibliography .18
Foreword
This European Standard has been prepared by 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 April 2002, and conflicting national standards shall
be withdrawn at the latest by December 2003.
This European Standard forms part of a series of tests for geometrical properties of aggregates. Test
methods for other properties of aggregates will be covered by parts of the following European
Standards:
EN 932, Tests for general properties of aggregates
EN 1097, Tests for mechanical and physical properties of aggregates
EN 1367, Tests for thermal and weathering properties of aggregates
EN 1744, Tests for chemical properties of aggregates
EN 13179, Tests for filler aggregate used in bituminous mixtures
The other parts of EN 933 will be:
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 and broken surfaces in coarse aggregate particles
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 fillers (air jet sieving)
Annexes A, B and C are informative.
This standard includes a Bibliography.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
1 Scope
This European Standard specifies methods for the determination of the flow coefficient of coarse and
fine aggregates. It applies to coarse aggregate of sizes between 4 mm and 20 mm and to fine
aggregate of size up to 4 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.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text, and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references, the latest edition of the publication referred to applies (including
amendments).
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 European Standard the following terms and definitions apply.
3.1
aggregate size
designation of aggregate in terms of lower (d) and upper (D) sieve sizes expressed in terms as d/D
NOTE 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
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
3.3
test portion
sample used as a whole in a single test
3.4
constant mass
successive weighings after drying at least 1 h apart not differing by more than 0,1 %
NOTE 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.
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 Materials for the determination of the flow coefficient of coarse aggregate
A 6,3/10 mm reference aggregate with a particle density of 2,70 Mg/m and a flow time (E ) of
R
(100 ± 2) s when the shutter has an opening of (42,0 ± 0,2) mm. In the formulae where E is used, it
R
shall be taken as equal to 100 s and the particle density shall be taken as equal to 2,70 Mg/m .
NOTE 1 A recognized source of reference aggregate is the Laboratoire Régional des Ponts et
Chaussées (LRPC), Rouen, BP 245, – - 76120 Le Grand-Quevilly, France. {Telephone: + (33) 2 35 68 81 0– -
Fax: + (33) 2 35 69 39 55}
NOTE 2 A National Standards Body can recognize an alternative source of reference aggregate. The flow
coefficient of the alternative source should be established in a controlled experiment carried out in at least ten
laboratories, by cross testing against the LRPC reference aggregate. In case of dispute, the LRPC reference
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, conforming to EN 933-2, of the following aperture sizes:
0,063 mm, 2 mm, 4 mm, 6,3 mm, 8 mm, 10 mm, 14 mm and 20 mm.
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.
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