Tests for geometrical properties of aggregates - Part 6: Assessment of surface characteristics - Flow coefficient of aggregates

EN 933-6 specifies the reference method used for type testing, and in case of dispute, for determining the flow coefficient of coarse and fine aggregates. For other purposes, in particular factory production control, other methods may be used 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 European Standard applies to coarse aggregate of sizes between 4 mm and 20 mm and to fine aggregate of size up to 2 mm.

Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Teil 6: Beurteilung der Oberflächeneigenschaften - Fließkoeffizienten von Gesteinskörnungen

Diese Europäische Norm beschreibt das Referenzverfahren, 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, dürfen andere Verfahren angewendet werden, sofern ein ausreichender Zusammenhang mit dem Referenzverfahren nachgewiesen wurde. Beispiele für andere Prüfverfahren können in den Literatuthinweisen gefunden werden.
Die vorliegende Europäische Norm 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 Prozent¬satz 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 Oberflächen¬beschaffenheit 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 granulats

La présente Norme européenne décrit la méthode de référence servant aux essais de type initiaux et, en cas de litige, pour la détermination du coefficient d’écoulement des gravillons et des sables. Pour les besoins du contrôle de la production en usine en particulier, d’autres méthodes peuvent être utilisées 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.
La présente Norme européenne 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 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

Standard EN 933-6 določa referenčno metodo, ki se uporablja za tipsko preskušanje in v primeru spora za določevanje koeficienta pretoka grobih in finih agregatov. Za druge namene, zlasti za nadzor proizvodnje v obratu, se lahko uporabijo druge metode, če obstaja primerna delovna povezava z referenčno metodo. Primeri naprednih preskusnih metod so opisani v bibliografiji. Ta evropski standard se uporablja za grobe agregate v velikosti od 4 mm do 20 mm in za fine agregate v velikosti do 2 mm.

General Information

Status
Published
Public Enquiry End Date
19-Jul-2011
Publication Date
29-Jun-2014
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-May-2014
Due Date
10-Jul-2014
Completion Date
30-Jun-2014

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.QDþLOQRVWLPrüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Teil 6: Beurteilung der Oberflächeneigenschaften - Fließkoeffizienten von GesteinskörnungenEssais pour déterminer les caractéristiques géométriques des granulats - Partie 6: Evaluation des caractéristiques de surface - Coefficient d'écoulement des granulatsTests for geometrical properties of aggregates - Part 6: Assessment of surface characteristics - Flow coefficient of aggregates91.100.15Mineralni materiali in izdelkiMineral materials and productsICS:Ta slovenski standard je istoveten z:EN 933-6:2014SIST EN 933-6:2014en,fr,de01-julij-2014SIST EN 933-6:2014SLOVENSKI

STANDARDSIST EN 933-6:2002/AC:2004SIST EN 933-6:20021DGRPHãþD
SIST EN 933-6:2014
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 933-6
April 2014 ICS 91.100.15 Supersedes EN 933-6:2001English Version

Tests for geometrical properties of aggregates - Part 6: Assessment of surface characteristics - Flow coefficient of aggregates

Essais pour déterminer les caractéristiques géométriques des granulats - Partie 6: Evaluation des caractéristiques de surface - Coefficient d'écoulement des granulats

Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Teil 6: Beurteilung der Oberflächeneigenschaften - Fließkoeffizienten von Gesteinskörnungen This European Standard was approved by CEN on 6 February 2014.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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:
Avenue Marnix 17,

B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 933-6:2014 ESIST EN 933-6:2014

EN 933-6:2014 (E) 2 Contents Page Foreword ................................................................................................................................................. 4 1 Scope.......................................................................................................................................... 6 2 Normative references ............................................................................................................... 6 3 Terms and definitions ............................................................................................................... 6 4 Principle ..................................................................................................................................... 7 5 Reference materials .................................................................................................................. 7 5.1 Coarse aggregate material ....................................................................................................... 7 5.2 Fine aggregate material ............................................................................................................ 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 ........................................................................................................................... 12 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 .................................................................................. 14 7.5 Test report ............................................................................................................................... 14 7.5.1 Required data .......................................................................................................................... 14 7.5.2 Optional data ........................................................................................................................... 15 8 Determination of the flow coefficient of fine aggregate ...................................................... 15 8.1 General ..................................................................................................................................... 15 8.2 Preparation of test portions ................................................................................................... 15 8.2.1 Reference fine aggregate ....................................................................................................... 15 8.2.2 Test portions ........................................................................................................................... 15 8.3 Procedure ................................................................................................................................ 16 8.3.1 Common test procedure......................................................................................................... 16 8.3.2 Reference test ......................................................................................................................... 16 8.3.3 Material sample test ................................................................................................................ 16 8.4 Calculation and expression of results .................................................................................. 16 8.5 Test report ............................................................................................................................... 17 8.5.1 Required data .......................................................................................................................... 17 8.5.2 Optional data ........................................................................................................................... 17 Annex A (informative)

Example of test data sheet – coarse aggregate
......................................... 18 Annex B (informative)

Precision ......................................................................................................... 19 B.1 Coarse aggregate .................................................................................................................... 19 SIST EN 933-6:2014

EN 933-6:2014 (E) 3 B.2 Fine aggregate ......................................................................................................................... 19 Annex C (informative)

Example of test data sheet – fine aggregate

.............................................. 20 Bibliography ......................................................................................................................................... 21

SIST EN 933-6:2014

EN 933-6:2014 (E) 4 Foreword This document (EN 933-6:2014) 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 October 2014, and conflicting national standards shall be withdrawn at the latest by October 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This document supersedes EN 933-6:2001. The main changes to the previous version of EN 933-6 are: - Scope: Updated to conform SC6 resolution n°237/2006 on the possible use of other test methods under specified conditions, and also to allow the use of advanced test methods; - Clause 5, Reference materials: a reference fine aggregate has been introduced to improve the precision data of the flow coefficient of fine aggregates; - 6.4, Additional apparatus required for the determination of the flow coefficient of fine aggregates: a cylindrical feed hopper has been added to improve the precision data of the test; - 8.5, Test report: the list of required data has been updated; - Annex B, precision, B.2: The precision data for fine aggregate provided by France have been updated following a more recent interlaboratory experiment for which a cylindrical feed hopper was used. 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 are: 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 SIST EN 933-6:2014

EN 933-6:2014 (E) 5 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 filler aggregates (air jet sieving) Part 11: Classification test for the constituents of coarse recycled aggregate 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 933-6:2014

EN 933-6:2014 (E) 6 1 Scope This European Standard specifies the reference method used for type testing, and in case of dispute, for determining the flow coefficient of coarse and fine aggregates. For other purposes, in particular factory production control, other methods may be used 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 European Standard 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. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. 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. 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 SIST EN 933-6:2014

EN 933-6:2014 (E) 7 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, di/Di fraction of an aggregate passing the larger (Di) of two sieves and retained on the smaller (di) 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 ER of this reference coarse aggregate shall be taken as equal to 100 s and its pre-dried particle density p shall be taken as equal to 2,70 Mg/m3. 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 testing against the LRPC reference coarse aggregate. In this case, the flow time ER and the pre-dried particle density p of this alternative reference coarse aggregate should be used. In case of dispute, the 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 ERS of this reference fine aggregate shall be taken as equal to 32 s and its pre-dried particle density shall be taken as equal to 2,70 Mg/m3. 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 testing against the LRPC reference fine aggregate. In this case, the flow time ERS and the pre-dried SIST EN 933-6:2014

EN 933-6:2014 (E) 8 particle density p of this alternative reference fine aggregate should be used. In case of dispute, the 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, 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

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