1、BSI Standards PublicationBS EN 933-6:2014Tests for geometrical propertiesof aggregatesPart 6: Assessment of surface characteristics Flow coefficient of aggregatesBS EN 933-6:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 933-6:2014. Itsupersedes BS EN 933-
2、6:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/502/6, Test methods.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a c
3、ontract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 74434 1ICS 91.100.15Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the au
4、thority of theStandards Policy and Strategy Committee on 30 April 2014.Amendments issued since publicationDate Text affectedBS EN 933-6:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 933-6 April 2014 ICS 91.100.15 Supersedes EN 933-6:2001English Version Tests for geometrical properties of
5、aggregates - Part 6: Assessment of surface characteristics - Flow coefficient of aggregates Essais pour dterminer les caractristiques gomtriques des granulats - Partie 6: Evaluation des caractristiques de surface - Coefficient dcoulement des granulats Prfverfahren fr geometrische Eigenschaften von G
6、esteinskrnungen - Teil 6: Beurteilung der Oberflcheneigenschaften - Fliekoeffizienten von Gesteinskrnungen 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
7、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 (En
8、glish, 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
9、, 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, Switzerla
10、nd, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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 Me
11、mbers. Ref. No. EN 933-6:2014 EBS EN 933-6:2014EN 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 App
12、aratus 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
13、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 Require
14、d 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 Materia
15、l 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 BS EN 933-6:2014EN 933-6:2014 (E) 3 B
16、.2 Fine aggregate . 19 Annex C (informative) Example of test data sheet fine aggregate 20 Bibliography . 21 BS EN 933-6:2014EN 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 Europ
17、ean 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 elem
18、ents 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 su
19、persedes EN 933-6:2001. The main changes to the previous version of EN 933-6 are: - Scope: Updated to conform SC6 resolution n237/2006 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 referenc
20、e 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; -
21、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
22、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, Test
23、s 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 parti
24、cle size distribution Test sieves, nominal size of apertures Part 3: Determination of particle shape Flakiness index BS EN 933-6:2014EN 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 particle
25、s 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 constit
26、uents 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
27、 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. BS EN 933-6:2014EN 933-6:2014 (E) 6 1 Scope This Eur
28、opean 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 w
29、ith 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 flo
30、w 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 9335. Shape and surface texture characteristics also influence the result. NOTE 2 Experience of this test has been generally limited to n
31、atural 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 (
32、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:
33、 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: Determinatio
34、n 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 acc
35、epts 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 co
36、nstant 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 BS EN 933-6:2014EN 933-6:2014 (E) 7 achieve constant mass for specific types and sizes of sample dependent upon the dryin
37、g capacity of the oven used. 3.3 laboratory sample sample intended for laboratory testing 3.4 particle size fraction, di/Difraction 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 coe
38、fficient 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 wh
39、en the shutter has an opening of (42,0 0,2) mm. In the various calculations, the flow time ERof this reference coarse aggregate shall be taken as equal to 100 s and its pre-dried particle density pshall be taken as equal to 2,70 Mg/m3. NOTE At present the only recognized source of reference aggregat
40、e is a stock of quartzite aggregate controlled by the CEREMA, Direction territoriale Normandie Centre, Laboratoire Rgional de Rouen, 10 chemin de la Poudrire, 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.DTerNCcerema.fr An alt
41、ernative 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 ERand the pre-dr
42、ied particle density pof 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 ERSof thi
43、s 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 Ce
44、ntre, Laboratoire Rgional de Rouen, 10 chemin de la Poudrire, 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.DTerNCcerema.fr An alternative source of reference fine aggregate can be used provided that the flow coefficient of tha
45、t 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 ERSand the pre-dried BS EN 933-6:2014EN 933-6:2014 (E) 8 particle density pof this alternative reference fine aggrega
46、te 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 followi
47、ng 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. 6.2.3 Balance, accurate to 0,1 % of the mas
48、s 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
49、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. 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
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