BS EN 933-1-2012 Tests for geometrical properties of aggregates Determination of particle size distribution Sieving method《集料的几何特性试验 粒度分布测定 筛法》.pdf

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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 933-1:2012Tests for geometrical properties of aggregatesPart 1: Determination of particle size distribution Sieving methodBS EN 933-1:2012 BRITISH STANDARDNational foreword

2、This British Standard is the UK implementation of EN 933-1:2012. It supersedes BS EN 933-1:1997, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/502/6, Test methods.A list of organizations represented on this committee can be obtained on request to i

3、ts secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 74432 7 ICS 91.100.15 Compliance with a British Standar

4、d cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 February 2012.Amendments issued since publicationDate Text affectedBS EN 933-1:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 933-1 J

5、anuary 2012 ICS 91.100.15 Supersedes EN 933-1:1997English Version Tests for geometrical properties of aggregates - Part 1: Determination of particle size distribution - Sieving method Essais pour dterminer les caractristiques gomtriques des granulats - Partie 1: Dtermination de la granularit - Analy

6、se granulomtrique par tamisage Prfverfahren fr geometrische Eigenschaften von Gesteinskrnungen - Teil 1: Bestimmung der Korngrenverteilung - Siebverfahren This European Standard was approved by CEN on 29 October 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which st

7、ipulate 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 Europea

8、n 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 t

9、he 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, Romania, Slovakia, Slovenia, Spain, Sweden,

10、Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membe

11、rs. Ref. No. EN 933-1:2012: EBS EN 933-1:2012 EN 933-1:2012 (E) 2 Contents Page Foreword . . 3g31 Scope. 4g32 Normative references . . 4g33 Terms and definitions . . 4g34 Principle . . 5g35 Apparatus . 5g36 Preparation of test portions . . 5g37 Procedure . 6g37.1 Washing . . 6g37.2 Sieving. 7g37.3 W

12、eighing . 8g38 Calculation and expression of results 8g38.1 Calculations . . 8g38.2 Validating the results . 8g38.3 Precision . 9g39 Test report . . 9g39.1 Required data . 9g39.2 Optional data . . 9g3Annex A (normative) Alternative test method for all-in aggregate with D 31,5 mm . 11g3A.1 Principle

13、. . 11g3A.2 Apparatus . 11g3A.3 Procedure . 11g3A.3.1 Preparation of the initial test portion . 11g3A.3.2 First washing stage particles retained on the 16 mm size test sieve . . 12g3A.3.3 First dry sieving stage particles retained on the 16 mm size test sieve . 12g3A.3.4 Preparation stage dry subsam

14、ple passing the 16 mm size test sieve . . 12g3A.3.5 Second washing stage reduced subsample passing the 16 mm size test sieve . . 12g3A.3.6 Second dry sieving stage reduced subsample passing the 16 mm size test sieve . 12g3A.4 Calculation and expression of results 13g3A.4.1 Original dry mass . 13g3A.

15、4.2 Mass retained on the sieves at the first dry sieving stage . 13g3A.4.3 Mass retained on the sieves at the second dry sieving stage . 13g3A.4.4 Mass of fines passing the 0,063 mm sieve . 13g3A.4.5 Particle size distribution. . 14g3A.4.6 Validating the results . 14g3Annex B (normative) Test method

16、 for aggregates unsuitable for oven-drying . . 15g3Annex C (informative) Example of test data sheet . 16g3Annex D (informative) Graphical presentation of results . . 17g3Bibliography . . 18g3BS EN 933-1:2012 EN 933-1:2012 (E) 3 Foreword This document (EN 933-1:2012) has been prepared by Technical Co

17、mmittee 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 July 2012, and conflicting national standards shall be withdrawn at the la

18、test by July 2012. 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 supersedes EN 933-1:1997. EN 933 Tests for geometrica

19、l properties of aggregates, consists of the following parts: 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

20、of particle shape Shape index; Part 5: Determination of percentage of crushed and broken surfaces in coarse aggregate particles; Part 6: Assessment of surface characteristics Flow coefficient of aggregates; Part 7: Determination of shell content Percentage of shells for coarse aggregates; Part 8: As

21、sessment 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

22、 national standards organizations 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, Netherl

23、ands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 933-1:2012 EN 933-1:2012 (E) 4 1 Scope This European Standard describes the reference washing and dry sieving method used for type testing and in case of dispute, for determi

24、nation of the particle size distribution of 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. It applies to all aggregates, including lightweight aggre

25、gates, up to 90 mm nominal size, but excluding filler. NOTE 1 The determination of the grading of fillers is specified in EN 933-10 Assessment of fines Grading of filler aggregates (air jet sieving). NOTE 2 Dry sieving without washing may be used for aggregates free from particles which cause agglom

26、eration. 2 Normative references The following referenced documents are indispensable for the application 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 f

27、or general properties of aggregates Part 2: Methods for reducing laboratory samplesEN 932-5, Tests for general properties of aggregates Part 5: Common equipment and calibrationEN 933-2, Tests for geometrical properties of aggregates Part 2: Determination of particle size distribution Test sieves, no

28、minal size of apertures 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 For the purposes of this document, the following

29、 terms and definitions apply. 3.1 aggregate granular material used in construction which may be natural, manufactured or recycled 3.2 test portion sample used as a whole in a single test 3.3 constant mass mass determined by successive weighings performed at least 1 h apart and not differing by more

30、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 (see 5.3) at (110 5) C. Test laboratories may determine the time required to achieve constant mass for specific types and sizes of sample dependent upon the

31、 drying capacity of the oven used. BS EN 933-1:2012 EN 933-1:2012 (E) 5 4 Principle The test consists of dividing and separating a material into several particle size classifications of decreasing sizes by means of a series of sieves,. The aperture sizes and the number of sieves are selected in acco

32、rdance with the nature of the sample and the accuracy required. The method adopted is washing and dry sieving. When washing can alter the physical properties of a lightweight aggregate, dry sieving shall be used and the procedure specified in 7.1 shall not be applied. The mass of the particles retai

33、ned on the various sieves is related to the initial mass of the material. The cumulative percentages passing each sieve are reported in numerical form and, when required, in graphical form (see Annex D). 5 Apparatus Unless otherwise stated, all apparatus shall conform to the general requirements of

34、EN 932-5. 5.1 Test sieves, with apertures as specified in EN 933-2 and conforming to the requirements of ISO 3310-1 and ISO 3310-2. 5.2 Tightly fitting pan and lid, for the sieves. 5.3 Ventilated oven, thermostatically controlled to maintain a temperature of (110 5) C, or other suitable equipment fo

35、r drying the aggregates, if it does not cause any particle size breakdown. 5.4 Washing equipment. 5.5 Balances or scales, accurate to 0,1 % of test portion mass. 5.6 Trays, brushes. 5.7 Sieving machine, (optional). 6 Preparation of test portions Samples shall be reduced in accordance with EN 932-2 t

36、o produce the required number of test portions. NOTE It may be necessary to moisten samples containing substantial amounts of fines before reduction to minimise segregation and loss of dust. The size of each test portion shall be as specified in Table 1. BS EN 933-1:2012 EN 933-1:2012 (E) 6 Table 1

37、Minimum size of test portions Aggregate size D mass of aggregates volume of lightweight aggregates (litres) (maximum) mm kg 90 80 -32 10 2,116 2,6 1,7 8 0,6 0,8 4 0,2 0,3 NOTE 1 For aggregates of other sizes below 90 mm, the minimum test portion mass may be interpolated from the masses given in Tabl

38、e 1 using the following formulae: M = (D/10)2where M = minimum mass of test portion in kg D = aggregate size in mm NOTE 2 The precision of the test method may be reduced if the test portion size is less than the value in Table 1. In such a case, the test portion size should be stated in the test rep

39、ort (9.2). NOTE 3 For aggregates of particle density higher than 3,00 Mg/m3(see EN 1097-6), an appropriate correction should be applied to the test portion masses given in Table 1 based on the density ratio, in order to produce a test portion of approximately the same volume as those for aggregates

40、of normal density. NOTE 4 For lightweight aggregates complying with EN 13055, use the volume column to choose the appropriate minimum size of test portions. The volumes for other aggregate sizes may be interpolated. Sample reduction shall yield a test portion of size larger than the minimum but not

41、of an exact predetermined value. Dry the test portion by heating at a temperature of (110 5) C to constant mass. Allow to cool, weigh and record the mass as M1. For some types of aggregate, drying at 110 C binds particles together sufficiently strongly to prevent separation of single particles durin

42、g subsequent washing and/or sieving procedures. For such aggregates the procedure given in Annex B shall be adopted. For all-in aggregates with D equal to 31,5 mm or larger, the procedure described in Annex A may be used. 7 Procedure 7.1 Washing Place the test portion in a container and add sufficie

43、nt water to cover the test portion. NOTE 1 A storage period of 24 h under water is helpful in breaking down lumps. A dispersion agent may be used. Agitate the sample with sufficient vigour to result in complete separation and suspension of the fines. Wet both sides of a 0,063 mm sieve reserved for u

44、se in this test only, and fit a guard sieve (e.g. 1 mm or 2 mm) on top. Mount the sieves in such a way that the suspension passing the test sieve can be run to BS EN 933-1:2012 EN 933-1:2012 (E) 7 waste or, when required, collected in a suitable vessel. Pour the contents of the container on to the t

45、op sieve. Continue washing until the water passing the 0,063 mm test sieve is clear. NOTE 2 Care should be taken to prevent overloading, overflowing or damaging the 0,063 mm test sieve or the guard sieve. For some aggregates, it will be necessary to pour only the suspended fines from the container o

46、nto the 0,063 mm guarded test sieve, continuing to wash the coarse residue in the container and decanting the suspended fines onto the guard sieve until the water passing the 0,063 mm test sieve is clear. Dry the residue retained on the 0,063 mm sieve at (110 5) C to constant mass. Allow to cool, we

47、igh and record as M2. 7.2 Sieving Pour the washed and dried material (or directly the dry sample) into the sieving column. The column comprises a number of sieves fitted together and arranged, from top to bottom, in order of decreasing aperture sizes with the pan and lid. NOTE 1 Experience has shown

48、 that washing does not necessarily remove all the fines. It is therefore necessary to incorporate a 0,063 mm test sieve in the series. Shake the column, manually or mechanically. Then remove the sieves one by one, commencing with the largest aperture size opening. Shake each sieve manually ensuring

49、no material is lost by using a pan and lid for example. NOTE 2 The effectiveness of mechanical sieving is influenced by the aggregate type, the sieving time, the loading on the sieve and the parameters of the shaking movement such as amplitude and frequency. The mechanical sieving time should hence be carefully chosen. Transfer all the material which passes each sieve onto the next sieve in the column before continuing the operation with that sieve. Sieve overloading shall be avoi