DIN EN 933-3-2012 Tests for geometrical properties of aggregates - Part 3 Determination of particle shape - Flakiness index German version EN 933-3 2012《集料几何特性的试验 第3部分 颗粒形状的测定 片状指数.pdf

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1、April 2012 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 9

2、1.100.15!$9“1882288www.din.deDDIN EN 933-3Tests for geometrical properties of aggregates Part 3: Determination of particle shape - Flakiness indexEnglish translation of DIN EN 933-3:2012-04Prfverfahren fr geometrische Eigenschaften von Gesteinskrnungen Teil 3: Bestimmung der Kornform - Plattigkeitsk

3、ennzahlEnglische bersetzung von DIN EN 933-3:2012-04Essais pour dterminer les caractristiques gomtriques des granulats Partie 3: Dtermination de la forme des granulats - Coefficient daplatissementTraduction anglaise de DIN EN 933-3:2012-04SupersedesDIN EN 933-3:2003-12www.beuth.deDocument comprises

4、13 pagesIn case of doubt, the German-language original shall be considered authoritative.03.12 DIN EN 933-3:2012-04 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 154 “Aggregates” (Secretariat: BSI, United Kingdom). The respon

5、sible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-03-13 AA Gemeinschafts-arbeitsausschuss NMP/FGSV: Gesteinskrnungen; Prfverfahren, Petrographie, Probenahme und Przision. Amendments This standard dif

6、fers from DIN EN 933-3:2003-12 as follows: a) in Clause 1 “Scope” it is stated that for other purposes, in particular for production control, other methods may be used; b) the standard has been editorially revised. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 933-3 January 2012 ICS 91.100.15

7、 Supersedes EN 933-3:1997English Version Tests for geometrical properties of aggregates - Part 3: Determination of particle shape - Flakiness index Essais pour dterminer les caractristiques gomtriques des granulats - Partie 3: Dtermination de la forme des granulats - Coefficient daplatissement Prfve

8、rfahren fr geometrische Eigenschaften von Gesteinskrnungen - Teil 3: Bestimmung der Kornform - Plattigkeitskennzahl This European Standard was approved by CEN on 29 October 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

9、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 ver

10、sions (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

11、, 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, Switzerland, Turkey and United Kingdom.

12、 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 Members. Ref. No. EN 933-3:2012: EEN 933-3:2

13、012 (E) 2 Contents Page Foreword . 31 Scope 52 Normative references . 53 Terms and definitions . 54 Principle . 65 Apparatus 66 Preparation of test portions . 87 Procedure 87.1 Sieving on test sieves. 87.2 Sieving on bar sieves . 88 Calculation and expression of results 89 Test report . 99.1 Mandato

14、ry data 99.2 Optional data . 9Annex A (informative) Example of test data sheet 10Annex B (informative) Precision . 11DIN EN 933-3:2012-04 EN 933-3:2012 (E) 3 Foreword This document (EN 933-3:2012) has been prepared by Technical Committee CEN/TC 154 “Aggregates”, the secretariat of which is held by B

15、SI. 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 latest by July 2012. Attention is drawn to the possibility that some of

16、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 933-3:1997. The following changes have been made to the previous edition: a) the CEN Technical Specification

17、has been adopted as European Standard; b) the document has been editorially revised. This standard forms part of a series of tests for geometrical properties of aggregates. Test methods for other properties are covered by the following European Standards: EN 932 Tests for general properties of aggre

18、gates; 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. EN 933, Tests for geometrical properties

19、 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 of particle

20、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: Assessment of

21、fines Sand equivalent test; DIN EN 933-3:2012-04 EN 933-3:2012 (E) 4 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/CENE

22、LEC Internal Regulations, the 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, Lithuani

23、a, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 933-3:2012-04 EN 933-3:2012 (E) 5 1 Scope This European Standard describes the reference method, used for type testing and in case of dispute, f

24、or determination of the flakiness index of aggregates. For other purposes, in particular production control, other methods may be used, provided that an appropriate working relationship with the reference method has been established. This European Standard applies to natural, manufactured or recycle

25、d aggregates. The test procedure specified in this part of this European Standard is not applicable to particle sizes less than 4 mm or greater than 100 mm. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its

26、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 genera

27、l properties of aggregates Part 5: Common equipment and calibration EN 933-1, Tests for geometrical properties of aggregates Part 1: Determination of particle size distribution Sieving method EN 933-2, Tests for geometrical properties of aggregates Part 2: Determination of particle size distribution

28、 Test sieves, nominal size of apertures 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 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

29、nstant mass can be achieved after a test portion has been dried for a pre-determined period in a specified oven (see 5.4) 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 use

30、d. 3.2 laboratory sample sample intended for laboratory testing 3.3 particle size fraction(di/Di) fraction of an aggregate passing the larger (Di) of two sieves and retained on the smaller (di) Note 1 to entry: The lower limit for dimay be zero. 3.4 test portion sample used as a whole in a single te

31、st DIN EN 933-3:2012-04 EN 933-3:2012 (E) 6 4 Principle The test consists of two sieving operations. First, using test sieves, the sample is separated into various particle size fractions di/Di, as given in Table 1. Each of the particle size fractions di/Diis then sieved using bar sieves which have

32、parallel slots of width Di/2. The overall flakiness index is calculated as the total mass of particles passing the bar sieves expressed as a percentage of the total dry mass of particles tested. If required, the flakiness index of each particle size fraction di/Diis calculated as the mass of particl

33、es passing the corresponding bar sieve, expressed as a percentage by mass of that particle size fraction. 5 Apparatus All apparatus shall conform to the general requirements of EN 932-5. 5.1 Test sieves, with square apertures, conforming to EN 933-2 with the following aperture sizes: 100 mm; 80 mm;

34、63 mm; 50 mm; 40 mm; 31,5 mm; 25 mm; 20 mm; 16 mm; 12,5 mm; 10 mm; 8 mm, 6,3 mm; 5 mm and 4 mm. 5.2 Corresponding bar sieves, comprising parallel cylindrical bars conforming to the requirements in Table 1. The tolerances on the width of slot shall apply to the entire length of each slot. An example

35、of a bar sieve is shown in Figure 1. Table 1 Bar sieves Particle size fraction di/DiWidth of slot in bar sieve mm mm80/100 50 0,5 63/80 40 0,5 50/63 31,5 0,5 40/50 25 0,4 31,5/40 20 0,4 25/31,5 16 0,4 20/25 12,5 0,4 16/20 10 0,2 12,5/16 8 0,2 10/12,5 6,3 0,2 8/10 5 0,2 6,3/8 4 0,15 5/6,3 3,15 0,15 4

36、/5 2,5 0,15 DIN EN 933-3:2012-04 EN 933-3:2012 (E) 7 Key 1 metal frame (outside wooden frame optional) 2 width of slot as specified in Table 1 3 cylindrical steel bars (usual diameter range from 5 to 15 mm depending on width of slot) L = 250 mm to 300 mm H = 75 mm h = 55 mm to 65 mm NOTE L being con

37、stant for all range of bar sieves, the width of the last slot cannot be equal to the nominal value. In all cases, it should be smaller than the nominal value. Figure 1 Example of a bar sieve 5.3 Balance or scale, accurate to 0,1 % of the mass of the test portion. 5.4 Ventilated oven, thermostaticall

38、y controlled to maintain a temperature of (110 5) C or other suitable equipment for drying the aggregates, without causing any particle size breakdown. DIN EN 933-3:2012-04 EN 933-3:2012 (E) 8 6 Preparation of test portions The laboratory sample shall be reduced in accordance with EN 932-2. The mass

39、 of the test portion shall be as specified in EN 933-1. Dry the test portion at (110 5) C to constant mass. Allow to cool, weigh and record the mass as M0. 7 Procedure 7.1 Sieving on test sieves Using the appropriate range of sieves from those specified in 5.1, sieve the test portion as specified in

40、 EN 933-1. Weigh and discard all particles passing the 4 mm sieve and retained on the 100 mm sieve. Weigh and retain separately all the particles in each particle size fraction di/Di. 7.2 Sieving on bar sieves Sieve each particle size fraction di/Diobtained from 7.1 on the corresponding bar sieve gi

41、ven in Table 1. This sieving operation can be carried out manually or mechanically and shall ensure complete separation. Weigh the material from each particle size fraction passing through the corresponding bar sieve. 8 Calculation and expression of results The results shall be recorded on test data

42、 sheets (see example in Annex A). Calculate the sum of the masses of the particle size fractions di/Diand record as M1. Calculate the sum of the masses of the particles in each of the particle size fractions di/Diwhich pass through a corresponding bar sieve of slot width Di/2 and record as M2. The o

43、verall flakiness index FI is calculated from the following equation: FI = (M2/M1) 100 (1) where M1 is the sum of the masses of the particles in each of the particle size fraction di/Di, in grams; M2 is the sum of the masses of the particles in each particle size fraction passing the corresponding ba

44、r sieve of slot width Di/2 in grams. The overall flakiness (FI) shall be recorded to the nearest whole number. DIN EN 933-3:2012-04 EN 933-3:2012 (E) 9 The flakiness index for each particle size fraction FIishall be calculated, if required, from the following equation: FIi= (mi/Ri) 100 (2) where Ri

45、is the mass of each particle size fraction di/Di, in grams; mi is the mass of the material in each particle size fraction di/Diwhich passes through the corresponding bar sieve of slot width Di/2, in grams. If the sum of the masses Ritogether with the masses of any discarded particles and any size fr

46、actions that are not tested (see 7.1) differs by more than 1 % from the mass M0(see Clause 6), the test shall be repeated, using another test portion. 9 Test report 9.1 Mandatory data The test report shall include the following information: a) reference to this European Standard; b) identification o

47、f the sample; c) identification of the laboratory; d) mass of test portion; e) overall flakiness index FI to the nearest whole number; f) sample reception date. 9.2 Optional data The test report may include the following information: a) name and location of the sample source; b) description of the m

48、aterial and of the sampling procedure; c) flakiness index FIiof each particle size fraction to the nearest whole number; d) sampling certificate; e) date of test. DIN EN 933-3:2012-04 EN 933-3:2012 (E) 10 Annex A (informative) Example of test data sheet Flakiness Index Laboratory: EN 933-3 Identification of the sample: Date of reception: Operator:Test portion mass M0= g Mass