1、BRITISH STANDARD BS EN 933-5:1998 Incorporating Amendment No. 1 and Corrigendum No. 1 Tests for geometrical properties of aggregates Part 5: Determination of percentage of crushed and broken surfaces in coarse aggregate particles The European Standard EN 933-5:1998, with the incorporation of amendme
2、nt A1:2004, has the status of a British Standard ICS 91.100.15 BS 5446-3:2005 This British Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 May 1998 BSI 11 M
3、ay 2005 ISBN 0 580 29768 3 National foreword This British Standard is the official English language version of EN-933-5:1998, including amendment A1:2004 and corrigendum May 2005. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags indicating cha
4、nges to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“. The UK participation in its preparation was entrusted by Technical Committee B/502, Aggregates, to Subcommittee B/502/6, Test methods, which has the responsibility to: A list of
5、organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards
6、 Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard doe
7、s not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European devel
8、opments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inisde front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments is
9、sued since publication Amd. No. Date Comments 15524 6 April 2005 See national foreword 15664 Corrigendum No. 1 11 May 2005 Errors omitted from previous amendment to Scope, subclauses 3.9, 5.4, 8.2.1 and Annex A EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 933-5 January 1998 + A1 November 200
10、4 ICS 91.100.15 Descriptors: Aggregates, tests, geometric, characteristics, determination, area, fractures, materials, settings, rates per unit time, gravel, computation English version Tests for gometrical properties of aggregates Part 5: Determination of percentage of crushed and broken surfaces i
11、n coarse aggregate particles (includes amendment A1:2004) Essais pour dterminer les caractristiques gomtriques des granulats Partie 5: Dtermination du pourcentage de surfaces casses dans les gravillons (inclut lamendement A1:2004) Prfverfahren fr geometrische Eigenschaften von Gesteinskmungen Teil 5
12、: Bestimmung des Anteils an gebrochenen Kmern in groben Gesteinskmungen (enthlt nderung A1:2004) This European Standard was approved by CEN on 26 December 1997; amendment A1 was approved by CEN on 16 September 2004. CEN members are bound to comply with the CEN/CENELEC International Regulations which
13、 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 Central Secretariat or to any CEN member. This European Stand
14、ard 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 Central Secretariat has the same status as the official versions. CEN members are the national elect
15、rotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. CE
16、N European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Mambers. Ref. No. EN 933-5:1998 + A1:20
17、04 EEN 933-5:1998 BSI 11 May 2005 2 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 endo
18、rsement, at the latest by July 1998, and conflicting national standards shall be withdrawn at the latest by December 1999. 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
19、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. A European Standard Tests f
20、or filter aggregate used in bituminous mixtures is in preparation. 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 shap
21、e Flakiness index. Part 4. Determination of particle shape Shape index. Part 6, Assessment of surface characteristics Flow coefficient for course aggregates. Part 7, Determination of shell content Percentage of shells in course aggregates. Part 8, Assessment of fines Sand equivalent test. Part 9, As
22、sessment of fines Methylene blue test. Part 10, Assessment of fines Grading of fillers (air jet sieving). 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
23、, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A1 This document (EN 933-5:1998/A1:2004) has been prepared by Technical Committee CEN/TC 154, Aggregates, the Secr
24、etariat of which is held by BSI. This amendment to the European Standard EN 933-5:1998 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May
25、 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germnay, Greece, Hungary, Iceland, Ireland, Italy, Lat
26、via, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword 2 1S c o p e 3 2 Normative references 3 3 Definitions 3 4P r i n c i p l e 4 5 Apparatus 4 6 Preparation of test portion 4 7 Procedure 5
27、 8 Calculation and expression of results 6 9 Test report 7 Annex A (informative) Example of a test data sheet 8EN 933-5:1998 BSI 11 May 2005 3 1 Scope This European Standard specifies a method for the determination of the percentage of particles with crushed and broken surfaces in a sample of natura
28、l coarse aggregate. It applies to gravel or mixed aggregate containing gravel. The test method specified in this part of this European Standard is applicable to particle size fractions d i /D iwhere D ik 63 mm and d iU 4 mm. !NOTE 1 For aggregate sizes with D 63 mm and/or d 4 mm the test may be carr
29、ied out on particle size fractions d i /D iwhere D ik 63 mm and d iU 4 mm. NOTE 2 For coarse aggregate between 4 mm and 20 mm the percentage of crushed or broken surfaces is linked to the flow coefficient and can therefore be used in association with the test method specified in EN 933-6. “ 2 Normat
30、ive 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 a
31、ny 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. prEN 932-2, Tests for general properties of aggregates Part 2: Methods for reducing laboratory samples. p
32、rEN 932-5, Tests for general 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
33、of particle size distribution Test sieves, nominal size of apertures. 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 aggregate size a designation of aggregate in terms of lower (d) and upper (D) sieve sizes NOTE This designation accepts the presence of some par
34、ticles which will be retained on the upper sieve (oversize) and some which will pass the lower sieve (undersize). 3.2 particle size fraction d i /D i fraction of an aggregate passing the larger (D i ) of two sieves and retained on the smaller (d i ) 3.3 test portion the sample used as a whole in a s
35、ingle test 3.4 constant mass successive weightings 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 t
36、ime required to achieve constant mass for specific types and sizes of sample dependent upon the drying capacity of the oven used. 3.5 totally crushed or broken particle particle with more than 90 % of its surface crushed or broken (tc) 3.6 crushed or broken particle particle with more than 50 % of i
37、ts surface crushed or broken (c)EN 933-5:1998 4 BSI 11 May 2005 3.7 rounded particle particle with 50 % or less of its surface crushed or broken (r) 3.8 totally rounded particle particle with more than 90 % of its surface rounded (tr) 3.9 crushed or broken surfaces facets of a particle of gravel pro
38、duced by crushing or broken by natural forces and bounded by sharp edges. !If both the surface and the edges of a particle of crushed or broken gravel are worn or weathered then it shall be considered as rounded for the purposes of this test method. “ 4 Principle The test consists of sorting particl
39、es by hand, from a test portion of coarse aggregates into: crushed or broken particles, including totally crushed or broken particles; rounded particles, including totally rounded particles. The mass of each of these groups is determined and expressed as a percentage of the test portion mass. Totall
40、y crushed or broken particles and totally rounded particles are then sorted by hand from crushed or broken particles and rounded particles and the mass of these groups is determined and expressed as a percentage of the test portion mass. 5 Apparatus Unless otherwise stated, all apparatus shall confo
41、rm to the general requirements of prEN 932-5. 5.1 Test sieves, of nominal size of apertures conforming with EN 933-2. 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 equipment for drying the aggregate which d
42、oes not cause any particle size breakdown. 5.4 Balance or scale, of suitable capacity, readable to 0,1 % of the mass to be weighed. 5.5 Trays. 5.6 Brushes. 5.7 Sieving machine, optional. 6 Preparation of test portion The sample shall be reduced in accordance with the requirements of prEN 932-2. Dry
43、the sample at (110 5) C to constant mass, Weigh and record the mass as M o . Sieve on appropriate test sieves agitating with sufficient vigour to ensure complete separation of particles greater than 4 mm. Discard the particles retained on the 63 mm test sieve and those passing the 4 mm test sieve. I
44、f necessary further reduce the sample in accordance with prEN 932-2 to produce a test portion. Record the mass of the test portion as M 1 . The mass of the test portion shall be as specified in Table 1.EN 933-5:1998 BSI 11 May 2005 5 Table 1 Mass of test portions NOTE For other aggregate sizes D, ap
45、propriate test portion masses may be interpolated from those given in Table 1. Sample reduction shall yield a test portion of mass larger than the minimum but not of an exact predetermined value. Carry out the test on each particle size fraction d i /D iwhere D ik 2d i . Samples for which D 2d shall
46、 first be separated into particle size fraction d i /D iwhere D ik 2d i . 7 Procedure 7.1 Test portion where D k 2d Spread the particles of the test portion on a flat surface and separate the particles by hand into the following two groups: crushed or broken particles (c) including the totally crush
47、ed or broken particles (tc); rounded particles (r) including the totally rounded particles (tr). Weigh each group and record the masses as M cand M r . Spread the crushed or broken particles (c) on a flat surface and separate by hand the totally crushed or broken particles (tc) from the others. Weig
48、h the totally crushed or broken particles (tc) and record the mass as M tc . Spread the rounded particles (r) on a flat surface and separate by hand the totally rounded particles (tr) from the others. Weigh the totally rounded particles (tr) and record the mass as M tr . 7.2 Test portions where D 2d
49、 Separate the test portion into particle size fractions d i /D iwhere D ik 2d iby sieving in accordance with EN 933-1. Record the mass of each particle size fraction as M iand calculate and record the percentage by mass of each particle size fraction d i /D ito the test portion mass M 1as V i . Discard any size fraction d i /D iwhich comprises less than 10 % of M 1 . NOTE 1 Remaining size fraction d i /D iwhic
