BS EN 196-6-2010 Methods of testing cement - Determination of fineness《水泥试验方法 细度测定》.pdf

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1、g5g9g3g32g12g3g33g34g30g4g30g31g35g36g33g36g5g6g7g3g8g9g10g9g11g11g10g9g11g12g13g3g6g13g14g15g5g12g16g3g17g5g18g19g13g20g18g3g21g7g5g3g14g22g23g24g5g7g7g5g13g12g3g22g25g6g22g14g18g3g26g7g3g14g22g23g24g5g18g18g22g27g3g21g15g3g6g13g14g15g23g5g16g19g18g3g28g26g17g5g6g7g8g7g9g10g3g9g8g11g12g13g11g6g13g1

2、4g15g16g17g18g19g20g3g18g21g3g16g15g20g16g22g23g24g25g15g26g15g23g16g27g28g29g16g3g30g31g3g13g15g16g15g29g26g22g23g28g16g22g18g23g3g18g21g3g21g22g23g15g23g15g20g20g5g6g7g8g3g9g10g7g11g7g8g6g3g12g11g13g14g15g13g10g15g3g35g13g8g3g20g34g44g21g7g8g6g16g15g3g34g14g15g16g10g3g11g6g16g3g13g34g11g6g22g10g7g

3、11g46g3g22g23g3g11g6g16g3g12g11g13g14g15g13g10g15g8g3g48g22g21g7g36g46g3g13g14g15g3g12g11g10g13g11g16g42g46g3g37g22g19g19g7g11g11g16g16g3g22g14g3g49g31g3g41g20g10g7g21g3g30g31g26g31g32g51g3g9g12g33g3g30g31g26g31g39g6g5g8g3g10g40g41g3g14g3g42g41g14g3g11g13g13g43g41g3g14g37g27g23g19g25g27g23g19g16g31g

4、38g29g18g22g22g17g34g23g19g25g15g3g17g31g31g32g23g25g3g31g17g19g29g23g3g28g32g35g20g17g29g15g16g17g18g19g50g13g11g16g3 g37g22g19g19g16g14g11g8g5g6g3g7g8g3g9g10g11g4g11g12g13g14g9g14g8g15g16g17g18g19g15g20g3g21g18g22g23g24g18g22g25This British Standard is the UK implementation of EN 196-6:2010. Itsup

5、ersedes BS EN 196-6:1992 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/516, Cement and lime.A list of organizations represented on this committee can be obtained onrequest to its secretary.The European Standard specifies the use of a reference mater

6、ial of known sieve residue for checking the sieve in the sieving method (clause 3). National Annex NA gives a suitable reference material for the UK.The European Standard furthermore specifies the use of a reference cement of known specific surface for the determination of the apparatus constant in

7、the air permeability method (Blaine method) (clause 4). National Annex NB describes a procedure previously given in BS 4550 for measuring the absolute specific surface of a possible, future reference cement, ideally sourced within Europe, for use with this European Standard.The European Standard inc

8、ludes in 4.5.3 only the principle of the method of determination of density which is required for the air permeability methods. National Annex NC therefore describes in full a procedure for determining the density of cement.National Annex ND indicates UK preferred methods for the reporting of the re

9、sults.National Annex NE gives details of corresponding British Standards forInternational Standards referred to in the European Standard.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application. g26g18g27g28g20g17g15g19

10、g29g23g3g24g17g16g30g3g15g3g5g22g17g16g17g31g30g3g6g16g15g19g25g15g22g25g3g29g15g19g19g18g16g3g29g18g19g21g23g22g3g17g27g27g32g19g17g16g33g21g22g18g27g3g20g23g34g15g20g3g18g35g20g17g34g15g16g17g18g19g31g36BS EN 196-6:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 196-6 January 2010 ICS 91.

11、100.10 Supersedes EN 196-6:1989English Version Methods of testing cement - Part 6: Determination of fineness Mthodes dessai des ciments - Partie 6: Dtermination de la finesse Prfverfahren fr Zement - Teil 6: Bestimmung der Mahlfeinheit This European Standard was approved by CEN on 21 December 2009.

12、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 a

13、pplication to the CEN 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 Management Cent

14、re 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norw

15、ay, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form

16、and by any means reserved worldwide for CEN national Members. Ref. No. EN 196-6:2010: EBS EN 196-6:2010EN 196-6:2010 (E) 2 Contents Page Foreword 3g31g3 Scope 5g32g3 Normative references 5g33g3 Sieving method 5g33.1g3 Principle 5g33.2g3 Apparatus .5g33.3g3 Material for checking the sieve 6g33.4g3 Pr

17、ocedure .6g33.5g3 Expression of results 7g34g3 Air permeability method (Blaine method) .7g34.1g3 Principle 7g34.2g3 Apparatus .7g34.3g3 Materials 10g34.4g3 Test conditions . 10g34.5g3 Compacted cement bed . 10g34.6g3 Air permeability test . 11g34.7g3 Calibration of apparatus 12g34.8g3 Special cement

18、s 14g34.9g3 Simplification of the calculations 15g34.10g3 Expression of results . 16g35g3 Air-jet sieving method 16g35.1g3 Principle . 16g35.2g3 Apparatus 17g35.3g3 Procedure 18g35.4g3 Checking the sieve . 18g35.5g3 Expression of results . 18g35.6g3 Repeatability and reproducibility 18g3BS EN 196-6:

19、2010EN 196-6:2010 (E) 3 Foreword This document (EN 196-6:2010) has been prepared by Technical Committee CEN/TC 51 “Cement and building limes”, the secretariat of which is held by NBN. This European Standard shall be given the status of a national standard, either by publication of an identical text

20、or by endorsement, at the latest by July 2010, and conflicting national standards shall be withdrawn at the latest by July 2010. 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

21、identifying any or all such patent rights. This document supersedes EN 196-6:1989. EN 196, Methods of testing cement, consists of the following parts: Part 1: Determination of strength Part 2: Chemical analysis of cement Part 3: Determination of setting times and soundness Part 5: Pozzolanicity test

22、 for pozzolanic cement Part 6: Determination of fineness Part 7: Methods of taking and preparing samples of cement Part 8: Heat of hydration Solution method Part 9: Heat of hydration Semi-adiabatic method Part 10: Determination of the water-soluble chromium (VI) content of cement NOTE A previous par

23、t, EN 196-21, Methods of testing cement Determination of the chloride, carbon dioxide and alkali content of cement, has been revised and incorporated into EN 196-2. Another document, ENV 196-4, Methods of testing cement Quantitative determination of constituents, has been published as CEN/TR 196-4,

24、Methods of testing cement Part 4: Quantitative determination of constituents. This edition introduces the following technical changes based on comments received by the Secretariat: a) A method to determine the residue on sieving by air-jet equipment is included; b) The method for calibration of the

25、air permeability equipment has been clarified and an alternative method, avoiding the use of mercury, added; c) The factors used in the air permeability (Blaine) method have been corrected for errors introduced in the conversion to SI units. According to the CEN/CENELEC Internal Regulations, the nat

26、ional standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech BS EN 196-6:2010EN 196-6:2010 (E) 4 Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithu

27、ania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 196-6:2010EN 196-6:2010 (E) 5 1 Scope This European Standard describes three methods of determining the fineness of cement. The sieving method serves

28、only to demonstrate the presence of coarse cement particles. This method is primarily suited to checking and controlling the production process. The air-jet sieving method measures the retention on sieving and is suitable for particles which substantially pass a 2,0 mm test sieve. It may be used to

29、determine the particle size distribution of agglomerates of very fine particles. This method may be used with test sieves in a range of aperture sizes, e.g. 63 m and 90 m. The air permeability method (Blaine) measures the specific surface (mass related surface) by comparison with a reference cement

30、sample. The determination of the specific surface serves primarily to check the consistency of the grinding process of one and the same plant. This method only enables a limited assessment to be made of the properties of the cement in use. NOTE The air permeability method may not give significant re

31、sults for cements containing ultrafine materials. The methods are applicable to all the cements defined in EN 197. 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 refer

32、ences, the latest edition of the referenced document (including any amendments) applies. EN 197-1, Cement g650 Part 1: Composition, specifications and conformity criteria for common cements ISO 383:1976, Laboratory glassware g650 Interchangeable conical ground joints ISO 565, Test sieves g650 Metal

33、wire cloth, perforated metal plate and electroformed sheet g650 Nominal sizes of openings ISO 3310-1, Test sieves g650 Technical requirements and testing g650 Part 1: Test sieves of metal wire cloth ISO 4803, Laboratory glassware g650 Borosilicate glass tubing 3 Sieving method 3.1 Principle The fine

34、ness of cement is measured by sieving it on standard sieves. The proportion of cement of which the grain sizes are larger than the specified mesh size is thus determined. A reference sample having a known proportion of material coarser than the specified mesh size is used for checking the specified

35、sieve. 3.2 Apparatus 3.2.1 Test sieve, comprising a firm, durable, non-corrodible, cylindrical frame of 150 mm to 200 mm nominal diameter and 40 mm to 100 mm depth, fitted with, e.g. 90 g151m, mesh sieve cloth of woven stainless steel, or other abrasion-resisting and non-corrodible metal wire. BS EN

36、 196-6:2010EN 196-6:2010 (E) 6 The sieve cloth shall conform to the requirements of ISO 565 and ISO 3310-1 and shall be free of visible irregularities in mesh size when inspected optically by the methods of ISO 3310-1. A tray fitting beneath the sieve frame and a lid fitting above it shall be provid

37、ed to avoid loss of material during sieving. NOTE Sieving may be carried out manually or on a sieving machine. 3.2.2 Balance, capable of weighing up to 25 g to the nearest 0,01 g. 3.3 Material for checking the sieve A reference material of known sieve residue shall be provided for checking the sieve

38、. The material shall be stored in sealed, airtight containers to avoid changes in its characteristics due to absorption or deposition from the atmosphere. The containers shall be marked with the sieve residue of the reference material. 3.4 Procedure 3.4.1 Determination of the cement residue Agitate

39、the sample of cement to be tested by shaking for 2 min in a stoppered jar to disperse agglomerates. Wait 2 min. Stir the resulting powder gently using a clean dry rod to distribute the fines throughout the cement. Fit the tray under the sieve. Weigh (25 0,5) g of cement to the nearest 0,01 g and pla

40、ce it in the sieve, being careful to avoid loss. Disperse any agglomerates. Fit the lid over the sieve. Agitate the sieve by swirling, planetary and linear movements until no more fine material passes through it. Remove and weigh the residue. Express its mass as a percentage, R1of the quantity first

41、 placed in the sieve to the nearest 0,1 %. Gently brush all the fine material off the base of the sieve into the tray. Repeat the whole procedure using a fresh 25 g sample to obtain R2. Then calculate the residue of the cement R as the mean of R1and R2as a percentage, expressed to the nearest 0,1 %.

42、 When the results differ by more than 1 % absolute, repeat the whole procedure a third time and calculate the mean of the three values. Sieving by the manual process requires a skilled and experienced operator. 3.4.2 Checking the sieve Sieves should be cleaned and checked for damage after each sievi

43、ng (e.g. that the mesh is taut and is not dented or perforated). In addition, check the sieve after every 100 sievings as follows: Agitate the sample of reference material, to be used for checking the sieve, by shaking for 2 min in a stoppered jar to disperse agglomerates. Wait 2 min. Stir the resul

44、ting powder gently using a clean dry rod to distribute the fines throughout the reference material. Fit the tray under the sieve. Weigh (25 0,5) g of the reference material (3.3) to the nearest 0,01 g and place it in the sieve, being careful to avoid loss. Sieve the material in accordance with 3.4.1

45、 including the repeat determination of residue to yield two values P1and P2expressed to the nearest 0,1 %. The two values of P1 and P2 for a satisfactory sieve should differ by not more than 0,6 %. Their mean P characterizes the state of the sieve. Given the known residue on the sieve of the referen

46、ce material, R0, calculate R0IP as the sieve factor, F, expressed to the nearest 0,01. The residue, R, determined as in 3.4.1 shall be corrected by multiplying by F, which may have a value of 1,00 0,20. BS EN 196-6:2010EN 196-6:2010 (E) 7 When the factor F exceeds the permitted value, 1,00 0,20, the

47、 sieve shall be discarded. NOTE Any other checking procedure, such as the optical methods described in ISO 3310-1 may be used. All sieves will wear slowly and consequently their sieve factor, F, will slowly change. 3.5 Expression of results Report the value of R to the nearest 0,1 %, as the residue,

48、 the sieve mesh size and details of the cement tested. The standard deviation of the repeatability is about 0,2 % and of the reproducibility is about 0,3 %. NOTE Where there is local difficulty in obtaining ISO standard sieves, the same procedure can be followed with the nearest available standard s

49、ieve but the report should state on which standard sieve mesh the cement residue has been determined. 4 Air permeability method (Blaine method) 4.1 Principle The fineness of cement is measured as specific surface by observing the time taken for a fixed quantity of air to flow through a compacted cement bed of specified dimensions and porosity. Under standardized conditions the specific surface of cement is proportional to g165t where t is the time for a given quantity of air to flow through the compacted cement bed. The number a