SANS 50196-7-2009 Methods of testing cement Part 7 Methods of taking and preparing samples of cement《水泥试验方法 第7部分 水泥试样的采取和准备方法》.pdf

《SANS 50196-7-2009 Methods of testing cement Part 7 Methods of taking and preparing samples of cement《水泥试验方法 第7部分 水泥试样的采取和准备方法》.pdf》由会员分享，可在线阅读，更多相关《SANS 50196-7-2009 Methods of testing cement Part 7 Methods of taking and preparing samples of cement《水泥试验方法 第7部分 水泥试样的采取和准备方法》.pdf（22页珍藏版）》请在麦多课文档分享上搜索。

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22334-2 SANS 50196-7:2009 Edition 2 EN 196-7:2007 Edition 2SOUTH AFRICAN NATIONAL STANDARD Methods of testing cement Part 7: Methods of ta

4、king and preparing samples of cement Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.

5、SANS 50196-7:2009 Edition 2 EN 196-7:2007 Edition 2 Table of changes Change No. Date Scope National foreword This South African Standard was approved by National Committee SABS SC 59A, Construction standards Cement, lime and concrete, in accordance with procedures of the SABS Standards Division, in

6、compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in February 2009. This SANS document supersedes SABS EN 196-7: 1989 (edition 1). SANS 50196 consists of the following parts under the general title Methods of testing cement. Part 1: Determination of strength. Part 2:

7、 Chemical analysis of cement. Part 3: Determination of setting times and soundness. Part 4: Qualitative determination of constituents. Part 5: Pozzolanicity test for pozzolanic cement. Part 6: Determination of fineness. Part 7: Methods of taking and preparing samples of cement. This standard may onl

8、y be used and printed by approved subscription and freemailing clients of the SABS.EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN1967 December2007 ICS91.100.10 SupersedesEN1967:1989 EnglishVersion MethodsoftestingcementPart7:Methodsoftakingand preparingsamplesofcement MthodesdessaidescimentsParti

9、e7:Mthodesde prlvementetdchantillonnageduciment PrfverfahrenfurZementTeil7:Verfahrenfurdie ProbenahmeundProbenauswahlvonZement ThisEuropeanStandardwasapprovedbyCENon24October2007. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropean Standard

10、thestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcerningsuchnational standardsmaybeobtainedonapplicationtotheCENManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytrans

11、lation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCENManagementCentrehasthesamestatusasthe officialversions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Cyprus,CzechRepublic,Denmark,Estonia,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,La

12、tvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Romania,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2007CEN Allrightsofexploi

13、tationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN1967:2007:E SANS 50196-7:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS.EN 196-7:2007 (E) 2 Contents Page Foreword. 3 1 Scope 4 2 Normative references . 4 3 Term

14、s and Definitions 4 4 General. 5 4.1 Purpose 5 4.2 Equipment 5 4.3 Representation 6 5 Sampling equipment. 6 6 Procedures for taking samples . 6 6.1 General. 6 6.2 Sampling from bags, drums and containers of small size . 7 6.3 Sampling from large containers and bulk transport (after loading or before

15、 unloading) 7 6.4 Sampling while loading into bulk transports or silos . 7 6.5 Sampling from silos 7 7 Frequency at which samples are taken and choice of sample type 7 8 Size and preparation of samples. 8 8.1 Size of sample to be taken . 8 8.2 Homogenization 8 8.3 Division of the homogenized sample

16、9 8.4 Foreign materials in the sample 10 9 Packaging and storage. 10 9.1 Principle . 10 9.2 Containers . 10 9.3 Storage condition 11 9.4 Identification of samples 11 9.5 Authentication of samples . 11 10 Sampling report. 11 10.1 General. 11 10.2 Information to be included. 11 10.3 Authorization of t

17、he report. 12 10.4 Dispatch of the report. 12 Annex A (informative) Typical examples of sampling equipment normally used 13 Bibliography . 18 SANS 50196-7:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS.EN 196-7:2007 (E) 3 Foreword This doc

18、ument (EN 196-7:2007) 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 or by endorsement, at the latest by June 2

19、008, and conflicting national standards shall be withdrawn at the latest by June 2008. 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.

20、 This document supersedes EN 196-7:1989. The text in this edition has been edited to take account of developments in European Standards for cement, methods of testing cement and specifications for conformity evaluation. No technical changes have been made to the text of EN 196-7:1989. The main edito

21、rial changes are: a) Brief history has been deleted as it was no longer relevant; b) Object and field of application is now re-titled Scope; c) References not normatively listed within the document have been deleted from clause 2; d) Clause 3.8 reference to certification regulations has been deleted

22、 as this is now covered in EN 197-2 and Annex ZA of EN 197-1:2000; e) Clause 4.2 (previously 4.1) reference to additional equipment has been deleted as it is now covered in EN 197-2 and in guidance document PD CR 14245; f) Reference to responsibility regarding sampling (previously clause 4.3) has be

23、en deleted as it is now covered in EN 197-2 g) Clause 5 restriction to sampling whilst fluidized has been deleted since many modern samplers operate satisfactorily in such circumstances; h) Clause 6 (previously 6.7) reference to sampling from bag filling machines has been deleted as being in conflic

24、t with the requirements in many specifications for only filled bags to be sampled; According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Den

25、mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SANS 50196-7:2009This standard may only be used and printed

26、by approved subscription and freemailing clients of the SABS.EN 196-7:2007 (E) 4 1 Scope This European Standard describes the equipment to be used, the methods to be followed and the provisions for taking samples of cement, representative of given lots for testing, to assess the quality of products

27、prior to, during or after delivery. The provisions of this standard are only applicable when samples of cement are: a) required for evaluating the conformity of a cement at any time with a standard; or b) requested for checking a delivery or a lot with a standard, the provisions of a contract or the

28、 specification in an order. The standard is applicable to the taking of samples of all types of cements defined by European Standards for cements whether they are: c) contained in silos; d) contained in bags, canisters, drums or any other packages; e) transported in bulk in road vehicles, railway wa

29、gons, ships, etc. NOTE The requirements of this standard can also, by agreement between the parties, be followed for acceptance inspections for all non-standardized hydraulic binders. 2 Normative references Not applicable. 3 Terms and Definitions For the purpose of this European Standard, the follow

30、ing terms and definitions apply. 3.1 order quantity of cement covered by a single requisition placed with a single manufacturer, factory, depot or dispatching centre. It may consist of one or more consignments spread over a period of time 3.2 consignment quantity of cement delivered at a given time

31、by a single manufacturer, factory, depot or dispatching centre. It may consist of one or more lots 3.3 lot quantity of cement produced under conditions presumed uniform NOTE After specified tests this quantity is regarded as a whole as meeting or not meeting a standard, the provisions of a contract

32、or the specification in an order. 3.4 increment quantity of cement taken in a single operation of the sampling equipment used SANS 50196-7:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS.EN 196-7:2007 (E) 5 3.5 sample quantity of cement tak

33、en at random, or in accordance with a sampling plan, from a larger quantity (silo, stock of bags, wagons, trucks, etc.) or from a fixed lot, relating to the intended tests. A sample may consist of one or more increments 3.6 spot sample sample taken within a short period of time and at a fixed point

34、from within a larger quantity, relating to the intended tests. It can be obtained by combining one or more immediately consecutive increments 3.7 composite sample homogeneous mixture of spot samples taken: a) at different points; or b) at different times; from a larger mass of the same cement, obtai

35、ned by thoroughly mixing the combined spot samples and, if necessary, reducing the size of the resulting mixture 3.8 laboratory sample sample prepared by thoroughly mixing and if necessary reducing from a larger sample (spot or composite sample) and intended for use by laboratories undertaking the t

36、ests 3.9 sample for retest sample which is to be kept for possible subsequent tests in the event of the results from tests carried out on laboratory samples being in doubt or disputed 3.10 retained sample sample taken systematically from regular deliveries (for example for large works), if necessary

37、 in the presence of all the parties concerned, to be retained for possible testing in the event of doubt or dispute or subsequent problems NOTE Definitions 3.1, 3.2, 3.3 and 3.10 only have meaning in the case of checks made when taking delivery of a supply. 4 General 4.1 Purpose The purpose of the s

38、ampling operations is to obtain from a large quantity of cement (contained in a silo, a stock of bags in a warehouse, truck, etc., or in a defined lot), one or more smaller quantities, considered by the parties concerned to represent the quantity of cement of which the quality is to be assessed. 4.2

39、 Equipment The equipment used, methods followed, and precautions taken may vary according to the nature of the installation and the circumstances in which the samples are taken. SANS 50196-7:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS.E

40、N 196-7:2007 (E) 6 4.3 Representation In the case of taking delivery of supply, sampling should take place in the presence of representatives of the manufacturer (or vendor) and the customer (or purchaser). The absence of one of them should not, however, be a barrier to sampling but if this occurs i

41、t should be recorded in the sampling report (see clause 10). The sample is normally taken before or during discharge or unloading. However, if necessary, it may be taken after discharge or unloading but with a maximum delay of 24 h. In this latter case the results of the checks shall be interpreted

42、with care. NOTE For various reasons, the cement to be tested may no longer be representative of the product at the time of its discharge or unloading, when a delay in sampling occurs. In all cases, the time of sampling shall be recorded in the sampling report (see clause 10). When samples are taken

43、after discharge or unloading, the recommendations in the first paragraph above remain applicable. 5 Sampling equipment Industrial installations and the circumstances in which samples have to be taken are many and diverse. Consequently, it is not possible to specify a single type of reference equipme

44、nt against which other types can be validated. Hence, this standard only gives, by way of example in Annex A, a simplified illustration of the devices normally used and which have been found to be satisfactory. This equipment is either portable (ladle, tube, screw sampler, etc.) or permanently insta

45、lled (screw extractor or other equipment fixed permanently onto the container). The equipment shall be chosen and used in accordance with the following requirements. The equipment shall be: a) approved by all the parties; b) of non-corrodible material, which is not liable to react with the cement; c

46、) maintained always in working order and in a clean state. Care shall be taken to ensure that it is carefully cleaned after each sampling operation (see Note). Care shall also be taken to ensure that it is not contaminated by lubricants from other equipment used. NOTE However, cleaning is not necess

47、ary between taking successive increments from the same cement which are intended for making up the sample. 6 Procedures for taking samples 6.1 General The most suitable equipment for the circumstances shall be used to take a sample, observing the following precautions as appropriate. SANS 50196-7:20

48、09This standard may only be used and printed by approved subscription and freemailing clients of the SABS.EN 196-7:2007 (E) 7 6.2 Sampling from bags, drums and containers of small size When the cement is packed in bags, drums or other small containers, the sample shall comprise one or more bags, dru

49、ms or containers chosen at random from a sufficiently large stock in order to meet the requirements of the second paragraph of 8.1. 6.3 Sampling from large containers and bulk transport (after loading or before unloading) For all equipment used, care shall be taken not to take material from the top or bottom layers of the mas