FINAL DRAFT UGAND A 
STANDARD  
  FDUS EAS 148-7 
First  Edition  
2018-mm-dd 
 
 Reference number  
FDUS EAS 148-7: 2017 
© UNBS 201 8 
  
Cement — Test methods — Part 7: Methods of taking and 
preparing samples  
 FDUS EAS 148 -7:2017 
ii                © UNBS  2018  - All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2018  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 7 333 2 50/1/2 
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  
 FDUS EAS 148 -7:2018 
© UNBS  2018  - All rights reserved                 iii National foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and 
Cooperatives established under Cap 327, of the Laws of Uganda, as amended.  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the Nation al Enquiry Point on TBT Agreement of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consis ts of representatives of 
consumers, traders, academicians, manufacturers, government and other stakeholders.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
This Uganda Standard, US EAS 148 -7: 2017, Cement — Test methods — Part 7: : Methods of taking and 
preparing sam ples, is identical with and has been reproduced from an East African Standard, EAS 148 -7: 
2017 , Cement — Test methods — Part 7: : Methods of taking and preparing samples , and adopted as a 
Uganda Standard.  
The committee responsible for this document is Tec hnical Committee UNBS/TC 3, Building and construction .  
This standard cancels and replaces US 100 -7:2016, Cement — Test methods — Part 7: Methods of taking 
and preparing samples (2nd Edition) , which has been technically revised.  
.) 
  EAS 148-7: 201 7 
ICS 91.100.10  
© EAS 2017                                                                                                                          Second  Edition 2017  
 
EAST AFRICAN STANDARD  
Cement  — Test methods  — Part 7: Methods of taking and preparing 
samples  
EAST AFRICAN COMMUNITY  
 
 
 
 
 
 
 
  
   
 EAS 148-7: 201 7 
ii © EAC  2017– All rights reserved  
 Copyright notice  
This EAC document is copyright -protected by EAC. While the reproduction of this document by 
participants in the EAC standards develo pment process is permitted without prior permission from EAC, 
neither this document nor any extract from it may be reproduced, stored or transmitted in any form for 
any other purpose without prior written permission from EAC.  
Requests for permission to rep roduce this document for the purpose of selling it should be addressed 
as shown below or to EAC’s member body in the country of the requester:  
© East African Community  2017 — All rights reserved  
East African Community  
P.O.Box 1096  
Arusha  
Tanzania  
Tel: 255 27 2504253/8  
Fax: 255 27 2504481/2504255  
E-mail: eac@eachq.org  
       Web: www.eac -quality.net  
Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.  
Violators may be persecuted  EAS 148-7: 201 7 
© EAC 2017 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 General  ................................ ................................ ................................ ................................ ...................  3 
4.1 Purpose  ................................ ................................ ................................ ................................ ..................  3 
4.2 Equipment  ................................ ................................ ................................ ................................ ..............  3 
4.3 Representation  ................................ ................................ ................................ ................................ ...... 3 
5 Sampling equipment  ................................ ................................ ................................ .............................  3 
6.1 General  ................................ ................................ ................................ ................................ ...................  3 
6.2 Sampling from bags, drums and containers of small size ................................ ................................  4 
6.4 Sampling while loading into bulk transports or silos  ................................ ................................ ........  4 
6.5 Sampling from silos  ................................ ................................ ................................ ................................ ..... 4 
7 Frequency at which sample are taken and choice of sample type  ................................ ..................  4 
8 Size and preparation of samples  ................................ ................................ ................................ .........  4 
8.1 Size of sample to be taken  ................................ ................................ ................................ ...................  4 
8.2 Homogenisation  ................................ ................................ ................................ ................................ .... 5 
8.3 Division of the homogenised sample  ................................ ................................ ................................ .. 5 
8.4 Foreign materials in the sample  ................................ ................................ ................................ ..........  6 
9 Packaging and storage  ................................ ................................ ................................ .........................  7 
9.1 Principle  ................................ ................................ ................................ ................................ .................  7 
9.2 Containers  ................................ ................................ ................................ ................................ ..............  7 
9.3 Storage condition  ................................ ................................ ................................ ................................ .. 7 
9.4 Identification of samples  ................................ ................................ ................................ ......................  7 
9.5 Authentication of samples  ................................ ................................ ................................ ...................  7 
10 Sampling report  ................................ ................................ ................................ ................................ ..... 8 
10.1  General  ................................ ................................ ................................ ................................ ...................  8 
10.2  Information to be included  ................................ ................................ ................................ ...................  8 
10.3  Authorization of the report  ................................ ................................ ................................ ...................  8 
10.4  Dispatch of the report  ................................ ................................ ................................ ...........................  8 
 EAS 148-7: 201 7 
iv © EAC  2017– All rights reserved  
 Foreword  
Development of the East African Standards has been necessitated b y the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and services are exchanged 
within the Community will be removed.  
In order to achieve this objective, the Community established an East African Standards Committee mandated 
to develop and issue East African Standards.   
The Committee is composed of representatives of the National Standards Bodi es in Partner States, together 
with the representatives from the private sectors and consumer organizations. Draft East African Standards 
are circulated to stakeholders through the National Standards Bodies in the Partner States. The comments 
received are discussed and incorporated before finalization of standards, in accordance with the procedures 
of the Community.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are therefore expec ted to ensure that they always have the latest versions of the standards 
they are implementing .  
EAS 148-7 was prepared by Technical Committee EASC/TC/026, Cement, lime, clay and related products.  
In the preparation of this East African Standard, reference  was made to the following standard:  
EN 196 -7: 2005; Methods testing cement - Part 7: Method of taking and preparing samples of cement.  
The assistance derived from the above source is hereby acknowledged with thanks.  
This second edition cancels and replace s the first edition (EAS 148-7:2000), which has been technically 
revised.  
EAS148 consists of the following parts, under the general title Cement  — Test methods : 
Part 1: Determination of strength  
Part 2: Chemical analysis of cement  
Part 3: Determination of setting times and soundness  
Part 4: Quantitative Determination of constituents  
Part 5: Pozzolanicity test for pozzolanic cement  
Part 6: Determination  of fineness  
Part 7: Method of taking and preparing samples of cement  
Part 8: Heat of hydration – Solution method  
 EAST AFRICAN STANDARD  EAS 148-7: 201 6 
 
© EAC 2017 – All rights reserved  1 
 Cement — Test methods — Part 7: Methods of taking and 
preparing samples  
1 Scope  
This East African Standard describes the equipment to be used, the methods to be followed and the 
provisions to be comp lied with for taking samples of cement representative of given lots for testing to assess 
the quality of products prior to, during or after delivery.  
The provisions of this standard are only ap plicable when samples of cement are requested for verifying the 
compliance of either:  
a) current production of a cement at any time with a standard (for example to meet the needs of the 
manufacturer's auto -control or again in response to the requirements of a certification procedure); or  
b) a delivery or a lot with a standard, the provisions of a contract or the specification in an order.  
c) The standard is applicable to the taking of samples of all types of cements defined by FDEAS 18 -1 
whether they are :  
i. contained in silos;  
ii. contained in bags, canisters, drums or any other packages;  
iii. transported in bulk in, road vehicles, railway wagons, ships . 
2 Normative references  
The following referenced documents are indispensable for the application of this docume nt. For dated 
references, only the edition cited applies. For undated references, the latest edition of the referenced 
document (including any amendments) applies.  
EAS 18 -1; Cement — Part 1: Composition, specifications and conformity criteria  
EAS 148 -6; Cement — Test methods  — Part 6:  Determination of fineness  
3 Terms and definitions  
For the purposes of this standard , the following terms and definitions shall  
3.1 
order  
quantity of cement covered by a single requisition placed with the same manufacturer, fa ctory, depot, or 
dispatching centre.  It may consist of one or more consignments spread over a period of time  EAS 148-7: 201 7 
2 © EAC  2017– All rights reserved  
 3.2 
consignment  
quantity of cement delivered at a given time by a manufacturer, factory, depot, or dispatching centre . It may 
consist of one or m ore lots.  
3.3 
lot  
quantity of cement produced un der conditions presumed uniform  
NOTE  After specified tests, this quantity is regarded as a whole ‘complying’ or 'not complying' with standards or 
contract requirements.  
3.4 
increment  
quantity of cement take n in a single operation  of the sampling equipment used  
3.5 
sample  
quantity of cement taken 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 t ests. A sample may consist of one or 
more increments.  
3.6 
spot sample  
sample taken at the same time and from one and the same place, relating to the intended tests. It can be 
obtained by combining one or more immediately consecutive increments  
3.7 
compos ite sample  
homogeneous mixture of spot samples taken:  
a) at different points, or  
b) at different times from a larger mass of the same cement, obtained by thoroughly mixing the combined 
spot samples and, if necessary, reducing the size of the resulting mi xture.  
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 the laboratories undertaking the tests.  
3.9 
sample for retest  
sample, which is to be kep t for possible subsequent tests in the event of the results from tests, carried out on 
the laboratory samples being in doubt or disputed.  
3.10 
retained sample  
sample taken systematically from regular deliveries (for example, for large works), if necessary  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 
supp ly. EAS 148-7: 201 7 
© EAC 2017 – All rights reserved  3 
 4 General  
4.1 Purpose  
The purpose of the sampling operations is to obtain from a large quantity of cement (contained in a silo, a 
stock of bags in a warehouse, truck, or in a defined lot) one or more smaller quantities, considered by the 
parties concer ned to represent the quantity of cement of which the quality is to be assessed . 
4.2 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 ta ken. 
4.3 Representation  
4.3.1  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 (purchaser). The absence of one of them should not, 
however, be a barrier  to sampling but if this occurs it should be recorded in the sampling report (see clause 
10). 
4.3.2  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 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 sampl ing occurs. In all cases, the time of sampling shall be recorded in the 
sampling report (see clause 10). When samples are taken after discharge or unloading, the recommendations in 4.3.1 
remain applicable.  
5 Sampling equipment  
Industrial installations and circumstances in which samples are to be taken are many and diverse. 
Consequently, it is not possible to specify a single type of reference equipment 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 installed (screw extractor or other equipment fixed permanently 
onto t he container.  
The chosen equipment shall be:  
a) approved by all the parties;  
b) of non -corrodible material, which is not liable to react with the cement;  
c) 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. Care shall be taken to ensure that it is not 
contaminated by lubricants from other equipments used.  
NOTE  However, cleaning is not necessary between taking successive increments from the same cement which are 
intended  for making up the sample.  
6 Procedure for taki ng samples  
6.1 General  
The most suitable equipment for the circumstances shall be used to take a sample, observing the precautions  
in 6.2 to  6.4 as appropriate.  EAS 148-7: 201 7 
4 © EAC  2017– All rights reserved  
 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, drums or containers chosen at random from a sufficiently large stock in order to meet the requirements 
of 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 mass of 
cement. The thickness of the layer to be considered is at  least 15 cm.  
Precautions to be taken include:  
a) not to operate in dusty or polluting atmospheres;  
b) to take the number of samples necessary to obtain the quantity prescribed in the second paragraph of 
8.1;  
c) to transfer the collected cement into a clean, dry a nd airtight container before proceeding with the 
operations described in Clause 8.  
NOTE  The equipment described in this standard (see annex A) does not allow for sample(s) to be taken during 
unloading.  
6.4 Sampling while loading into bulk transports or si los 
Sampling may be carried out only if suitable equipment is available and if there is access to the homogeneous 
phase of cement. Take the same precautions as those described 6.3a), b ) and c). 
6.5 Sampling from silos  
When sampling from a silo, an appropri ate quantity of cement shall be discarded to remove the hard deposit 
or unwanted mixture of different cements that may be in distribution system.  The quantity to be discarded is at 
the discretion of the manufacturer’s representative present during the samp ling operation. The necessary 
quantity prescribed in the second paragraph of 8.1 shall then be collected in clean and dry containers.  
7 Frequency at which sample are taken and choice of sample type  
The frequency of taking samples and the type of sample  (spot sample or composite sample) depends on the 
provision in:  agreement between producer and customer .  
8 Size and preparation of samples  
8.1 Size of sample to be taken  
Each laboratory sample (or sample for retest or retained sample) shall be of such a size  that all tests  wherever 
specified can be carried out twice.  
NOTE  In general, laboratory samples of at least 5 kg in mass tend to be sufficient but more may be needed to 
completely fill the container indicated in 9.2).  
The total quantity (spot sample or c omposite sample) to be taken shall be greater than or at least equal to that 
required for supplying to all the laboratories concerned , the samples indicated in the first paragraph above. 
This quantity shall be taken by the equipment specified in Clause 5 a nd in accordance with the procedures 
stated in Clause 6.  EAS 148-7: 201 7 
© EAC 2017 – All rights reserved  5 
 Spot samples, taken by the manufacturer, that are to be tested at a single laboratory may be exempted fro m 
the homogenisation procedures  given in 8.2 and 8.3 . 
8.2 Homogenisation  
8.2.1  General requir ements  
As soon as the sample indicated in the second paragraph of 8.1 has been obtained, it shall be carefully 
homogenized (preferably in a laboratory) with clean dry implements not liable to react with the cement.  
The homogenization shall be achieved usi ng a mixing machine, where available.  
In the absence of a mixing machine, the quantity of cement to be homogenised (see the second paragraph of  
8.1) shall be tipped onto a clean dry cloth (or plastics sheet) and shall then be mixed carefully using a shov el.  
This procedure shall only be used if :  
a) the ambient relative humidity is less than 85 %;  
b) all risk of the sample being affected by wind, rain, snow or dust is avoided.  
Whatever procedure is chosen, its efficiency shall have been demonstrated  (see 8.2.2 ) and it shall also be 
carried as quickly as possible to minimise the exposure of the cement to the air.  
8.2.2  Verification of the efficiency of the homogenization  
Take approximately equal quantities of two cements of differing  physical or chemical  charact eristics for 
example  Blaine fineness, by FDEAS 148 -6, and optionally colour.  
NOTE  To obtain the initial information, the colour of these micro -samples can be compared if care has been 
previously taken to select two cements of distinctly different colours.  
Mix these using one of the procedures described in 8.2.1 and note the time between starting and finishing the 
operation. Once the operation is judged to be complete, take 15 'micro -samples', each of 12 g - 20 g, from 
points equally distributed within the mass of which the homogeneity is to be verified).  
Determine the Blaine fineness three times on each of these micro -samples.  
Homogenization shall be considered to be obtained if the analysis of variance shows there to be no significant 
differences between  the 15 micro -samples .  
In the case of unsatisfactory result, appropriate steps shall be taken to achieve homogenisation,  for example  
mixing time may be extended.  
For a given procedure, the verification of homogenisation shall be carried out only once at t he time of 
choosing the procedure and records of satisfactory performance shall be retained.  
8.3 Division of the homogenised sample  
Immediately after homogenisation (see 8.2) of the sample, it shall be divided into the required number of 
laboratory or reta ined samples by one of the two following procedures:  
a) in the case where a mixing machine has been used, the required number of containers may be filled 
directly from the homogenised sample; and  
b) in the case where a mixing machine was not available, then the required number of laboratory or retained 
samples shall be prepared either by using a sample divider or, after quartering the quantity to be 
distributed, by extracting with a hard scoop increments of approximately 0.5 kg from each of the quarters EAS 148-7: 201 7 
6 © EAC  2017– All rights reserved  
 and trans ferring these successively into containers prepared for receiving the laboratory (or retained) 
samples. This operation shall be continued until the desired mass (indicated in the note to the first 
paragraph of 8.1) is obtained in each container.  
The sequen ce of distributing the contents of the hand scoop from which each laboratory sample is gradually 
made up shall be as follows.  
Distribute successively to each of the laboratory containers X, Y, Z, etc.  
– first a scoopful from A,  
– then a scoopful from B,  
– then a scoopful from C,  
– then a scoopful from D.  
This represents one distribution sequence; repeat the same sequence as many times as necessary to reach 
the quantity prescribed in the first paragraph of 8.1 (see Figure 1,  for example for a 50 - kg samples).  
Each laboratory (or retained) sample shall be packaged as stated in clause 9 and dispatched with minimum 
delay. It is then a matter for the receiving laboratory, to store, prepare and treat the sample in a manner 
appropriate to its subsequent use.  
 
 
Figu re 1 — Make up of laboratory samples  
8.4 Foreign materials in the sample  
During the above operations any foreign bodies that may appear shall, in all cases, be noted in the sampling 
report (Clause 10).  EAS 148-7: 201 7 
© EAC 2017 – All rights reserved  7 
 Removal of foreign materials shall only be carried out  with the agreement of all parties involved.  
9 Packaging and storage  
9.1 Principle  
The packaging of the samples and the method of storage shall always be such as to preserve the properties 
of the sampled cement . 
9.2 Containers  
The samples shall be packed, dispatched and stored in bags, drums, or solid containers. These shall be made 
of a material that is inert with respect to cement and non -corrodible. They shall be dry, impervious (to air and 
moisture) and clean. In this respect they shall not have been pr eviously used for packaging products, which 
are likely to affect the samples.  
To minimise aeration, the containers shall, as far as possible, be completely filled and their closure sealed 
(integral seal or other suitable means.  
NOTE  It should be noted th at packaging, however air -tight, cannot in the long term prevent a certain amount of 
aeration, the extent of which may vary depending on the properties of the product.  
When made of plastics, containers or bags shall only be used under the following conditi ons:  
a) the sheet from which they are made shall be at least 100 μm thick;  
b) the plastics material shall under no circumstances cause the cement to become 'air entraining' 
whether by loss from this material or as a result of surface treatment. On this point, check for the 
absence of risk by carrying out appropriate tests where needed; and  
c) provision shall also be made to seal them where necessary.  
9.3 Storage condition  
The samples shall preferably be stored at a temperature of less than 30 oC prior to testing.  
9.4 Identification of samples  
To identify the samples unambiguously, the containers (bags or drums) shall be clearly and indelibly marked 
in at least one place. When there is only one mark, this shall be on the body of the container and not on the 
lid.  
9.5 Authentication of samples  
If necessary, when this is required by the contract of sale or other provisions, the container shall bear an 
agreed seal authenticating the sample. This seal shall be fixed so as to prevent the unauthorized opening of 
the conta iner. EAS 148-7: 201 7 
8 © EAC  2017– All rights reserved  
 10 Sampling report  
10.1 General  
A sampling report corresponding to each sample shall be drawn up by the person responsible for the 
operation. Copies shall be attached to the laboratory (or retained), samples or placed inside the container in a 
protec tive envelope where necessary.  
10.2 Information to be included  
10.2.1  Obligatory information  
The report shall, unless otherwise agreed by the parties include the following obligatory information.  
a) name and address of the body responsible for the sampling;   
b) name and address of the customer (in the case of taking delivery);  
c) complete standard designation of the cement as specified in FDEAS 18 -1  
d) identity of the producing works;  
e) place, date and time of sampling;  
f) type of sample (spot or composite comprising ‘ n’ spot samples);  
g) identification mark on the sample container;  
h) any comments, particularly:  
i. the presence of foreign bodies;  
ii. the circumstances in which the operations took place which are likely to have an effect on the quality 
of the cement sampled, for examples transport conditions;  
iii. all information allowing a more precise identification of the cement sampled to be made, for example, 
the silo number.  
10.2.2  Optional information  
The report shall, unless otherwise agreed by the parties, include the follow ing optional information:  
a) definition of the lot, the approximate mass of the cement and the type of stock from which the sample 
has been taken, for  example: 3 000 t in bags in a warehouse;  
b) the type of container used for the laboratory samples.  
10.3 Authorization of the report  
The report and copies shall be signed by the representatives of the parties present at the sampling and/or any 
other responsible witness approved by the parties.  
10.4 Dispatch of the report  
In addition to the requirements of 10.1 , copies of the report shall be sent without delay to each of the parties 
concerned.  EAS 148-7: 201 7 
© EAC 2017 – All rights reserved  9 
 Annex A  
(informative)  
 
Typical examples of sampling equipment normally used  
 
a) Inner tube               b)  assembled tube  
Key 
L= 100 cm to 200 -cm 
Figure A.1 — Sampling t ube EAS 148-7: 201 7 
10 © EAC  2017– All rights reserved  
 
 
 
a) Side view                                                                                             b)  Front view  
 
Approximate size of ladle:  
Figure A.2 — Typical ladle  
 
Key 
1 Tube, diameter approximately 6 cm  
2 Spiral flight screw  EAS 148-7: 201 7 
© EAC 2017 – All rights reserved  11 
 3 End of flig ht screw acting as probe at point of entry of cement  
4 Discharge chute  
5 Electric motor  
Figure A.3 — Typical mechanical screw sampler (overall length approximately 200 cm)  
 
Key 
1 Tube  
2 Spiral flight screw  
3 Entry for cement  
4 Discharge chute  
5 Manual dri ve (or electric motor drive)  
Figure A.4 — Typical permanently installed mechanical screw sampler  EAS 148-7: 201 7 
12 © EAC  2017– All rights reserved  
 
 
Key 
1 ¼ turn screw  
2 Rubber inlet tube for factory air (3 bar)  
3 Discharge chute  
Figure A.5 — Sampling equipment  EAS 148-7: 201 7 
© EAC 2017 – All rights reserved  13 
 Bibliography  
[1] ISO 5725 -6 Accuracy (truene ss and precision) of measurement methods and results - Part6: use in 
practice of accuracy values  
[2] EN 196 -6, Methods of testing cement — Determination of fineness  
[3] EN 197 -2, Cement — Conformity evaluation  
[4] EN 196 -7; Methods testing cement — Part 7: Method of taking and preparing samples of cement.  EAS 148-7: 201 7 
© EAC 2017  – All rights reserved