SIST EN 196-7:2008

SLOVENSKI STANDARD
01-marec-2008
1DGRPHãþD
SIST EN 196-7:1995
Metode preskušanja cementa - 7. del: Metode odvzemanja in priprave vzorcev
cementa
Methods of testing cement - Part 7: Methods of taking and preparing samples of cement
Prüfverfahren für Zement - Teil 7: Verfahren für die Probenahme und Probenauswahl
von Zement
Méthodes d'essai des ciments - Partie 7: Méthodes de prélèvement et d'échantillonnage
du ciment
Ta slovenski standard je istoveten z: EN 196-7:2007
ICS:
91.100.10
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 196-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2007
ICS 91.100.10 Supersedes EN 196-7:1989
English Version
Methods of testing cement - Part 7: Methods of taking and
preparing samples of cement
Méthodes d'essai des ciments - Partie 7: Méthodes de Prüfverfahren fur Zement - Teil 7: Verfahren fur die
prélèvement et d'échantillonnage du ciment Probenahme und Probenauswahl von Zement
This European Standard was approved by CEN on 24 October 2007.
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 application 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 Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 196-7:2007: E
worldwide for CEN national Members.

Contents Page
Foreword. 3
1 Scope. 4
2 Normative references . 4
3 Terms 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
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. 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 the report. 12
10.4 Dispatch of the report. 12
Annex A (informative) Typical examples of sampling equipment normally used. 13
Bibliography . 18

Foreword
This document (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 2008, 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.
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 editorial 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 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 been 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 conflict 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, Denmark, 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.

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 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
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 wagons, 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 following 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 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 or the specification in an order.
3.4
increment
quantity of cement taken 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 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 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, obtained 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 tests
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 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 sampling 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 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.
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 it 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 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
...