kSIST FprEN 206-2:2025

SLOVENSKI STANDARD
oSIST prEN 206-2:2024
01-oktober-2024
Beton - Specifikacija, lastnosti, proizvodnja in skladnost - 2. del: Ugotavljanje
skladnosti in certificiranje
Concrete - Specification, performance, production and conformity - Part 2: Conformity
assessment and certification
Beton - Festlegung, Eigenschaften, Herstellung und Konformität - Teil 2:
Konformitätsbewertung und Zertifizierung
Béton - Spécification, performances, production et conformité - Partie 2 : Évaluation de
la conformité et certification
Ta slovenski standard je istoveten z: prEN 206-2
ICS:
03.120.20 Certificiranje proizvodov in Product and company
podjetij. Ugotavljanje certification. Conformity
skladnosti assessment
91.100.30 Beton in betonski izdelki Concrete and concrete
products
oSIST prEN 206-2:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 206-2:2024
oSIST prEN 206-2:2024
DRAFT
EUROPEAN STANDARD
prEN 206-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2024
ICS 91.100.30 Will supersede EN 206:2013+A2:2021
English Version
Concrete - Specification, performance, production and
conformity - Part 2: Conformity assessment and
certification
Béton - Spécification, performances, production et Beton - Festlegung, Eigenschaften, Herstellung und
conformité Konformität
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 104.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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-CENELEC
Management Centre 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, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 206-2:2024 E
worldwide for CEN national Members.

oSIST prEN 206-2:2024
prEN 206-1:2024 (E)
Contents Page
European foreword . 3
0 Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols and abbreviations . 7
5 Conformity assessment and assessment criteria. 7
5.1 General . 7
5.2 Conformity assessment for designed concrete . 8
5.3 Conformity assessment of prescribed concrete . 11
5.4 Actions in the case of non-conformity of the product or in case of negative assessments 12
6 Certification of concrete production . 12
Annex A (informative) Rules of application of control charts . 13
A.1 Introduction . 13
A.2 Control based on the cusum system . 13
A.3 Control based on Shewhart charts with modified limits by variables . 14
Annex B (informative) Example of a certification scheme for factory production control of
concrete produced according to prEN 206 . 15
B.1 Initial assessment of the factory production control . 15
B.2 Continuous surveillance of the factory production control . 16
B.3 Certification of the factory production control . 17
B.4 Measures in case of non-conformity . 17
Bibliography . 18

oSIST prEN 206-2:2024
prEN 206-1:2024 (E)
European foreword
This document (prEN 206-2:2024) has been prepared by Technical Committee CEN/TC 104 “Concrete and
related products”, the secretariat of which is held by SN.
This document is currently submitted to the CEN Enquiry.
This document will partially supersede EN 206:2013+A2:2021.
oSIST prEN 206-2:2024
prEN 206-1:2024 (E)
0 Introduction
0.1 General
This document defines provisions for conformity assessment of concrete.
prEN 206-1 gives the necessary information allowing the evaluation of conformity of conformity of
concrete. This document, prEN 206-2, contains conformity assessment requirements for concrete.
Figure 1 illustrates the procedure for assessment of concrete in prEN 206.

Figure 1 — Assessment of concrete in prEN 206
This document forms part of three European Standards, written by CEN/TC 104 and covering specification,
performance, production and conformity of concrete.
— Concrete — Specification, performance, production and conformity — Part 1: Performance,
requirements, factory production control and assessment criteria for individual values
— Concrete — Specification, performance, production and conformity — Part 2: Conformity assessment
and certification
— Concrete — Specification, performance, production and conformity — Part 3: Additional requirements
for specification and conformity of concrete for special geotechnical works
0.2 Provisions valid in the place of use for prEN 206-2
(1) This document will be applied under different legal frameworks and different regional safety
requirements. Where general solutions were not possible, the relevant clauses contain permission for the
application of provisions valid in the place of use of the concrete.
(2) National choice is allowed in this document where explicitly stated that provisions valid in the place of
use may be given.
(3) The national standard implementing prEN 206-2 can have a National Annex or complementary standard
containing all national choices to be used in the relevant country.
(4) National choice is allowed in prEN 206-2 in the following:
5.2.1.3 (5) 6 (1)
oSIST prEN 206-2:2024
prEN 206-1:2024 (E)
NOTE The National Annex can contain, directly or by reference, non-contradictory complementary information
for ease of implementation, provided it does not alter any provisions of this document.
1 Scope
(1) This document specifies the scheme for the conformity assessment and assessment criteria for concrete.
(2) The document provides technical rules for testing of samples and assessment of the performance of the
concrete. It also provides rules for actions to be followed in the event of non-conformity of the product or
negative assessment.
(3) In this document, the word “concrete” is used to refer concrete as defined in prEN 206-1. Such a concrete
is produced at a given plant and belongs to a particular type and a particular strength class, as defined and
specified in prEN 206-1.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
prEN 206-1, Concrete - Specification, performance, production and conformity - Part 1: Performance,
requirements, factory production control and assessment criteria for individual values
EN 12350-1, Testing fresh concrete - Part 1: Sampling and common apparatus
EN 12390-7, Testing hardened concrete - Part 7: Density of hardened concrete
EN ISO/IEC 17065, Conformity assessment – Requirements for bodies certifying products, processes and
services
3 Terms and definitions
For the purposes of this document, the terms and definitions of prEN 206-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
average outgoing quality AOQ
fr: qualité moyenne après contrôle AOQ
de: Durchschlupf AOQ
percentage of the unknown distribution below the required characteristic value multiplied by the
corresponding acceptance probability of that distribution when using the applied conformity assessment
Note 1 to entry: In the case of strength, the word ‘required’ refers to the characteristic strength for the specified
compressive strength class or the characteristic strength of the reference concrete of the family.
3.2
average outgoing quality limit AOQL
fr: limite de la qualité moyenne après contrôle AOQL
de: maximaler Durchschlupf AOQL
maximum average fraction below the required characteristic value in the accepted (or outgoing) concrete
production
oSIST prEN 206-2:2024
prEN 206-1:2024 (E)
3.3
acceptable quality level AQL
fr: niveau de qualité acceptable NQA
de: annehmbare Qualitätsgrenze AQL
percentage of the unknown distribution worse than the specified characteristic of the property under
consideration that is considered satisfactory for the production of concrete
3.4
accreditation
third-party attestation related to a conformity assessment body conveying formal demonstration of its
competence, impartiality and consistent operation in performing specific conformity assessment activities
[SOURCE: ISO/IEC 17000: 2020]
3.5
certification
third-party attestation related to an object of conformity assessment, with the exception of conformity
accreditation
[SOURCE: ISO/IEC 17000: 2020]
3.6
certification scheme
certification system related to specified products, to which the same specified requirements, specific rules
and procedures apply
Note 1 to entry: The rules, procedures and management for implementing product, process and service certification
are stipulated by the certification scheme.
[SOURCE: ISO/IEC 17065: 2012]
3.7
conformity assessment
demonstration that specified requirements are fulfilled
[SOURCE: ISO/IEC 17000: 2020]
3.8
conformity assessment body
body that performs conformity assessment activities, excluding accreditation
[SOURCE: ISO/IEC 17000: 2020]
3.9
declaration
first-party attestation
[SOURCE: ISO/IEC 17000: 2020]
3.10
verification
fr: vérification
de: Nachweise
confirmation by examination of objective evidence that specified requirements have been fulfilled
oSIST prEN 206-2:2024
prEN 206-1:2024 (E)
4 Symbols and abbreviations
For the purposes of this document, the following symbols apply.
f Characteristic compressive strength of concrete
ck
NOTE 1  Where used in this standard this applies to both f and f .
ck,cyl ck,cube
f Characteristic compressive strength of concrete determined by testing cylinders
ck,cyl
f Compressive strength of concrete determined by testing cylinders
c,cyl
f Characteristic compressive strength of concrete determined by testing cubes
ck,cube
f Compressive strength of concrete determined by testing cubes
c,cube
f Mean compressive strength of concrete
cm
NOTE 2  Where used in this standard this applies to both f and f .
cm,cyl cm,cube
f Mean compressive strength of concrete at the age of (j) days
cm,j
f Individual test result for compressive strength of concrete
ci
f Characteristic tensile splitting strength of concrete
ctk,sp
f Mean tensile splitting strength of concrete
ctm,sp
f Individual test result for tensile splitting test of concrete
cti,sp
σ Estimate for the standard deviation of a population
AOQ Average outgoing quality
AOQL Average outgoing quality limit
AQL Average quality level
n Number
5 Conformity assessment and assessment criteria
5.1 General
(1) Conformity assessment comprises the combination of actions and decisions to be taken in accordance
with conformity rules adopted in advance to assess the conformity of the concrete with its specification.
NOTE 1 The properties of concrete used for conformity assessment are those measured by the appropriate tests
using standardized procedures. The actual values of the properties of the concrete in the structure may differ from
those determined by the tests depending on, e.g. dimensions of the structures, placing, compaction, curing and
environment.
(2) Where tests for factory production control according to prEN 206-1 are the same as those required for
conformity assessment, they are permitted to be taken into account for the assessment of conformity. Also
other test data on the delivered concrete may be used in the conformity assessment.
(3) The conformity or non-conformity is judged against the assessment criteria. Conformity assessment by
a party different from the producer applies for the concrete delivered and not for the whole production.
Non-conformity shall lead to further action at the place of production and on the construction site (see 5.4).
(4) The outcome of conformity assessment depends on the party assessing conformity or results. The result
nd
of a conformity assessment by the producer is a declaration of conformity (DoC). The assessment by a 2
rd
party results in a report on the assessment. The outcome of a 3 party assessment is a report on the
rd
assessment and an optional certification by the 3 party.
nd rd
NOTE 2 2 and 3 party positive assessments increase confidence in DoC. Negative assessments create doubt in
DoC and initiate a series of actions.
oSIST prEN 206-2:2024
prEN 206-1:2024 (E)
5.2 Conformity assessment for designed concrete
5.2.1 Conformity assessment for compressive strength
5.2.1.1 General
(1) In the sampling and testing plan and the assessment criteria distinction is made between initial
production and continuous production.
(2) Initial production covers the production until at least 35 test results are available.
(3) Continuous production is achieved when at least 35 test results are obtained over a period not exceeding
12 months.
(4) If the production has been suspended more than 12 months, the criteria, sampling and testing plan given
for initial production shall be adopted.
(5) During continuous production, the sampling and testing plan and the criteria for initial production may
be adopted.
(6) If the strength is specified for a different age, the conformity is assessed on specimens tested at the
specified age.
5.2.1.2 Sampling and testing
(1) The test result shall be that obtained from an individual specimen or the average of the results when
two or more specimens made from one sample are tested at the same age.
(2) Where two or more specimens are made from one sample and the range of the test values is more than
15 % of the mean then the results shall be disregarded unless an investigation reveals an acceptable reason
to justify disregarding an individual test value.
5.2.1.3 Assessment criteria for compressive strength
(1) The achievement of the specified characteristic strength shall be assessed by one of the following
methods.
Method A: Initial production
(2) The mean strength of non-overlapping or overlapping groups of three consecutive results shall satisfy:
f ≥+f 4 N/mm (2)
( )
cm cm
NOTE 1 The assessment criteria are developed on the basis of non-overlapping test results. Application of the
criteria to overlapping test results increases the risk of rejection.
Method B: Continuous production
(3) Conformity assessment shall be made on test results taken during an assessment period that shall not
exceed the period given by one of the following options depending on the rate of testing:
— for assessment with lower testing rates (number of test results for designed concrete less than 35 per
three months), the assessment period shall comprise at least 15 results and not more than 35
consecutive results taken over a period not exceeding 6 months;
— for assessment with higher testing rates (number of test results for designed concrete 35 or more per
three months) the assessment period shall comprise at least 15 consecutive results and not exceed
three months.
(4) The mean strength of non-overlapping or overlapping groups of consecutive test results obtained from
a single concrete or a concrete family according to prEN 206-1 in an assessment period shall satisfy:
oSIST prEN 206-2:2024
prEN 206-1:2024 (E)
ff +1,48σ N/mm (3)
( )
cm ck
NOTE 2 Formula (3) permits to achieve a maximum average outgoing quality (AOQ) not exceeding 5,0 %.
Method C: Use of control charts
(5) Method C is an option for assessing conformity by the use of control charts when conditions of Method
B are established. Choice on the implementation of method C may be given in provisions valid in the place
of use.
(6) The control system shall comprise the application of a recognized model of control chart and have the
following characteristics:
— achieve a maximum average outgoing quality (AOQ) not exceeding 5,0 %;
— aim to ensure conformity of the relevant production with the required characteristic strength;
— include regular monitoring of strength and standard deviation or deviations from target values;
— where applicable, include one or more procedures for speeding the response of the system (e.g. use of
early strength data, use of concrete families);
— define and apply clear decision rules for conformity and warning limits;
— when the control chart shows that the standard deviation is ≥ 0,5 N/mm above the currently applied
value, change the applied value.
NOTE 3 As a control chart comprises successive sampling plans (with a known standard deviation), the operating-
characteristic curve of the individual sampling plan can be established. The AOQ curve is then determined by
multiplying each percentage of all possible results below the required characteristic strength in the production by the
corresponding acceptance probability.
NOTE 4 Annex A gives a method of application for cusum control charts and for Shewhart control charts with
examples of conformity rules that achieve an average outgoing quality limit not exceeding 5,0 %. Guidance on values
other than those given in Annex A are given in CEN/TR 16369, which for cusum control charts is based on [1].
5.2.2 Conformity ass
...