CEN/TR 16912:2016

SLOVENSKI STANDARD
01-oktober-2016
Smernice za postopek podpore evropski standardizaciji cementov
Guidelines for a procedure to support the European standardization of cements
Leitlinien für ein Verfahren zur Unterstützung der europäischen Normung von Zement
Directrices générales pour l’obtention du soutien de la standardisation européenne des
ciments
Ta slovenski standard je istoveten z: CEN/TR 16912:2016
ICS:
01.120 Standardizacija. Splošna Standardization. General
pravila rules
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TR 16912
TECHNICAL REPORT
RAPPORT TECHNIQUE
May 2016
TECHNISCHER BERICHT
ICS 91.100.10
English Version
Guidelines for a procedure to support the European
standardization of cements
Directrices générales pour l'obtention du soutien de la Leitlinien für ein Verfahren zur Unterstützung der
standardisation européenne des ciments europäischen Normung von Zement

This Technical Report was approved by CEN on 24 May 2016. It has been drawn up by the Technical Committee CEN/TC 51.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 16912:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Procedure of application and standardization of a new cement . 5
4.1 General information on standardization processes . 5
4.2 Classification of new cements . 5
4.3 General criteria for the assessment of new cements . 6
4.4 Application for the standardization of a new cement . 6
4.4.1 General . 6
4.4.2 The dossier and its contents . 7
4.5 Evaluation and decision by CEN/TC 51 . 7
5 Assessment of fitness for use . 8
5.1 Meaning of “fitness for use” . 8
5.2 Elements of the assessment of fitness for use . 8
5.3 Characteristics of the new cement which are relevant to its fitness for use . 8
5.4 Methods for the assessment and verification of the relevant product characteristics . 11
5.4.1 General . 11
5.4.2 Constituents and composition of the cement . 11
5.4.3 Durability aspects . 12
5.4.4 Environmental aspects . 13
5.4.5 Possible health impact . 14
6 Patents and other intellectual property rights (IPR) relevant for the standardization
of the new cement . 15
Bibliography . 16

Tables
Table 1 — Categorization of new cements and the corresponding requirements . 6
Table 2 — Product characteristics of a new cement that may be relevant to its fitness for use . 9
Table 3 — Characterization of constituents . 12

European foreword
This document (CEN/TR 16912:2016) has been prepared by Technical Committee CEN/TC 51 “Cement
and building limes”, the secretariat of which is held by NBN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Introduction
The willingness to improve construction products leads to the optimization of existing cements as well
as to the development of new binders. Improvement may concern in particular the performance of the
products, the reduction of production costs or the lowering of the environmental impact. With regards
to the environment, a fundamental policy objective of the European Union is to encourage/incentivise a
reduction in CO emissions within a framework of sustainable development. Cement manufacturers are
reducing their specific CO emissions e.g. by the production of cements with a lower clinker content. At
the same time, the expectations of contractors, ready-mixed concrete producers and precast concrete
manufacturers should also be met by maintaining high levels of performance in cements and in the
durability of concrete.
Existing cement standards, in particular EN 197-1, allow manufacturers to select cement compositions
with low clinker content, i.e. CEM III/B and C, CEM IV/B, CEM V. However, these cements are often used
for their good resistance to chemically aggressive environments but do not necessarily achieve, in
concrete, the early age strength required where formwork is to be removed at less than 24 h.
Maintaining performance, in particular early strength and durability related characteristics, while
reducing specific CO emissions by the development of new types of cement is expected to be one of the
main challenges of the coming years.
When considering such new cements intended to be used to produce structural concrete the question
arises whether these products should be covered by European Standards or by European Technical
Assessments (ETAs). For an answer, the various EU policy documents referenced in the bibliography
should be considered, in particular the “Council Conclusions on standardization and innovation
(Brussels, 25 September 2008)” [7] which highlight “the essential contribution which standardization
can make towards developing innovation and competitiveness, by facilitating access to markets,
enabling interoperability between new and existing products, services and processes, enhancing
protection of users, giving consumers confidence in innovations and disseminating research results”.
CEN and CENELEC have responded to all the EU initiatives and adopted, in October 2008, an integrated
approach titled “Standardization Innovation and Research (STAIR)”. From this common approach of the
EU and CEN, it is clear that European standardization may cover innovation.
An application to standardize a new cement should be submitted to the Technical Committee
CEN/TC 51 based on a dossier introduced by the applicant who may, according to CEN/CENELEC
Internal Regulations – Part 2:2015 [14], be a national standardization body (CEN Member), a CEN
Technical Committee, the EU or EFTA Secretariat, an international organization or an European trade,
professional, technical or scientific organization. It is essential that all applicants are aware in advance
of the information they should provide to CEN/TC 51 in the dossier in order to demonstrate the fitness
for intended use of the new cement. For this purpose, CEN/TC 51 has prepared this CEN Technical
Report.
1 Scope
This CEN Technical Report provides guidance for the procedure to be followed in order to support the
European standardization of new cements that are not covered by an existing European Standard.
The term “new cement” has been used in this document to describe its primary focus; however, this
same guideline procedure may be used for other products to be standardized by CEN/TC 51.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 197-1, Cement — Part 1: Composition, specifications and conformity criteria for common cements
EN 197-2, Cement — Part 2: Conformity evaluation
EN 206, Concrete — Specification, performance, production and conformity
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 197-1, EN 197-2 and EN 206
apply.
4 Procedure of application and standardization of a new cement
4.1 General information on standardization processes
For general information on the process of European product standardization, see
http://boss.cen.eu/Pages/default.aspx.
4.2 Classification of new cements
The procedure to be followed in order to support the European standardization of a new cement
depends on the type of the cement, i.e. on the question whether the new cement is similar to cements
that already have been standardized by CEN/TC 51. Following this principle, new cements can be
classified in the following three categories:
1) Category 1: cement from a new combination of traditional and well-tried constituents;
2) Category 2: cement basically corresponding to cement types defined in existing standards but
containing one or more new constituents;
3) Category 3: cement differing substantially from those types defined in existing standards, e.g.
produced with a new kind of clinker or based on different physicochemical phases/principles.
Cement of category 2 should be similar to common cements, i.e. its hydration should be based on the
formation of calcium silicate hydrates (CSH).
4.3 General criteria for the assessment of new cements
The general requirements for assessing new cements differ depending on their classification according
to 4.2; these requirements should be fulfilled before CEN/TC 51 considers the possibility of European
standardization of a new cement:
— for cements of category 1, the mechanical, physical and chemical performances listed in 5.3 as well
as durability related characteristics described in 5.4.3 should be assessed, taking into account the
intended use of the cement.
— for cements of category 2, in addition to the requirements for cement of category 1, the potential
environmental and health impacts of end-use construction products that incorporate the cement
should be assessed as described in 5.4.4 and 5.4.5, respectively.
— for cements of category 3, in addition to the requirements for cement of category 2, also relevant
practical experience should be gained under conditions approved by CEN/TC 51, e.g. through an
ETA or another comparable procedure, for assessing the fitness for the intended use prior to
identifying the general criteria, amongst other things, for the possibility of European
standardization.
The categorization of new cements and the corresponding requirements are summarized in Table 1.
Table 1 — Categorization of new cements and the corresponding requirements
Category 1 Category 2 Category 3
Cement from a new Cement containing a minor Cement differing substantially
combination of constituents amount of one or more new from those types defined in
according to EN 197–1 constituents existing standards
Assessment of
mechanical, physical and chemical performances
Assessment of
durability related characteristics
Assessment of influence on
environmental performance
Assessment of
possible health impact
Relevant practical experience
gained under approved
conditions prior to
European standardization
4.4 Application for the standardization of a new cement
4.4.1 General
An application for the standardization of a new cement should be pres
...