ISO 22965-1:2007

INTERNATIONAL ISO
STANDARD 22965-1
First edition
2007-04-01
Concrete —
Part 1:
Methods of specifying and guidance
for the specifier
Béton —
Partie 1: Méthodes de spécification et lignes directrices pour le
spécificateur
Reference number
©
ISO 2007
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ii © ISO 2007 – All rights reserved

Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 2
4 Symbols and abbreviated terms . 5
5 Specification of concrete . 6
6 Exchange of information. 10
Annex A (informative) Guidance for the specifier of exposure classes, consistence classes and
strength classes. 12
Annex B (informative) Performance-related design methods with respect to durability . 17
Annex C (normative) Identity testing for compressive strength. 19
Annex D (informative) Guidance on the national annex. 21
Bibliography . 22

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 22965-1 was prepared by Technical Committee ISO/TC 71, Concrete, reinforced concrete and pre-stressed
concrete, Subcommittee SC 3, Concrete production and execution of concrete structures.
ISO 22965 consists of the following parts, under the general title Concrete:
⎯ Part 1: Methods of specifying and guidance for the specifier
⎯ Part 2: Specification of constituent materials, production of concrete and compliance of concrete
iv © ISO 2007 – All rights reserved

Introduction
This International Standard is intended for nations that have no national concrete standard and it sets out a
framework of principles for nations revising their national standards. To be operable, this International
Standard needs a national annex or a reference to the national complementary provisions. This International
Standard can also be applied on specific projects where a project specification supplements the standards in
lieu of a national annex applicable at the place of use.
This International Standard is applied under various climatic and geographical conditions, various levels of
protection and under different established regional traditions and experience. Consequently, this International
Standard includes classes for concrete with different properties to cover the most frequent and normal
situations. For certain uses of concrete, additional or deviating rules can be necessary. The national
provisions, preferably given in a national annex to this International Standard, or the project specification can
specify any additional or deviating requirements.
During the development of this International Standard, consideration was given to detailing a performance-
related approach to the specification of durability. It was concluded that such an approach is not yet
sufficiently developed to be detailed in an International Standard. ISO/TC 71/SC 3 recognizes that some ISO
member bodies have developed local tests and criteria for performance-based specifications. This
International Standard does not exclude the continuation and development of such practices valid in the place
of use of the concrete as an alternative to the prescriptive approach. It is necessary that these requirements
be specified in the national annex or national complementary provisions. The Model Code for Service Limit
Design (MC-SLD), which was published by fib in 2006, is a promising basis for implementation as future
International Standards from ISO/TC 71; see Annex B.
This International Standard incorporates rules for the use of constituent materials that are covered by
International Standards. For materials for which International Standards have not yet been published, the
standards cited in the national annex (often the regional or national standards) apply; see 5.1. In particular,
documents in current use for by-products of industrial processes, recycled materials, etc. are based on local
experience. Until international specifications for these materials are available, this International Standard does
not provide rules for their use, but instead refers to the national annex.
This International Standard defines the two parties involved in the ordering and the supply of concrete, which
are hereinafter referred to as specifier and supplier. In practice, there can be several parties specifying
requirements at various stages of the design and construction process, e.g. the client, the designer, the
quantity surveyor, the constructor and the concreting subconstructor. Each is expected to pass the specified
requirements, together with any additional requirements, to the next party in the chain until they reach the
supplier. In the terms of this International Standard, this final compilation of requirements is known as the
“concrete specification”. In some cases, the specifier and the supplier is the same party (e.g. a constructor
doing design, production and execution). In the case of ready-mixed concrete, the purchaser is the specifier.
This part of ISO 22965 also gives rules for the exchange of information between the parties. Contractual
matters are not addressed.
This International Standard is intended for use with ISO 22965-2 and with the future ISO 22966, currently
under development, which will give the requirements associated with the level of quality specified and the
methods to be employed for the execution of concrete structures.

INTERNATIONAL STANDARD ISO 22965-1:2007(E)

Concrete —
Part 1:
Methods of specifying and guidance for the specifier
1 Scope
This part of ISO 22965 applies to concrete for structures cast in situ, pre-cast structures and structural pre-cast
products for buildings and civil engineering structures. The concrete can be mixed on site, ready-mixed concrete
or produced in a plant for pre-cast concrete products.
This part of ISO 22965 applies to concrete compacted to retain no appreciable amount of entrapped air other
than entrained air and to normal-weight, heavy-weight and light-weight concrete.
Other International Standards for specific products, e.g. pre-cast products, or for processes within the field of the
scope of this part of ISO 22965, can require or permit deviations from this part of ISO 22965.
This part of ISO 22965 contains requirements for the specification of concrete and guidance for the exchange
of information between the specifier and supplier. An informative annex gives general guidance on specification.
More specific guidance on specification related to the local conditions can be given in a national annex.
This part of ISO 22965 does not apply to
⎯ concrete with a maximum aggregate size equal to or less than 4 mm or 5 mm (mortar),
⎯ aerated concrete,
⎯ foamed concrete,
⎯ concrete with an open structure (“no-fine aggregate” concrete),
⎯ concrete with a density less than 800 kg/m ,
⎯ refractory concrete.
This part of ISO 22965 does not cover health and safety requirements for the protection of workers during
production and delivery of concrete.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 1920-1, Testing of concrete — Part 1: Sampling of fresh concrete
ISO 1920-3, Testing of concrete — Part 3: Making and curing test specimens
ISO 1920-4, Testing of concrete — Part 4: Strength of hardened concrete
ISO 22965-2:2007, Concrete — Part 2: Specification of constituent materials, production of concrete and
compliance of concrete
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
addition
finely divided or ground material used in concrete in order to improve certain properties or to achieve special
properties
NOTE This part of ISO 22965 deals with two types of additions:
⎯ nearly inert additions (type I);
⎯ pozzolanic or latent hydraulic additions (type II).
3.2
admixture
material added during the mixing process of concrete in small quantities relative to the mass of cement to
modify the properties of fresh or hardened concrete
3.3
aggregate
granular mineral material suitable for use in concrete
NOTE Aggregates can be natural, artificial or recycled from material previously used in construction, e.g. recycled
concrete aggregate.
3.4
batch
quantity of fresh concrete produced in one cycle of operations of a mixer or the quantity discharged during
1 min from a continuous mixer or quantity of concrete transported in a vehicle
NOTE For testing to be performed at site, the concrete transported as one load in a vehicle can be considered as
one batch.
3.5
cement
〈hydraulic binder〉 finely ground inorganic material that, when mixed with water, forms a paste that sets and
hardens by means of hydration reactions and processes and that, after hardening, retains its strength and
stability even under water
3.6
characteristic strength
value of strength below which 5 % of the population of all possible strength determinations of the volume of
concrete under consideration are expected to fall
3.7
concrete
material formed by mixing cement, coarse and fine aggregate and water, with or without the incorporation of
admixtures and additions, which develops its properties by hydration of the cement
NOTE International Standards for aggregate may define aggregates larger than 4 mm or 5 mm as coarse. In
concrete for general-purpose use, the coarse aggregate should normally have a maximum aggregate size of at least
16 mm.
2 © ISO 2007 – All rights reserved

3.8
concrete specification
all documented technical requirements necessary to produce and deliver the concrete
3.9
compliance test
test performed to verify that the concrete complies with some aspect of the specification
3.10
delivery
process of handing over the fresh concrete by the producer
3.11
designed concrete
concrete for which the minimum characteristic strength, other required properties and additional
characteristics are specified to the supplier who is responsible for providing a concrete complying with the
specified minimum characteristic strength, any other specified properties and any spec
...