ISO 13270:2013
(Main)Steel fibres for concrete — Definitions and specifications
Steel fibres for concrete — Definitions and specifications
ISO 13270:2013 specifies definitions and symbols, classification and codes, dimensions, masses and permissible variations, inspection methods, packing, delivery and storage for steel fibres for concrete. ISO 13270:2013 covers fibres intended for use in fibre-reinforced concrete, in all types of concrete and mortar, including sprayed concrete, flooring, precast, in situ and repair concretes. ISO 13270:2013 can also be referred to for fibres used in fibre-reinforced engineering material, such as stainless steel fibre use in reinforced refractory material.
Fibres d'acier pour béton — Définitions et spécifications
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 13270
First edition
2013-01-15
Steel fibres for concrete — Definitions
and specifications
Fibres d’acier pour béton — Définitions et spécifications
Reference number
©
ISO 2013
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the
address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols . 3
5 Classification . 3
6 Ordering information . 4
7 Requirements . 4
7.1 Dimensions and tolerances . 4
7.2 Surface condition . 5
7.3 Tensile strength of fibres . 6
7.4 Modulus of elasticity . 6
7.5 Bending requirements . 6
7.6 Mixing . 6
7.7 Reinforcing effect of the steel fibres in concrete . 6
7.8 Effect on consistency of concrete . 7
7.9 Effect on air of concrete. 7
8 Testing and Inspection . 7
8.1 General . 7
8.2 ITT (Initial Type Test) . 7
8.3 Factory production control (FPC) . 8
9 Packaging and package marking .11
Annex A (normative) Reference concretes .13
Bibliography .17
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 13270 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 17, Steel wire rod
and wire products.
iv © ISO 2013 – All rights reserved
INTERNATIONAL STANDARD ISO 13270:2013(E)
Steel fibres for concrete — Definitions and specifications
1 Scope
This International Standard specifies definitions and symbols, classification and codes, dimensions,
masses and permissible variations, inspection methods, packing, delivery and storage for steel fibres
for concrete.
This International Standard covers fibres intended for use in fibre-reinforced concrete, in all types of
concrete and mortar, including sprayed concrete, flooring, precast, in situ and repair concretes
This International Standard can also be referred to for fibres used in fibre-reinforced engineering
material, such as stainless steel fibre use in reinforced refractory material.
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 404, Steel and steel products — General technical delivery requirements
ISO 1920-2:2005, Testing of concrete — Part 2: Properties of fresh concrete
ISO 5725-2:1994, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic
method for the determination of repeatability and reproducibility of a standard measurement method
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 7989-1, Steel wire and wire products — Non-ferrous metallic coatings on steel wire — Part 1:
General principles
ISO 10474, Metallic products — Inspection documents
ISO 22034-1, Steel wire and wire products — Part 1: General test methods
EN 197-1:2011, Cement — Part 1: Composition, specifications and conformity criteria for common cements
EN 206-1, Concrete — Part 1: Specification, performance,production and conformity
EN 933-2, Tests for geometrical properties of aggregates — Part 2: Determination of particle size distribution
— Test sieves, nominal size of apertures
EN 934-2:2009, Admixtures for concrete. mortar and grout — Part 2: Concrete admixtures — Definitions.
requirements, conformity, marking and labeling
EN 1008, Mixing water for concrete — Specification for sampling, testing and assessing the suitability of
water, including water recovered from processes in the concrete industry, as mixing water for concrete
EN 1766:2000, Products and systems for the protection and repair of concrete structures — Test methods —
Reference concretes for testing
EN 1992-1-1, Eurocode 2: Design of concrete structures — Part 1-1: General rules and rules for buildings
EN 12350-1, Testing fresh concrete — Part 1: Sampling
EN 12350-3, Testing fresh concrete — Part 3: Vebe test
EN 12350-4, Testing fresh concrete — Part 4: Degree of compactability
EN 14651, Test method for metallic fibre concrete — Measuring the flexural tensile strength (limit of
proportionality (LOP). residual)
EN 14845-2, Test methods for fibres in concrete — Part 2: Effect on concrete
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
steel fibres
straight or deformed pieces of cold-drawn steel wire, straight or deformed cut sheet fibres, melt-
extracted fibres, shaved cold-drawn wire fibres and fibres milled from steel blocks which are suitable
to be homogenously mixed into concrete or mortar
Note 1 to entry: Steel fibres are suitable reinforcement material for concrete because they possess a thermal
expansion coefficient equal to that of concrete, their Young’s Modulus is at least 5 times higher than that of
concrete and the creep of regular carbon steel fibres can only occur above 370 °C.
3.2
length
distance between the outer ends of the fibre
3.2.1
developed length
length of the deformed fibres after straightening the fibre without deforming the cross-section
3.3
equivalent diameter
diameter of a circle with an area equal to the mean cross-sectional area of the fibre
Note 1 to entry: For circular fibres, the equivalent diameter is equal to the diameter of the fibres.
3.4
aspect ratio
ratio of length (l) to equivalent diameter of the fibre
3.5
fibre shape
specific outer configuration of the fibres, both in the longitudinal direction and in the shape of the cross-
section and also the possible surface coatings and/or bundling of fibres
3.6
tensile strength of fibre
stress corresponding to the maximum force that one fibre can resist
Note 1 to entry: The methods concerning how to determine the tensile strength are explained in 7.3. The tensile
strength is calculated by dividing the maximum force a fibre can resist by the mean cross-sectional area of the fibre.
3.7
crack mouth opening displacement
CMOD
linear displacement measured by a transducer installed on a prism subjected to a centre-point load F
3.8
elastic modulus
initial slope of the tensile stress versus tensile strain curve
2 © ISO 2013 – All rights reserved
3.9
declared value
value for a product property, determined in accordance with this standard, that a manufacturer is confident
of achieving within the given tolerances taking into account the variability of the manufacturing process
3.10
linear displacement
δ
displacement measured by a transducer installed on a prism subjected to a centre-point load F
3.11
residual flexural strength
notional stress at the tip of the notch which is assumed to act in an uncracked mid-span section, with
linear stress distribution, of a prism subjected to the centre-point load Fj corresponding to CMODj where
CMODj > CMODδ; or to δj where δj > δF ( j = 1,2,3,4)
L
Note 1 to entry: F is the load at LOP (see EN 14651).
L
4 Symbols
For the purposes of this document, the symbols and definitions in Table 1 apply.
Table 1 — Symbols and definitions
Symbols Definitions Unit
a
w width of the fibre mm
a
t thickness of the fibre mm
d diameter or equivalent diameter of the fibre mm
R tensile strength of the fibre MPa
m
l length of the fibre mm
λ aspect ratio of the fibre (λ = l/d)
l developed length of the fibre mm
d
m mass of the fibre g
ρ density of steel kg/m
a
Description for rectangular fibres.
5 Classification
The steel fibres shall conform to one of the groups and one of the shapes listed below:
a) Group
Steel fibres shall be classified into one of the following groups, in accordance with the basic material
used for the production of the fibres.
Group I: cold-drawn wire
Group II: cut sheet
Group III: melt extracted
Group IV: shaved cold-drawn wire
Group V: milled from blocks
b) Shape
Fibres shall be either straight or deformed. The manufacturer shall declare the shape of the fibre. The
control and tolerances on the shape shall be specified for each different shape separately.
When applicable, the type of bundling shall be declared.
c) Coating
When steel fibres are supplied with a coating (e.g. zinc coating), the type and characteristic quantity in
g/m shall be declared. The control of the quantity shall be a function of the type of coating and shall be
declared by the manufacturer. In the case of a zinc coating, the determination of the coating thickness
shall be performed according to ISO 7989-1. In the case of a Zn or Zn/Al coating, a protection against
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.