1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 13270:2013Steel fibres for concrete Definitions and specificationsBS ISO 13270:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO
2、13270:2013. The UK participation in its preparation was entrusted to TechnicalCommittee ISE/106, Wire Rod and Wire.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract
3、. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013ISBN 978 0 580 67811 0 ICS 77.140.15; 91.080.40 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published und
4、er the authority of the Standards Policy and Strategy Committee on 31 January 2013.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 13270:2013 ISO 2013Steel fibres for concrete Definitions and specificationsFibres dacier pour bton Dfinitions et spcificationsINTERNATIONAL STANDAR
5、DISO13270First edition2013-01-15Reference numberISO 13270:2013(E)BS ISO 13270:2013ISO 13270:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any mean
6、s, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightis
7、o.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 13270:2013ISO 13270:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 24 Symbols 35 Classification 36 Ordering information 47 Requirements 47.1 Dimensions and tolerances 47.2
8、 Surface condition 57.3 Tensile strength of fibres 67.4 Modulus of elasticity 67.5 Bending requirements 67.6 Mixing . 67.7 Reinforcing effect of the steel fibres in concrete 67.8 Effect on consistency of concrete 77.9 Effect on air of concrete. 78 Testing and Inspection . 78.1 General . 78.2 ITT (In
9、itial Type Test) . 78.3 Factory production control (FPC) . 89 Packaging and package marking 11Annex A (normative) Reference concretes 13Bibliography .17BS ISO 13270:2013ISO 13270:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards b
10、odies (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 organizati
11、ons, 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
12、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
13、 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, Subcommi
14、ttee SC 17, Steel wire rod and wire products.iv ISO 2013 All rights reservedBS ISO 13270:2013INTERNATIONAL STANDARD ISO 13270:2013(E)Steel fibres for concrete Definitions and specifications1 ScopeThis International Standard specifies definitions and symbols, classification and codes, dimensions, mas
15、ses 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 rep
16、air concretesThis 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 referencesThe following referenced documents are indispensable for the application of this docume
17、nt. 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 requirementsISO 1920-2:2005, Testing of concrete Part 2: Properties of fresh
18、 concreteISO 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 methodISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperatureISO
19、7989-1, Steel wire and wire products Non-ferrous metallic coatings on steel wire Part 1: General principlesISO 10474, Metallic products Inspection documentsISO 22034-1, Steel wire and wire products Part 1: General test methodsEN 197-1:2011, Cement Part 1: Composition, specifications and conformity c
20、riteria for common cementsEN 206-1, Concrete Part 1: Specification, performance,production and conformityEN 933-2, Tests for geometrical properties of aggregates Part 2: Determination of particle size distribution Test sieves, nominal size of aperturesEN 934-2:2009, Admixtures for concrete. mortar a
21、nd grout Part 2: Concrete admixtures Definitions. requirements, conformity, marking and labelingEN 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 concre
22、teEN 1766:2000, Products and systems for the protection and repair of concrete structures Test methods Reference concretes for testingEN 1992-1-1, Eurocode 2: Design of concrete structures Part 1-1: General rules and rules for buildingsEN 12350-1, Testing fresh concrete Part 1: SamplingEN 12350-3, T
23、esting fresh concrete Part 3: Vebe test ISO 2013 All rights reserved 1BS ISO 13270:2013ISO 13270:2013(E)EN 12350-4, Testing fresh concrete Part 4: Degree of compactabilityEN 14651, Test method for metallic fibre concrete Measuring the flexural tensile strength (limit of proportionality (LOP). residu
24、al)EN 14845-2, Test methods for fibres in concrete Part 2: Effect on concrete3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1steel fibresstraight or deformed pieces of cold-drawn steel wire, straight or deformed cut sheet fibres, melt-extracted
25、fibres, shaved cold-drawn wire fibres and fibres milled from steel blocks which are suitable to be homogenously mixed into concrete or mortarNote 1 to entry: Steel fibres are suitable reinforcement material for concrete because they possess a thermal expansion coefficient equal to that of concrete,
26、their Youngs 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.3.2lengthdistance between the outer ends of the fibre3.2.1developed lengthlength of the deformed fibres after straightening the fibre without deforming the cr
27、oss-section3.3equivalent diameterdiameter of a circle with an area equal to the mean cross-sectional area of the fibreNote 1 to entry: For circular fibres, the equivalent diameter is equal to the diameter of the fibres.3.4aspect ratioratio of length (l) to equivalent diameter of the fibre3.5fibre sh
28、apespecific 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 fibres3.6tensile strength of fibrestress corresponding to the maximum force that one fibre can resistNote 1 to entry: The
29、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.3.7crack mouth opening displacementCMODlinear displacement measured by a transducer install
30、ed on a prism subjected to a centre-point load F3.8elastic modulusinitial slope of the tensile stress versus tensile strain curve2 ISO 2013 All rights reservedBS ISO 13270:2013ISO 13270:2013(E)3.9declared valuevalue for a product property, determined in accordance with this standard, that a manufact
31、urer is confident of achieving within the given tolerances taking into account the variability of the manufacturing process3.10linear displacementdisplacement measured by a transducer installed on a prism subjected to a centre-point load F3.11residual flexural strengthnotional stress at the tip of t
32、he 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 CMOD; or to j where j FL( j = 1,2,3,4)Note 1 to entry: FLis the load at LOP (see EN 14651).4 SymbolsFor the purposes
33、 of this document, the symbols and definitions in Table 1 apply.Table 1 Symbols and definitionsSymbols Definitions Unitwawidth of the fibre mmtathickness of the fibre mmd diameter or equivalent diameter of the fibre mmRmtensile strength of the fibre MPal length of the fibre mm aspect ratio of the fi
34、bre ( = l/d)lddeveloped length of the fibre mmm mass of the fibre g density of steel kg/m3aDescription for rectangular fibres.5 ClassificationThe steel fibres shall conform to one of the groups and one of the shapes listed below:a) GroupSteel fibres shall be classified into one of the following grou
35、ps, in accordance with the basic material used for the production of the fibres.Group I: cold-drawn wireGroup II: cut sheetGroup III: melt extractedGroup IV: shaved cold-drawn wire ISO 2013 All rights reserved 3BS ISO 13270:2013ISO 13270:2013(E)Group V: milled from blocksb) ShapeFibres shall be eith
36、er 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) CoatingWhen steel fibres are supplied with a coating (e.g. zinc co
37、ating), the type and characteristic quantity in g/m2shall 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-
38、1. In the case of a Zn or Zn/Al coating, a protection against the alkaline environment is recommended (passivation).6 Ordering informationThe purchaser shall clearly provide the following information concerning the product in his enquiry or order:a) the desired quantity;b) the number of this Interna
39、tional Standard;c) group, shape, coating if any, class A, class B for Group I and nominal tensile strength ;d) diameter or equivalent diameter;e) length;f) the type of inspection document;g) for stainless steel fibres, the steel grade shall be agreed at the time of ordering.7 Requirements7.1 Dimensi
40、ons and tolerances7.1.1 GeneralFor fibres of group I and II, the length, equivalent diameter, the class (A or B), and the aspect ratio shall be declared. The tolerances shall be as given in Table 2.Specimens of fibres, when sampled in accordance with 8.2 and 8.3, and measured in accordance with 7.1.
41、2 and 7.1.3, shall not deviate from the declared value by more than the tolerances given in Table 2. At least 95 % of the individual specimens shall meet the specified tolerances.For fibres of group III, IV and V, the range of lengths, equivalent diameters and aspect ratios shall be declared. Specim
42、ens of fibres, when sampled in accordance with 8.2 and measured in accordance with 7.1.2 e 7.1.3 shall be within the specified range. At least 90 % of the individual specimen fibres shall meet the specified tolerances in both cases.4 ISO 2013 All rights reservedBS ISO 13270:2013ISO 13270:2013(E)Tabl
43、e 2 Tolerances on fibre length and diameterProperty RangeDeviation of the individual value relative to the declared valueDeviation of the average value relative to the declared valueClass A Class B Class A Class BLength and devel-oped length l (or ld)30 mm 30 mm3 mm 10 %10 %5 % 1,5 mm(Equivalent) di
44、am-eter d0,30 mm 0,30 mm0,02 mm 10 % 0,0155 % 0,015 mmLength/diameter ratio 15 % 7,5 %7.1.2 Determination of lengthThe length shall be measured with a marking gauge (callipers) with an accuracy of 0,1 mm.In the case of an irregular cross-section, the developed length of the fibre shall also be deter
45、mined to calculate the equivalent diameter. If straightening of the fibre is necessary, it shall be done by hand or, if this is not possible, by hammering on a level of wood, plastic material or copper using a hammer of similar material. During the straightening, the cross-section should not be chan
46、ged.7.1.3 Determination of (equivalent) diameter7.1.3.1 Round wire fibresThe diameter of the fibre shall be measured with a micrometer, in two directions, approximately at right angles, to an accuracy of 0,01 mm. The fibre diameter shall be the mean of the two diameters.7.1.3.2 Rectangular fibresThe
47、 width (w) and thickness (t) of the fibres shall be measured with a micrometer with an accuracy of 0,01 mm.The equivalent diameter (d) is calculated using the following formula:dwt=4pi7.1.3.3 Fibres with irregular cross-sectionThe mass (m) and the developed length (ld) of the fibre shall be determin
48、ed. The mass shall be determined to an accuracy of 0,001 g. The equivalent diameter is computed from the mass and the developed length using the following formula:dml=4160dpi Where is the nominal density: for all steels except stainless steel, it may be taken as 7850 kg/m3; for stainless steel, it m
49、ay be taken as 7950 kg/m3.”7.2 Surface conditionThe surface of fibre should be kept dry and clean, with no greasy dirt substances and inclusions existing which may effect the consistence behaviour of steel-fibre concrete. ISO 2013 All rights reserved 5BS ISO 13270:2013ISO 13270:2013(E)Seams and surface irregularities shall not be the cause for rejection, provided that tensile properties are not less than the requirements of this specification and mixing performance in
