ISO/DIS 13182:2025(en)

ISO/TC 71/SC 6

Secretariat: JISC

Date: 2025-01-27

Classification for discrete polymer fibre for fibre-reinforced cementitious composites

Document stage: Draft International Standard

Document language: E

Élément introductif — Élément principal — Partie n: Titre de la partie

© ISO 2025

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester.

ISO Copyright Office

CP 401 • CH-1214 Vernier, Geneva

Phone: + 41 22 749 01 11

Email: copyright@iso.org

Website: www.iso.org

Published in Switzerland.

Contents page

Foreword 3

1 Scope 3

2 Normative references 4

3 Terms and definitions 4

3.1 Fibre-reinforced cementitious composite (FRCC) 4

3.2 Others 4

4 Symbols 4

5 Classification 4

5.1 General 4

5.2 Fibre type 4

5.3 Cross-sectional shape 5

5.4 Longitudinal Shape 5

5.5 Bundle 6

5.6 Classification of the quality and performance 6

6 Test methods for fibre parameters 7

6.1 Fibre diameter 7

6.2 Fibre length 7

6.3 Tensile strength 7

6.4 Initial Modulus of Elasticity 8

7 Notation of the Fibre Classification 8

7.1 Notation method 8

7.2 Notation items 8

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.

The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.

The committee responsible for this document is ISO/TC 71, Concrete, reinforced concrete and pre-stressed concrete, Subcommittee SC 6, Non-traditional reinforcing materials for concrete structures.

Classification for discrete polymer fibre for fibre-reinforced cementitious composites

This standard specifies discrete polymer fibres with a nominal length of 80 mm or less mixed in concrete and mortar. The quality and performance specified in this standard are the raw material resin of discrete polymer fibres, nominal fibre diameter and its allowable range, nominal fibre length and its allowable range, fibre cross-sectional shape, fibre longitudinal shape, grade of fibre strength, and grade of fibre elasticity.

There are a wide variety of discrete polymer fibres used to reinforce cement composites. Currently, in discrete polymer fibres products distributed as industrial products, there are many types of raw material resins and various shapes. In addition, the applications that have been used in practical fields are so wide, from structural applications that require high mechanical reinforcement performance to crack control and peeling prevention that are easier to use. Therefore, to select an appropriate product from a wide variety of discrete polymer fibres, the characteristics of discrete polymer fibres should be classified and revealed based on a unified evaluation method. This standard allows manufacturers of discrete polymer fibres to provide the performance according to an adequate standard in response to various user requests.

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.

ISO 23523, Test methods for discrete polymer fibre for fibre-reinforced cementitious composites

For the purposes of this document, the following terms and definitions 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 http://www.iso.org/obp

3.1 Fibre-reinforced cementitious composite (FRCC)

concrete or mortar containing short discrete fibres that are distributed in the matrix

3.2 Others

See Table 1.

Table 1— Symbols

The classification of the fibres consists of raw materials, cross-sectional properties, longitudinal properties, tensile strength, and elastic modulus.

The fibre type shall be presented by the raw materials the fibre. These symbols are shown in Table 2.

Table 2 — Fibre types

The fibre diameter and cross-sectional shape of the fibres are specified as the classification of the cross section of the fibres. The fibre diameter shall be indicated with the diameter of a circle with the same cross-sectional area.

Table 3 — Classification of nominal diameter

Table 4 — Cross-sectional shape of fibres

Figure 1 — Examples of cross-sectional shape of fibres

The longitudinal classifications of the fibre consist of the longitudinal shape and length.

Table 5 — Classification of Fibre length

Table 6 — Longitudinal shape of fibres

Figure 2 — Examples of Longitudinal shapes of fibres

Fibres that are bundled shall be labelled to bundled or not.

Table 7 — Bundle

The classification of fibre parameters consists of the tolerance for the nominal value of the fibre diameter, the tolerance for the nominal value of the fibre length, the tensile strength, and the initial modulus of elasticity.

Table 8 — Classification for the quality and performance of polymer fibre

The fibre diameter shall be determined in accordance to ISO 23523. And tolerance of the fibre diameter shall be estimated by the formula as follows;

where

The fibre length shall be determined in accordance to ISO 23523. And tolerance of the fibre length shall be estimated by the formula as follows;

where

The tensile strength of the fibre shall be determined in accordance to ISO 23523.

The initial modulus of elasticity of the fibre shall be determined in accordance to ISO 23523.

The classifications of the fibres are listed to the symbols in the order of raw material, cross-sectional characteristics and the classification of the fibre diameter tolerance, longitudinal characteristics and length tolerance classification, tensile strength classification, and elastic modulus classification. Add a hyphen for each category.

The notation shall include the following categories:

a) raw material;

b) fibre diameter class;

c) fibre cross-sectional shape;

d) fibre diameter tolerance class;

e) fibre length class;

f) fibre longitudinal shape;

g) fibre length tolerance class;

h) tensile strength grade;

i) initial modulus of elasticity grade;

For example, VY-Ca(II)-Sa(II)-F2-E2, see below;

Table 9 — Example of notation