ISO/TS 16774-2:2023

TECHNICAL ISO/TS
SPECIFICATION 16774-2
Second edition
2023-04
Test methods for repair materials for
water-leakage cracks in underground
concrete structures —
Part 2:
Test method for chemical resistance
Méthodes d'essai pour matériaux de réparation pour fissures dues à
l'eau dans les structures en béton souterraines —
Partie 2: Méthode d'essai de la résistance chimique
Reference number
© ISO 2023
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. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
5.1 Container . 2
5.2 Others . 2
6 Preparation . 2
6.1 Test specimens. 2
6.2 Chemical substance . 2
6.3 Ambient conditions. 3
7 Procedure .3
8 Expression of results . 3
9 Test report . 4
9.1 Information on the repair material of the test target . 4
9.1.1 General . 4
9.1.2 Other information . 4
9.2 Information on the test . 4
Annex A (informative) Example test method . 5
Bibliography . 8
iii
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 of the voluntary nature of standards, 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 71, Concrete, reinforced concrete and pre-
stressed concrete, Subcommittee SC 7, Maintenance and repair of concrete structures.
This second edition cancels and replaces the first edition (ISO/TS 16774-2:2016) which has been
technically revised.
The main changes are as follows:
— ambient conditions in 6.3 and A.3.3 have been modified;
— some clarifications have been made in Clause 7 and 9.2;
— some editorial corrections have been made.
A list of all parts in the ISO 16774 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
This document is linked to ISO/TR 16475. ISO/TR 16475 outlines six basic properties and the required
performance levels of water leakage repair materials, and the ISO/TS 16774 series proposes sample
testing methods that are capable of evaluating the respective properties of the repair materials.
The test methods in this document are intended to serve as a reference for nations that have not yet
developed a test method on the six required performance properties of water leakage repair materials.
If other forms of test methods that are simpler, more accurate or more organized are available, such
methods are recommended for use instead. Many of the dependent variables outlined in the reference
test methods of this document are subject to change in accordance with the environmental conditions
(temperature and humidity, chemical solution and concentration, width of movement activity, water
pressure or water flow velocity, etc.) outlined in the standards used in respective countries.
For ISO/TS 16774-1, ISO/TS 16774-5 and ISO/TS 16774-6, for the purpose of objectively comparing the
performance of injected repair materials, artificial cracks of same width, height, and volume were used
to control the usage of repair materials for each testing cycle and enable repetition of the same test
methods under the same conditions.
v
TECHNICAL SPECIFICATION ISO/TS 16774-2:2023(E)
Test methods for repair materials for water-leakage cracks
in underground concrete structures —
Part 2:
Test method for chemical resistance
1 Scope
This document specifies a laboratory test method for the qualitative determination of the retention
level of chemical resistance of repair materials in repaired cracks of concrete structures in conditions
where the material is either underwater or in contact with water that can have various chemical
components present.
2 Normative references
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/TR 16475, General practices for the repair of water-leakage cracks in concrete structures
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/TR 16475 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
water leakage repair material
grouting materials used to prevent water leakages in concrete cracks
Note 1 to entry: In this document, target ingredients are limited to injection materials outlined in ISO/TR 16475.
4 Principle
A repair material’s resistance to chemical attacks is one of the fundamental properties that water
leakage repair materials should possess. Repair materials can undergo chemical property changes due
to chemical attack. Harmful chemical substances can also corrode the repair material and reduce their
ability to prevent water leakage. This test method evaluates a water leakage repair material’s chemical
resistance performance by determining if the tested material can maintain as closely as possible its
original mass after being exposed to various types of chemical substances as a means to evaluate the
material’s resistance against chemical corrosion. In this method, comparing the mass difference of
water leakage repair materials before and after chemical exposure can be used to determine the repair
material’s chemical resistance level. An example test method is provided in Annex A.
The tested repair material sample prepared in a Petri dish is placed in a container and completely
immersed in chemical solutions for predetermined number of hours or days (values subject to change
in accordance with different national standards). The concentration of the tested chemical solution
follows the condition of the applied environment belonging to different national standards, meaning
test chemical substances that represent common chemical substances that are exposed to concrete
material and repair materials, as well as exposure time and chemical concentration range values should
reflect the applicable environmental conditions.
Test specimens are treated so that they remain in a stable state prior to immersion in chemical
substance so that physical factors such as swelling, pore-filling, or bub
...