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
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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
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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).
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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 bubbling do not affect the principles
of this test method. The mass of the test specimen after immersion in chemical substance is measured
using an electronic scale and the mass difference is recorded. Tested types of repair materials in this
document are limited to injection type water leakage repair materials.
5 Apparatus
5.1 Container
Any size of plastic or glass type of container used to contain the chemical solution and immerse the test
specimens (quality of the material of container, bowl, or dish being used should be made with materials
that are non-reactive to chemical substance).
5.2 Others
5.2.1 Glass testing dishes (Petri dish) and plate used to elevate the specimen above the floor of the
container.
5.2.2 Electronic scale, capable of measuring up to two decimal places in grams.
5.2.3 Stirring rod and trowel used for specimen placement into Petri dish.
5.2.4 Other types of injecting apparatus (optional).
6 Preparation
6.1 Test specimens
a) Completely fill the glass Petri dish with repair material.
Repair material surface should be treated with a trowel or other surface treating tools to make sure
the surface of the material is flat (tolerance for uneven surface allowed). Should there be a specific
instruction provided by the manufacturer on how to prepare/inject material, such method should be
used ins
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