ISO/TS 16774-5:2024

Technical
Specification
ISO/TS 16774-5
Second edition
Test methods for repair materials
2024-08
for water-leakage cracks in
underground concrete structures —
Part 5:
Test method for watertightness
Méthodes d'essai pour matériaux de réparation pour fissures
dues à l'eau dans les structures en béton —
Partie 5: Méthode d'essai de l'étanchéité à l'eau
Reference number
© ISO 2024
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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
6 Preparation . 2
6.1 Test specimen and artificial crack conditions .2
6.2 Ambient conditions.2
7 Procedure . 3
8 Presentation of results . 3
9 Test report . 3
9.1 Information on the repair material of the test target .3
9.1.1 General .3
9.1.2 Other information .3
9.2 Information on the test .4
Annex A (informative) Example test method . 5
Bibliography .15

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
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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 document 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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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 16774-5:2017), which has been technically
revised.
The main changes are as follows:
— in 6.1 a), a recommendation regarding the specification of the fine aggregate, as well as the necessary
reference to the relevant standard, has been added;
— in 6.1 d), the text has been revised to provide clearer context.
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; The ISO/TS 16774 series proposes sample testing
methods for evaluating the respective properties of the repair materials.
The test methods in this document are intended to serve as reference for nations that have not yet
developed a test method for the six required performance properties of water-leakage repair materials.
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.
In this document, ISO/TS 16774-1 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 are used to
control the usage of repair materials for each testing cycle and enable repetition of the same test methods
under the same conditions. In this document, target ingredients are limited to injection materials outlined
in ISO/TR 16475.
These permeability test procedures follow applied conditions outlined in different national testing
parameters and requirements. As such, the results are only intended to provide a comparative performance
evaluation of the waterproofing repair materials between different products of the same type of repair
material with the same environmental conditions.
NOTE 1 This test method classifies and categorizes materials that are tested into families of similar properties for
the purpose of making relative comparisons with the data results.
NOTE 2 Each individual repair material can be further tested in an actual construction site application for a
complete assessment.
v
Technical Specification ISO/TS 16774-5:2024(en)
Test methods for repair materials for water-leakage cracks in
underground concrete structures —
Part 5:
Test method for watertightness
1 Scope
This document specifies a laboratory test method for evaluating watertightness of water-leakage crack
repair materials through permeability testing.
This document outlines general principles and procedures for the test method. This document does not
specify specific variables that control the quantifiable parameters of the testing.
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
repair material
material used for preventing the escape of water at cracks in concrete
EXAMPLE Injection-type grouts, such as synthetic rubberized asphalt, mastic, urethane, poly-urea, etc.
4 Principle
Impermeability to water pressure is one of the fundamental properties of water-leakage repair materials.
Property changes in the repair material due to applied hydro-static pressure can influence the repair
material’s performance and lead to waterproofing failure. The test method in this document evaluates the
watertightness properties of repair materials injected into a test specimen with an artificial crack through
a permeability test (i.e. checking for leakage with a specified amount of water pressure), thereby assessing
the material’s performance with a qualitative method.

5 Apparatus
5.1 Air compressor, which should be able to handle minimum air pressure value of
2 2
0,1 N/mm to 0,3 N/mm .
5.2 Permeability test chamber, which should be able to handle minimum water pressure value of 0,1 N/
2 2
mm to 0,3 N/mm (output method).
NOTE Conditions outlined in 5.1 and 5.2 are subject to change in accordance with different national testing
parameters and requirements.
6 Preparation
6.1 Test specimen and artificial crack conditions
a) Two separate concrete or mortar substrate parts should be cured to form a water-leakage crack test
specimen. The parts consist of upper and bottom parts, and they should be flat and cylindrical in shape
and made using concrete or mortar.
The mix proportion is (water : cement : fine aggregate = 1 : 2 : 6, mass ratio). The fine aggregate used
should be specified. A different standard specification can apply.
NOTE 1 The curing period for the mortar or concrete substrate parts is approximately 72 h, but can change
according to different national testing parameters and requirements.
b) The bottom substrate is drilled with evenly spaced holes (Ø 2,5 mm) near the centre of the substrate.
The pinholes shall be drilled all the way through from one surface of the substrate part to the other.
NOTE 2 The purpose of these pinholes is to check for signs of leakage during repair material injection and
during permeability testing.
c) Spacers are placed on one surface of the bottom substrate part without covering the pinholes, and the
upper substrate part is placed on top of the spacers. The substrate parts, now having formed the test
specimen with the artificial crack, are held together with tape, silicone sealants or other applicable
materials along the exterior side. The spacer height represents the width of the crack and can vary
depending on the different national testing parameters and requirements.
Any material can be used to hold the two substrate parts together with a crack space in between, but an
inlet should
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