ISO/TS 16774-3:2023

TECHNICAL ISO/TS
SPECIFICATION 16774-3
Second edition
2023-04
Test methods for repair materials for
water-leakage cracks in underground
concrete structures —
Part 3:
Test method for water (wash out)
resistance
Méthodes d'essai pour matériaux de réparation pour fissures dues à
l'eau dans les structures en béton souterraines —
Partie 3: Méthode d'essai de la résistance à l'eau (de lixiviation)
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
6 Preparation . 2
6.1 Test specimens. 2
6.2 Ambient conditions. 2
7 Procedure .2
8 Expression 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 . 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
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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
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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 16774-3:2016) which has been
technically revised.
The main changes are as follows:
— ambient conditions in 6.2 and A.3.2 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 references 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 16774-3:2023(E)
Test methods for repair materials for water-leakage cracks
in underground concrete structures —
Part 3:
Test method for water (wash out) resistance
1 Scope
This document specifies a laboratory test method on the quantitative determination of repair materials
performance and resistance against erosion and wash out due to underground water flow.
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.
[SOURCE: ISO/TS 16774-2:2023, 3.1]
4 Principle
Resistance to water flow is one of the fundamental properties that water leakage repair materials
should possess. Repair materials are, in most cases, under constant pressure due to water flow, meaning
there are risks of erosion, and/or washout and eventual reopening of leakage paths. This test method
evaluates the performance of repair materials for water-leakage cracks by observing how closely the
materials can maintain their original state after being exposed to long term water flow. This is done by
comparing the mass difference of water leakage repair materials before and after flow testing in order
to determine the repair material’s wash out resistance. An example test method is provided in Annex A.
The test repair material is placed in a Petri dish container, which is then placed under exposure to water
flow for predetermined duration in a water flow chamber apparatus (flow velocity, duration of flow
testing and other relevant conditions are subject to change in accordance with regulated values and
figures outlined in different national standards). The mass of the test specimen prior to and after the
exposure to water flow is measured using an electronic scale and the data is recorded. For the purpose
of this test, specimens should try to retain its original mass as closely as possible as an indicator of
strong physical resistance against water flow.
5 Apparatus
5.1 Water flow chamber, shall be able to maintain and control a constant velocity of water flow.
Water flow velocity can be set in accordance with the relevant environmental condition of the
appropriate national standard.
5.2 Others
5.2.1 Glass Petri dish for repair material placement and water flow chamber testing.
5.2.2 Electronic scale, capable of measuring up to two decimal places in grams.
5.2.3 Stirring rod and trowel used for material placement in the Petri dish.
5.2.4 Injector, injection method shall be as close as possible to manufacturer instructions if provided.
5.2.5 Non-woven fabric cloth, filters eroded particulates that are washed out during flow testing.
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 injection material, such method should be
used instead.
b) Cure the test specimens in the test room for predetermined number of hours or days until it dries
to constant mass with +/- tolerance. Tolerance range conditions should conform to the relevant
national standard testing methods.
c) Prepare a set number of specimens for test repetition.
6.2 Ambient conditions
Keep the test room at temperature (22 ± 2) °C and humidity at (55 ± 5) % during the experiment unless
specifically required otherwise. Standard drying conditions of a drying shrinkage state conditions
should be as outlined in ISO 1920-8.
NOTE Temperature values are subject to change according to different national standards. Examples include
warmer countries with ranges that can reach up to (27 ± 2) °C and colder countries at (16 ± 3) °C, etc. The same
applies to humidity conditions.
7 Procedure
a) Record the condition of specimen surface placed in the Petri dish. Measure and record the mass
(Mb, mass of specimen before water flow exposure) of the test specimens (up to two decimal places
in grams). Cover the surface with non-woven fabric to act as a filter for eroded particulates. When
covering the specimen with the non-w
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