ISO 20152-1:2010
(Main)Timber structures — Bond performance of adhesives — Part 1: Basic requirements
Timber structures — Bond performance of adhesives — Part 1: Basic requirements
ISO 20152-1:2010 specifies the basic performance requirements for adhesives used to bond structural timber components. These requirements depend upon the service conditions according to Service Classes 1, 2 and 3, defined therein.
Structures en bois — Performance d'adhérence des adhésifs — Partie 1: Exigences de base
General Information
Relations
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 20152-1
First edition
2010-08-01
Timber structures — Bond performance
of adhesives —
Part 1:
Basic requirements
Structures en bois — Performance d'adhérence des adhésifs —
Partie 1: Exigences de base
Reference number
©
ISO 2010
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO 2010
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2010 – All rights reserved
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Application .2
5 Requirements.3
5.1 Adhesive details, mixing and application.3
5.2 Anti-fungal properties .3
5.3 Acid damage to wood fibre.3
5.4 Shear strength and wood failure .3
5.5 Delamination resistance .5
5.6 Creep resistance.6
6 Sample preparation and test methods .6
6.1 Anti-fungal properties .6
6.2 Acid damage to wood fibre.6
6.3 Specimen requirements.6
6.4 Wood moisture content .7
6.5 Shear test and wood failure assessment.7
6.6 Delamination resistance test.11
6.7 Creep resistance test .12
7 Adhesive sample .22
8 Rejection.22
9 Reporting.22
9.1 General .22
9.2 Product description.22
9.3 Specimen preparation and testing .23
9.4 Test results .24
Annex A (normative) Interrupting the boil–dry-freeze conditioning.25
Annex B (normative) Measurement and computation of bond line creep for environmental test
conditions A, B and C .26
Bibliography.27
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 20152-1 was prepared by Technical Committee ISO/TC 165, Timber structures.
ISO 20152 consists of the following parts, under the general title Timber structures — Bond performance of
adhesives:
⎯ Part 1: Basic requirements
⎯ Part 2: Additional requirements
iv © ISO 2010 – All rights reserved
Introduction
ISO 20152 has been developed by ISO/TC 165 to provide performance requirements for adhesive bond lines
formed in structural wood products. It is largely based on the Canadian Standards Association's
[1] [2]
CSA O112.9 and CSA O112.10 . These CSA-based tests for resistance to shear in the dry and wet states,
resistance to delamination during exposure to wetting and drying, and resistance to creep static shear loading
during exposure to high humidity, heat and combined heat and moisture are designated as Method A. An
alternative “pathway” to the provisions has been provided by equivalent provisions of CEN (European
Committee for Standardization) standards, designated as Method B. Both the CSA and CEN standards
evaluate adhesive bonds against standardized wood species having tightly prescribed specific gravities.
ISO/TC 165 is nevertheless aware that North American and European species are not readily available in
many other countries. Future revisions of ISO 20152 are expected to include evaluations of bond line
performance made against other species having alternative specific gravities, provided evidence is produced
to show that such evaluations produce equivalent results.
ISO 20152 consists of two parts: this part gives minimum requirements for adhesive bonds in all jurisdictions;
ISO 20152-2 gives requirements that are specified by building regulatory authorities (high temperature
performance at or above 180 °C) in other jurisdictions or for specific applications (gap-filling performance).
In the above-mentioned Canadian standards, normative reference is made to a number of other documents,
which means that they (and a standard based on them) could not be used independently of those documents.
Such references have been replaced wherever possible in this part of ISO 20152 without unduly lengthening
the text. Because International Standards in the wood products area are not extensive, this has not been
practicable in all instances, and normative reference to CEN and ASTM (American Society for Testing and
Materials) standards has been retained. The ASTM references, for example, apply only to adhesive bond
requirements that are less likely to be specified or are rather lengthy.
The Method A provisions for adhesives provide assessments based on using tightly specified hardwood
and/or softwood substrates; the Method B provisions, on the other hand, are confined to the use of beech
substrates. The tests and provisions herein represent only a first stage of adhesive evaluation when
manufacturing an adhesively bonded structural wood product. It is anticipated that product standards will
specify qualification procedures that verify the capacity of the adhesive to produce effective wood bonds,
given the specific species and manufacturing processes involved. Within an international context, there are
many variations in species and manufacturing practices that cannot be taken into account in an adhesive
standard and thus case-by-case evaluations are essential.
Creep performance criteria and tests under elevated temperatures (180 °C) contained within CSA O112.9
have been removed. The matter was discussed within ISO/TC 165 and it was agreed that high temperature
performance (greater than 180 °C) is not a requirement in all jurisdictions. A number of countries do not
require the bond line itself to have a fire rating. Where a wood product (either protected or unprotected) is
required to have a fire rating for specific classes of building construction, the view is taken that it is the
structural assembly that must be evaluated by a national fire testing standard for assessment against national
building code requirements.
INTERNATIONAL STANDARD ISO 20152-1:2010(E)
Timber structures — Bond performance of adhesives —
Part 1:
Basic requirements
1 Scope
This part of ISO 20152 specifies the basic performance requirements for adhesives used to bond structural
timber components. These requirements depend upon the service conditions according to Service Classes 1,
2 and 3, as defined herein.
2 Normative references
The following referenced documents are indispensable for the application 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 3130, Wood — Determination of moisture content for physical and mechanical tests
EN 301, Adhesives, phenolic and aminoplastic, for load-bearing timber structures — Classification and
performance requirements
EN 302-1, Adhesives for load-bearing timber structures — Test methods — Part 1: Determination of bond
strength in longitudinal tensile shear strength
EN 302-2, Adhesives for load-bearing timber structures — Test methods — Part 2: Determination of
resistance to delamination
EN 302-3, Adhesives for load-bearing timber structures — Test methods — Part 3: Determination of the effect
of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength
EN 15416-2, Adhesives for load bearing timber structures other than phenolic and aminoplastic — Test
methods — Part 2: Static load test of multiple bondline specimens in compression shear
EN 15425, Adhesives — One component polyurethane, for load bearing timber structures — Classification
and performance requirements
ASTM D1583, Standard Test Method for Hydrogen Ion Concentration of Dry Adhesive Films
ASTM D3535, Standard Test Method for Resistance to Creep Under Static Loading for Structural Wood
Laminating Adhesives Used Under Exterior Exposure Conditions
ASTM D4300, Standard Test Methods for Ability of Adhesive Films to Support or Resist the Growth of Fungi
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
Service Class 1
service class characterized by a moisture content in the materials corresponding to a temperature of 20 °C
and a relative humidity of the surrounding air exceeding 65 % for a few weeks per year
NOTE In Service Class 1, the average equilibrium moisture content of most softwoods does not exceed 12 %.
3.2
Service Class 2
service class characterized by a moisture content in the materials corresp
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.