SIST EN 301:2018
(Main)Adhesives, phenolic and aminoplastic, for load-bearing timber structures - Classification and performance requirements
Adhesives, phenolic and aminoplastic, for load-bearing timber structures - Classification and performance requirements
This European Standard establishes a classification for phenolic and aminoplastic polycondensation adhesives according to their suitability for use for load-bearing timber structures in defined climatic exposure conditions, and specifies performance requirements for such adhesives for the factory manufacture or factory-like manufacturing conditions of load-bearing timber structures only.
This European Standard only specifies the performance of an adhesive for use in an environment corresponding to the defined conditions.
The performance requirements of this European Standard apply to the adhesive only, not to the timber structure. This European Standard does not cover the performance of adhesives for on-site gluing (except for factory-like conditions) nor the production of wood-based panels, except solid wood panels, or modified and stabilized wood with considerably reduced swelling and shrinkage properties, e.g. such as acetylated wood, heat treated wood and polymer impregnated wood.
This European Standard is primarily intended for the use of adhesive manufacturers and for the use in timber structures bonded with adhesives, to assess or control the quality of adhesives. The requirements apply to the type testing of the adhesives. Production control activities are outside the scope of this European Standard.
Adhesives meeting the requirements of this European Standard are adequate for use in a load-bearing timber structure, provided that the bonding process has been carried out according to an appropriate product standard.
Klebstoffe, Phenoplaste und Aminoplaste, für tragende Holzbauteile - Klassifizierung und Leistungsanforderungen
Diese Europäische Norm stellt ein Klassifizierungssystem für Polykondensationsklebstoffe auf Phenoplast- und Aminoplastbasis entsprechend deren Eignung zum Einsatz für tragende Holzbauteile unter vorgegebenen Klimabedingungen auf und legt die Leistungsanforderungen an derartige Klebstoffe ausschließlich zur werks-mäßigen Herstellung oder Herstellung unter werksähnlichen Bedingungen von tragenden Holzbauteilen fest.
Diese Europäische Norm legt nur das Leistungsverhalten eines Klebstoffs für den Einsatz in einer Umgebung fest, die den festgelegten Bedingungen entspricht.
Die Leistungsanforderungen dieser Europäischen Norm gelten lediglich für den Klebstoff, nicht für das Holz-bauteil. Diese Europäische Norm behandelt weder das Leistungsverhalten von Klebstoffen für die Vor-Ort-Verklebung (ausgenommen bei werksähnlichen Bedingungen) noch die Produktion von Holzwerkstoffen, ausgenommen Massivholzplatten; sie gilt nicht für modifiziertes und vergütetes Holz mit beträchtlich verrin¬gerten Quellungs- und Schwindungseigenschaften, wie z. B. acetyliertes Holz, wärmebehandeltes Holz und mit Kunstharz imprägniertes Holz.
Diese Europäische Norm ist im Wesentlichen für den Einsatz durch die Hersteller der Klebstoffe und zur Beurteilung oder Überprüfung der Qualität der Klebstoffe bei verklebten Holzbauteilen vorgesehen. Die Anfor-derungen gelten für die Typprüfung von Klebstoffen. Aktivitäten hinsichtlich der Produktionskontrolle gehören nicht zum Anwendungsbereich dieser Europäischen Norm.
Klebstoffe, die die Anforderungen dieser Europäischen Norm erfüllen, sind für den Einsatz in tragenden Holz-bauteilen geeignet, vorausgesetzt, dass der Verklebungsvorgang nach einer entsprechenden Produktnorm vorgenommen wurde.
Adhésifs de nature phénolique et aminoplaste, pour structures portantes en bois - Classification et exigences de performance
La présente Norme européenne établit une classification des adhésifs de polycondensation de type phénolique ou aminoplaste en fonction de leur aptitude à l'emploi dans les structures portantes en bois dans des conditions d'exposition climatique définies ; elle spécifie les exigences de performance applicables à ces adhésifs uniquement lorsqu'ils sont utilisés pour la fabrication en usine de structures portantes en bois, ou dans des conditions similaires à la fabrication en usine.
La présente Norme européenne spécifie les performances de l'adhésif uniquement lorsqu'il est utilisé dans un environnement correspondant aux conditions définies.
Les exigences de performance de la présente Norme européenne ne s'appliquent qu'à l'adhésif ; elles ne s'appliquent pas à la structure en bois. La présente Norme européenne n'a pas pour objet la performance des adhésifs utilisés pour le collage sur site (à l'exception des conditions similaires à la fabrication en usine) ou pour la fabrication de panneaux à base de bois, à l'exception des panneaux en bois massif, ou pour le bois modifié et stabilisé ayant une propension considérablement réduite au gonflement et au rétrécissement, comme par exemple le bois acétylé, le bois traité à la chaleur et le bois imprégné de polymère.
La présente Norme européenne s'adresse avant tout aux fabricants d'adhésifs pour leur permettre, dans le domaine des structures en bois collées, d'évaluer ou de contrôler la qualité des adhésifs. Les exigences s’appliquent aux essais de type des adhésifs. Les activités de contrôle de la production ne relèvent pas du domaine d’application de la présente Norme européenne.
Un adhésif répondant aux exigences définies dans la présente Norme européenne se comportera de manière satisfaisante dans une structure portante en bois, pour autant que les opérations de collage aient été effectuées en référence à une norme de produit appropriée.
Lepila na osnovi fenolov in aminoplastov za nosilne lesene konstrukcije - Razvrstitev in zahteve za delovanje
Ta evropski standard vzpostavlja razvrstitev za fenolna in aminoplastna polikondenzacijska lepila v skladu z njihovo primernostjo za uporabo pri nosilnih lesenih konstrukcijah pri določenih pogojih izpostavljenosti podnebnim razmeram ter določa zahtevane lastnosti za taka lepila za tovarniško proizvodnjo ali tovarniškim pogojem podobne proizvodne pogoje samo za nosilne lesene konstrukcije.
Ta evropski standard določa učinkovitost lepila izključno za uporabo v okolju, ki ustreza podanim pogojem.
Zahtevane lastnosti iz tega evropskega standarda se uporabljajo samo za lepilo in ne za lesene konstrukcije. Ta evropski standard ne zajema lastnosti lepil za lepljenje na mestu uporabe (razen v pogojih, podobnih tovarniškim) niti proizvodnje lesnih plošč, razen trdnih lesnih plošč, ali obdelanega in stabiliziranega lesa, ki bistveno manj nabreka in se krči, kot je acetiliran les, toplotno obdelan les ali polimerno impregniran les.
Ta evropski standard je namenjen predvsem za proizvajalce lepil in za uporabo pri lesenih konstrukcijah, vezanih z lepili, in sicer za ocenjevanje ali nadzor kakovosti lepil. Zahteve se uporabljajo za tipsko preskušanje lepil. Dejavnosti kontrole proizvodnje ne spadajo na področje uporabe tega evropskega standarda.
Lepila, ki izpolnjujejo zahteve tega evropskega standarda, so primerna za uporabo pri nosilnih lesenih konstrukcijah pod pogojem, da je bil postopek vezave izveden v skladu z ustreznim standardom za proizvod.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 301:2018
01-februar-2018
1DGRPHãþD
SIST EN 301:2014
Lepila na osnovi fenolov in aminoplastov za nosilne lesene konstrukcije -
Razvrstitev in zahteve za delovanje
Adhesives, phenolic and aminoplastic, for load-bearing timber structures - Classification
and performance requirements
Klebstoffe, Phenoplaste und Aminoplaste, für tragende Holzbauteile - Klassifizierung und
Leistungsanforderungen
Adhésifs de nature phénolique et aminoplaste, pour structures portantes en bois -
Classification et exigences de performance
Ta slovenski standard je istoveten z: EN 301:2017
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
SIST EN 301:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 301:2018
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SIST EN 301:2018
EN 301
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2017
EUROPÄISCHE NORM
ICS 83.180 Supersedes EN 301:2013
English Version
Adhesives, phenolic and aminoplastic, for load-bearing
timber structures - Classification and performance
requirements
Adhésifs de nature phénolique et aminoplaste, pour Klebstoffe, Phenoplaste und Aminoplaste, für tragende
structures portantes en bois - Classification et Holzbauteile - Klassifizierung und
exigences de performance Leistungsanforderungen
This European Standard was approved by CEN on 16 July 2017.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 301:2017 E
worldwide for CEN national Members.
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SIST EN 301:2018
EN 301:2017 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Classification . 7
5 Requirements . 10
5.1 General . 10
5.2 Tensile shear test . 11
5.3 Delamination test . 12
5.4 Fibre damage test . 12
5.5 Shrinkage test . 13
5.6 Static load test . 13
5.7 Type testing of separate application finger joint adhesive . 13
6 Working properties of the adhesive . 13
6.1 General . 13
6.2 Physical properties of adhesive prepared for use . 14
6.3 Use of the adhesive . 14
7 Marking and labelling . 14
Annex A (normative) Delamination test for finger joints with separate spread of adhesive
and hardener . 15
A.1 Production of the specimens . 15
A.2 Testing . 15
A.3 Expression of results . 16
Bibliography . 17
2
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SIST EN 301:2018
EN 301:2017 (E)
European foreword
This document (EN 301:2017) has been prepared by Technical Committee CEN/TC 193 “Adhesives”,
the secretariat of which is held by UNE.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2018, and conflicting national standards shall be
withdrawn at the latest by May 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 301:2013.
Compared to EN 301:2013 the following changes have been made:
a) EN 15416-2 is replaced by EN 302-8, Adhesives for load-bearing timber structures — Test methods -
Part 8: Static load test of multiple bond line specimens in compression shear;
b) adhesives tested for working properties according to Clause 6 will be marked with a “w” in the end
of their designation code;
c) provisions for delamination tests on preservative treated softwood, hardwood and other conifers
species;
d) provisions for what to test when systems are used with a range of hardener dosage;
e) provisions for small modifications of already tested adhesives;
f) a new Clause 7 – Marking and labelling has been introduced;
g) Annex A: Delamination test for finger joints more precisely described;
h) Annex A: Expression of results included.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
3
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SIST EN 301:2018
EN 301:2017 (E)
Introduction
This document is one of a series of standards dealing with phenolic and aminoplastic adhesives for use
with timber structures, and is published in support of product standards for load-bearing timber
structures in connection with EN 1995-1-1 Eurocode 5: Design of timber structures - Part 1-1: General –
Common rules and rules for buildings. The series consists of one standard for classification and
performance requirements (EN 301), five test methods (EN 302-1, EN 302-2, EN 302-3 and EN 302-4
and EN 302-8) used to assess the performance of adhesives after specified heat and humidity
treatments, and three test methods (EN 302-5, EN 302-6 and EN 302-7) to characterize the working
properties of the adhesive.
SAFETY STATEMENT
Persons using this document should be familiar with the normal laboratory practice, if applicable. This
document cannot address all of the safety problems, if any, associated with its use. It is the
responsibility of the user to establish appropriate safety and health practices and to ensure compliance
with any regulatory conditions.
ENVIRONMENTAL STATEMENT
It is understood that some of the material permitted in this standard may have a negative
environmental impact. As technological advantages lead to acceptable alternatives for these materials,
they will be eliminated from this standard to the greatest extent possible.
At the end of the test, the user of the standard should take care to carry out an appropriate disposal of
the wastes, according to local regulations.
4
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SIST EN 301:2018
EN 301:2017 (E)
1 Scope
This European Standard establishes a classification for phenolic and aminoplastic polycondensation
adhesives according to their suitability for use for load-bearing timber structures in defined climatic
exposure conditions, and specifies performance requirements for such adhesives for the factory
manufacture or factory-like manufacturing conditions of load-bearing timber structures only.
This European Standard only specifies the performance of an adhesive for use in an environment
corresponding to the defined conditions.
The performance requirements of this European Standard apply to the adhesive only, not to the timber
structure. This European Standard does not cover the performance of adhesives for on-site gluing
(except for factory-like conditions) nor the production of wood-based panels, except solid wood panels,
or modified and stabilized wood with considerably reduced swelling and shrinkage properties, e.g. such
as acetylated wood, heat treated wood and polymer impregnated wood.
This European Standard is primarily intended for the use of adhesive manufacturers and for the use in
timber structures bonded with adhesives, to assess or control the quality of adhesives. The
requirements apply to the type testing of the adhesives. Production control activities are outside the
scope of this European Standard.
Adhesives meeting the requirements of this European Standard are adequate for use in a load-bearing
timber structure, provided that the bonding process has been carried out according to an appropriate
product standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 302-1, Adhesives for load-bearing timber structures - Test methods - Part 1: Determination of
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 302-4, Adhesives for load-bearing timber structures - Test methods - Part 4: Determination of the
effects of wood shrinkage on the shear strength
EN 302-8, Adhesives for load-bearing timber structures - Test methods - Part 8: Static load test of multiple
bond line specimens in compression shear
EN 408, Timber structures Structural timber and glued laminated timber Determination of some physical
and mechanical properties
EN 923, Adhesives - Terms and definitions
EN 1245, Adhesives - Determination of pH
EN 1995-1-1:2004, Eurocode 5: Design of timber structures - Part 1-1: General - Common rules and rules
for buildings
5
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SIST EN 301:2018
EN 301:2017 (E)
EN 12092, Adhesives - Determination of viscosity
EN 13183-2, Moisture content of a piece of sawn timber - Part 2: Estimation by electrical resistance
method
EN 13183-3, Moisture content of a piece of sawn timber - Part 3: Estimation by capacitance method
EN 14080, Timber structures - Glued laminated timber and glued solid timber - Requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 923 and the following apply.
3.1
aminoplastic resin
thermosetting synthetic resin derived from a condensation reaction of the –NH groups or –NH2 groups
of amines or amides with aldehydes
3.2
phenolic resin
thermosetting synthetic resin derived from a condensation reaction of a phenol with an aldehyde
3.3
polycondensation adhesive
adhesive mixture made from a resin formed by a polymerisation reaction involving the elimination of
water, usually with a hardener
Note 1 to entry: Such adhesives usually also contain extenders and/or fillers.
3.4
service class 1
climatic conditions characterised by a moisture content in the materials corresponding to a
temperature of 20 °C and the relative humidity of the surrounding air only exceeding 65 % for a few
weeks per year
Note 1 to entry: In service class 1, which comprises typical indoor conditions, the average moisture content in
most softwoods will not exceed 12 %.
[SOURCE: EN 1995-1-1:2004, 2.3.1.3]
3.5
service class 2
climatic conditions characterised by a moisture content in the materials corresponding to a
temperature of 20 °C and the relative humidity of the surrounding air only exceeding 85 % for a few
weeks per year
Note 1 to entry: In service class 2, to which most covered exterior conditions belong, the average moisture
content in most softwoods will not exceed 20 %.
[SOURCE: EN 1995-1-1:2004, 2.3.1.3]
6
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SIST EN 301:2018
EN 301:2017 (E)
3.6
service class 3
climatic conditions leading to higher moisture contents than in service class 2
Note 1to entry: Exterior conditions typically belong to service class 3.
[SOURCE: EN 1995-1-1:2004, 2.3.1.3, modified – Note 1 to entry has been added.]
3.7
glue line
adhesive layer between the wood members
3.8
thick glue line
glue line of nominal thickness in the range of 0,3 mm to 2,0 mm at the time of bonding
Note 1 to entry: Thick glue lines are achieved by using spacers, grooves or similar devices with a thickness of
0,3 mm to 2,0 mm when two plain members are glued together.
3.9
close contact glue line
glue line of thickness maximum 0,1 mm
Note 1 to entry: Close contact glue line is achieved by pressing together two plane wood members with a
2
clamping pressure of (0,8 ± 0,1) N/ mm without grooves, spacers or similar devices.
4 Classification
Adhesives (general purpose, finger jointing or gap filling) for structural purposes shall produce joints of
such strength and durability that the integrity of the bond is maintained in the assigned service class
throughout the expected life of the structure.
Two types of adhesive, I and II, are classified according to their suitability for use in different climatic
conditions:
— Type Ι to be used in service classes 1, 2 and 3 (EN 1995-1-1:2004);
— Type ΙΙ to be used in service class 1 only.
NOTE The application of the adhesive types in the different service classes can be restricted by national
regulations applicable at the end use site of the bonded timber structure.
These two types of adhesive are further divided into three subclasses according to the end use:
— General-purpose adhesive (GP) to be used for glue lines between laminations, for finger joints in
laminations and structural timber, and for large finger joints;
— Finger jointing adhesive (FJ) to be used for finger jointing of laminations and structural timber
only;
— Gap filling adhesive (GF) to be used for fibre parallel gluing, e.g. glue lines between glulam
components of block-glued glulam and for large finger joints. Gap filling adhesives can in addition
be classified as application type GP usable for glue lines between laminations and for finger jointing
of laminations and structural timber.
7
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SIST EN 301:2018
EN 301:2017 (E)
Table 1 specifies the thirteen adhesive classes for which this European Standard applies and their
designations. The designations consist of:
— type: Ι or ΙΙ;
— application: GP, FJ or GF;
— maximum test temperature in degrees Celsius: 70 or 90 for type Ι, or maximum use temperature in
degrees Celsius: 50 for type ΙΙ;
— use: M for mixed application, and S for separate application of adhesive and hardener.
Each application area and use shall be part of the designation.
EXAMPLE EN 301 I 70 GP 0,6M and EN 301 I 70 FJ 0,1S if classified as general purpose adhesive for mixed
application and classified as finger joint adhesive for separate application.
Table 1 — Adhesive classes
Adhesive type Application
Max. glue line
Max. test Service
thickness
Designation
c a
temp. classes
mm
°C Test Use
Face lamination and finger
jointing for general use
d
EN 301 I 70 GP 0,6M General purpose 70 1,0 0,6 1,2,3
EN 301 I 70 GP 0,3S General purpose 70 1,0 0,3 1,2,3
Speci
...
SLOVENSKI STANDARD
oSIST prEN 301:2015
01-september-2015
Lepila na osnovi fenolov in aminoplastov za nosilne lesene konstrukcije -
Razvrstitev in zahteve za delovanje
Adhesives, phenolic and aminoplastic, for load-bearing timber structures - Classification
and performance requirements
Klebstoffe, Phenoplaste und Aminoplaste, für tragende Holzbauteile - Klassifizierung und
Leistungsanforderungen
Adhésifs de nature phénolique et aminoplaste, pour structures portantes en bois -
Classification et exigences de performance
Ta slovenski standard je istoveten z: prEN 301 rev
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
oSIST prEN 301:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 301:2015
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oSIST prEN 301:2015
EUROPEAN STANDARD
DRAFT
prEN 301
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2015
ICS 83.180 Will supersede EN 301:2013
English Version
Adhesives, phenolic and aminoplastic, for load-bearing timber
structures - Classification and performance requirements
Adhésifs de nature phénolique et aminoplaste, pour Klebstoffe, Phenoplaste und Aminoplaste, für tragende
structures portantes en bois - Classification et exigences de Holzbauteile - Klassifizierung und Leistungsanforderungen
performance
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 193.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 301:2015 E
worldwide for CEN national Members.
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oSIST prEN 301:2015
prEN 301:2015 (E)
Contents Page
Foreword .3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Classification .7
5 Requirements .9
5.1 General .9
5.2 Tensile shear test. 11
5.3 Delamination test . 11
5.4 Fibre damage test . 12
5.5 Shrinkage test . 12
5.6 Static load test . 12
5.7 Type testing of separate application finger joint adhesive . 12
6 Working properties of the adhesive. 13
6.1 General . 13
6.2 Physical properties of adhesive prepared for use . 13
6.3 Use of the adhesive . 13
Annex A (normative) Delamination test for finger joints with separate spread of adhesive and
hardener . 14
A.1 Production of the specimens . 14
A.2 Testing . 14
A.3 Expression of results . 15
Bibliography . 16
2
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oSIST prEN 301:2015
prEN 301:2015 (E)
Foreword
This document (prEN 301:2015) has been prepared by Technical Committee CEN/TC 193 “Adhesives”, the
secretariat of which is held by AENOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 301:2013.
Compared to EN 301:2013 the following changes have been made:
a) provisions for delamination tests on preservative treated softwood and other conifers species;
b) provisions for what to test when systems are used with a range of hardener dosage;
c) provisions for small modifications of already approved adhesives;
d) delamination tests of hardwood and preservative treated wood added;
g) Annex A: Delamination test for finger joints more precisely described;
h) Annex A: Expression of results included.
3
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oSIST prEN 301:2015
prEN 301:2015 (E)
Introduction
This document is one of a series of standards dealing with phenolic and aminoplastic adhesives for use with
timber structures, and is published in support of product standards for load-bearing timber structures in
connection with EN 1995-1-1 Eurocode 5: Design of timber structures – Part 1-1: General – Common rules
and rules for buildings. The series consists of one standard for classification and performance requirements
(EN 301), five test methods (EN 302-1, EN 302-2, EN 302-3 and EN 302-4 and EN 15416-2) used to assess
the performance of adhesives after specified heat and humidity treatments, and three test methods (EN 302-5,
EN 302-6 and EN 302-7) to characterize the working properties of the adhesive.
SAFETY STATEMENT — Persons using this document should be familiar with the normal laboratory practice,
if applicable. This document does not purport to address all of the safety problems, if any, associated with its
use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure
compliance with any regulatory conditions.
ENVIRONMENTAL STATEMENT — It is understood that some of the material permitted in this standard may
have a negative environmental impact. As technological advantages lead to acceptable alternatives for these
materials, they will be eliminated from this standard to the greatest extent possible.
At the end of the test, the user of the standard should take care to carry out an appropriate disposal of the
wastes, according to local regulations.
4
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oSIST prEN 301:2015
prEN 301:2015 (E)
1 Scope
This European Standard establishes a classification for phenolic and aminoplastic polycondensation
adhesives according to their suitability for use for load-bearing timber structures in defined climatic exposure
conditions, and specifies performance requirements for such adhesives for the factory manufacture or factory-
like manufacturing conditions of load-bearing timber structures only.
This European Standard only specifies the performance of an adhesive for use in an environment
corresponding to the defined conditions.
The performance requirements of this European Standard apply to the adhesive only, not to the timber
structure. This European Standard does not cover the performance of adhesives for on-site gluing (except for
factory-like conditions) nor the production of wood-based panels, except solid wood panels, or modified and
stabilized wood with considerably reduced swelling and shrinkage properties, e.g. such as acetylated wood,
heat treated wood and polymer impregnated wood.
This European Standard is primarily intended for the use of adhesive manufacturers and for the use in timber
structures bonded with adhesives, to assess or control the quality of adhesives. The requirements apply to the
type testing of the adhesives. Production control activities are outside the scope of this European Standard.
Adhesives meeting the requirements of this European Standard are adequate for use in a load-bearing timber
structure, provided that the bonding process has been carried out according to an appropriate product
standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 302-1, Adhesives for load-bearing timber structures ― Test methods ― Part 1: Determination of
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 302-4, Adhesives for load-bearing timber structures ― Test methods ― Part 4: Determination of the
effects of wood shrinkage on the shear strength
EN 408, Timber structures ― Structural timber and glued laminated timber ― Determination of some physical
and mechanical properties
EN 923, Adhesives ― Terms and definitions
EN 1245, Adhesives ― Determination of pH
EN 1995-1-1, Eurocode 5: Design of timber structures ― Part 1-1: General ― Common rules and rules for
buildings
EN 12092, Adhesives ― Determination of viscosity
EN 13183-2, Moisture content of a piece of sawn timber ― Part 2: Estimation by electrical resistance method
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EN 13183-3, Moisture content of a piece of sawn timber ― Part 3: Estimation by capacitance method
EN 14080, Timber structures ― Glued laminated timber and glued solid timber ― Requirements
EN 15416-2:2007, 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 15425:2008, Adhesives ― One component polyurethane for load bearing timber structures ―
Classification and performance requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 923 and the following apply.
3.1
aminoplastic resin
thermosetting synthetic resin derived from a condensation reaction of the –NH groups or –NH groups of
2
amines or amides with aldehydes
3.2
phenolic resin
thermosetting synthetic resin derived from a condensation reaction of a phenol with an aldehyde
3.3
polycondensation adhesive
adhesive mixture made from a resin formed by a polymerisation reaction involving the elimination of water,
usually with a hardener
Note 1 to entry: Such adhesives usually also contain extenders and/or fillers.
3.4
service class 1
climatic conditions characterised by a moisture content in the materials corresponding to a temperature of
20 °C and the relative humidity of the surrounding air only exceeding 65 % for a few weeks per year
Note 1 to entry: In service class 1, which comprises typical indoor conditions, the average moisture content in most
softwoods will not exceed 12 %.
[SOURCE: EN 1995-1-1:2004, 2.3.1.3]
3.5
service class 2
climatic conditions characterised by a moisture content in the materials corresponding to a temperature of
20 °C and the relative humidity of the surrounding air only exceeding 85 % for a few weeks per year
Note 1 to entry: In service class 2, to which most covered exterior conditions belong, the average moisture content in
most softwoods will not exceed 20 %.
[SOURCE: EN 1995-1-1:2004, 2.3.1.3]
3.6
service class 3
climatic conditions leading to higher moisture contents than in service class 2
Note 1 to entry: Exterior conditions typically belong to service class 3.
[SOURCE: EN 1995-1-1:2004, 2.3.1.3, modified – Note 1 to entry has been added.]
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3.7
glue line
adhesive layer between the wood members
3.8
thick glue line
glue line of nominal thickness in the range of 0,3 mm to 2,0 mm at the time of bonding
Note 1 to entry: Thick glue lines are achieved by using spacers, grooves or similar devices with a thickness of 0,3 mm
to 2,0 mm when two plain members are glued together.
3.9
close contact glue line
glue line of thickness maximum 0,1 mm
Note 1 to entry: Close contact glue line is achieved by pressing together two plane wood members with a clamping
2
pressure of (0,8 ± 0,1) N/mm without grooves, spacers or similar devices.
4 Classification
Adhesives (general purpose, finger jointing or gap filling) for structural purposes shall produce joints of such
strength and durability that the integrity of the bond is maintained in the assigned service class throughout the
expected life of the structure.
Two types of adhesive, I and II, are classified according to their suitability for use in different climatic
conditions:
— Type Ι to be used in service classes 1, 2 and 3 (EN 1995-1-1);
— Type ΙΙ to be used in service class 1 only.
NOTE The application of the adhesive types in the different service classes can be restricted by national regulations
applicable at the end use site of the bonded timber structure.
These two types of adhesive are further divided into three subclasses according to the end use:
— General-purpose adhesive (GP) to be used for glue lines between laminations, for finger joints in
laminations and structural timber, and for large finger joints;
— Finger jointing adhesive (FJ) to be used for finger jointing of laminations and structural timber only;
— Gap filling adhesive (GF) to be used for fibre parallel gluing, e.g. glue lines between glulam components
of block-glued glulam and for large finger joints. Gap filling adhesives can in addition be classified as
application type GP usable for glue lines between laminations and for finger jointing of laminations and
structural timber.
Table 1 specifies the thirteen adhesive classes for which this European Standard applies and their
designations. The designations consist of:
— type: Ι or ΙΙ;
— application: GP, FJ or GF;
— maximum test temperature in degrees Celsius: 70 or 90 for type Ι, or maximum use temperature in
degrees Celsius: 50 for type ΙΙ;
— use: M for mixed application, and S for separate application of adhesive and hardener.
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Each application area and use shall be part of the designation.
EXAMPLE EN 301 I 70 GP 0,6M and E
...
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