SIST EN 302-3:2017
(Main)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
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
This European Standard specifies a method for determining the effect on bond strength of damage to wood fibres caused by the action of acids from the adhesive or primer used in the gluing process during climatic cycling. It is suitable for the following applications: a) for assessing the compliance of adhesives with EN 301, EN 15425 and FprEN 16254; b) for assessing the suitability and quality of adhesives for load-bearing timber structures; c) for determining if the adhesive after bonding has a damaging influence on the strength of the wood due to chemical action. This test is intended primarily to obtain performance data for the classification of adhesives for load-bearing timber structures according to their suitability for use in defined climatic environments. This test is carried out on Norway spruce (Picea abies L.). This method is not intended for use to provide numerical design data and does not necessarily represent the performance of the bonded member in service.
Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 3: Bestimmung des Einflusses von Säureschädigung der Holzfasern durch Temperatur- und Feuchtezyklen auf die Querzugfestigkeit
Diese Europäische Norm legt ein Verfahren zur Bestimmung des Einflusses von Holzfaserschädigung auf die Klebstofffugenfestigkeit, verursacht durch die Wirkung von Säuren des Klebstoffs oder eines im Klebeprozess eingesetzten Haftvermittlers (Primer) während einer zyklischen Klimabeanspruchung, fest.
Sie ist für folgende Anwendungsfälle geeignet:
a) zur Beurteilung der Übereinstimmung von Klebstoffen mit EN 301, EN 15425 und EN 16254;
b) zur Beurteilung der Eignung und Qualität von Klebstoffen für tragende Holzbauteile;
c) zur Feststellung, ob der Klebstoff nach der Verklebung infolge chemischer Vorgänge einen schädigenden Einfluss auf die Holzfestigkeit hat.
Diese Prüfung dient hauptsächlich der Bestimmung von Leistungswerten zur Klassifizierung von Klebstoffen für tragende Holzbauteile entsprechend ihrer Eignung zum Einsatz unter bestimmten klimatischen Bedin¬gungen. Diese Prüfung wird mit Fichte (Picea abies L.) durchgeführt.
Dieses Verfahren ist nicht dafür vorgesehen, Bemessungswerte bereitzustellen und gibt nicht zwangsläufig die Leistungsfähigkeit des verklebten Bauteiles im Gebrauch wieder.
Adhésifs pour structures portantes en bois - Méthodes d'essai - Partie 3: Détermination de l'influence de l'attaque d'acide des fibres de bois, résultant de traitements cycliques en température et humidité sur la résistance à la traction transversale
La présente Norme européenne décrit une méthode de détermination de l’influence sur la résistance à la rupture d’un joint de l’attaque des fibres de bois provoquée par l’action d’acides contenus dans l’adhésif ou un primaire utilisé lors du processus de collage pendant des cycles climatiques.
Elle concerne les applications suivantes :
a) évaluation de la conformité des adhésifs à l’EN 301, à l’EN 15425 et à l’EN 16254 ;
b) évaluation de l’aptitude à l’emploi et de la qualité des adhésifs pour les structures portantes en bois ;
c) détermination de l’éventuelle influence nuisible de l’adhésif après collage sur la résistance du bois résultant d’une action chimique.
Le présent essai est principalement destiné à obtenir des données de performances en vue de la classification des adhésifs pour les structures portantes en bois en fonction de leur aptitude à l’utilisation dans des environnements climatiques définis. Cet essai est réalisé sur de l’épicéa (Picea abies L.) ou sur du hêtre (Fagus sylvatica L.).
La présente méthode n’est pas destinée à fournir des données numériques relatives à la conception et ne représente pas nécessairement les performances de l’élément collé dans son application.
Lepila za nosilne lesene konstrukcije - Preskusne metode - 3. del: Ugotavljanje vpliva kislinskih poškodb lesnih vlaken, nastalih zaradi cikličnih obremenitev s temperaturo in vlago, na prečno natezno trdnost
Ta evropski standard določa metodo za ugotavljanje vpliva poškodb lesnih vlaken na sprijemno trdnost, ki nastanejo zaradi delovanja kislin iz lepila ali premaza, uporabljenega pri postopku lepljenja, med podnebno obremenitvijo. Metoda se uporablja za: a) oceno skladnosti lepil s standardi EN 301, EN 15425 in FprEN 16254; b) oceno ustreznosti in kakovosti lepil za nosilne lesene konstrukcije; c) ugotavljanje, ali ima lepilo po sprijemanju škodljiv vpliv na trdnost lesa zaradi delovanja kemikalij. Ta preskus je namenjen zlasti pridobivanju podatkov o lastnostih za razvrstitev lepil za nosilne lesene konstrukcije glede na njihovo ustreznost za uporabo v opredeljenih podnebnih okoljih. Pri tem poskusu se uporablja norveška smreka (Picea abies L.). Ta metoda ni namenjena za zagotavljanje številskih podatkov o zasnovi, pri čemer ne predstavlja nujno lastnosti zlepljenega elementa v uporabi.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 3: Bestimmung des Einflusses von Säureschädigung der Holzfasern durch Temperatur- und Feuchtezyklen auf die QuerzugfestigkeitAdhésifs pour structures portantes en bois - Méthodes d'essai - Partie 3: Détermination de l'influence de l'attaque d'acide des fibres de bois, résultant de traitements cycliques en température et humidité sur la résistance à la traction transversaleAdhesives 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 strength91.080.20Lesene konstrukcijeTimber structures83.180LepilaAdhesivesICS:Ta slovenski standard je istoveten z:EN 302-3:2017SIST EN 302-3:2017en,fr,de01-november-2017SIST EN 302-3:2017SLOVENSKI
STANDARDSIST EN 302-3:20131DGRPHãþD
SIST EN 302-3:2017
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 302-3
September
t r s y ICS
z uä s z r Supersedes EN
u r tæ uã t r s uEnglish Version
Adhesives for loadæbearing timber structures æ Test methods æ Part
uã Determination of the effect of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength Adhésifs pour structures portantes en bois æ Méthodes d 5essai æ Partie
uã Détermination de l 5influence de l 5attaque d 5acide des fibres de boisá résultant de traitements cycliques en température et humidité sur la résistance à la traction transversale
Klebstoffe für tragende Holzbauteile æ Prüfverfahren æ Teil
uã Bestimmung des Einflusses von Säureschädigung der Holzfasern durch Temperaturæ und Feuchtezyklen auf die Querzugfestigkeit This European Standard was approved by CEN on
{ July
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
u r tæ uã t r s y ESIST EN 302-3:2017
EN 302-3:2017 (E) 2 Contents Page European foreword . 3 Introduction . 4 1 Scope . 6 2 Normative references . 6 3 Principle . 6 4 Apparatus . 6 5 Method . 7 5.1 Selection of timber . 7 5.2 Preparation of the bonded assemblies . 7 5.3 Preparation of the test pieces . 9 5.4 Number of test pieces . 9 5.5 Climatic and cyclic storage conditions . 9 5.6 Test procedure . 10 6 Expression of results . 10 7 Test report . 11 Bibliography . 12
SIST EN 302-3:2017
EN 302-3:2017 (E) 3 European foreword This document (EN 302-3:2017) 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 March 2018, and conflicting national standards shall be withdrawn at the latest by March 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 302-3:2013. Compared to EN 302-3:2013 the following modification has 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) specification of beech for test pieces for gap filling adhesives in 5.1; c) reparation of test pieces for gap filling adhesives added in 5.2; d) description of climate cycling test in 5.5 completed. 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. SIST EN 302-3:2017
EN 302-3:2017 (E) 4 Introduction This document is one of a series dealing with adhesives for use with timber structures, and is published in support of EN 1995, Eurocode 5: Design of timber structures. The series consists of three classification and performance requirements for adhesives for load-bearing timber structures, phenolic and aminoplastic adhesives (EN 301), one component polyurethane adhesives (EN 15425) and emulsion polymerized isocyanate adhesives (EN 16254), and all together twelve test methods (EN 302-1, EN 302-2, EN 302-3, EN 302-4, EN 302-5, EN 302-6, EN 302-7 and EN 302-8, and EN 15416-1, EN 15416-3, EN 15416-4 and EN 15416-5). These European Standards have the following titles. EN 301, Adhesives, phenolic and aminoplastic, for load-bearing timber structures — Classification and performance requirements EN 15425, Adhesives — Classification and performance requirements EN 16254, Adhesives — Emulsion polymerized isocyanate (EPI) for load-Classification and performance requirements EN 302, Adhesives for load-bearing timber structures — Test methods — Part 1: Determination of longitudinal tensile shear strength — Part 2: Determination of resistance to delamination — Part 3: Determination of the effect of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength — Part 4: Determination of the effects of wood shrinkage on the shear strength — Part 5: Determination of maximum assembly time under referenced conditions — Part 6: Determination of the minimum pressing time under referenced conditions — Part 7: Determination of the working life under referenced conditions — Part 8: Static load test of multiple bond line specimens in compression shear EN 15416, Adhesives for load bearing timber structures other than phenolic and aminoplastic — Test methods — Part 1: Long-term tension load test perpendicular to the bond line at varying climate conditions with specimens loaded perpendicular to the glue line (Glasshouse test) — Part 3: Creep deformation test at cyclic climate conditions with specimens loaded in bending shear — Part 4: Determination of open assembly time under referenced conditions — Part 5: Determination of minimum pressing time under referenced conditions SIST EN 302-3:2017
EN 302-3:2017 (E) 5 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 can have a negative environmental impact. As technological advantages lead to better alternatives for these materials, they will be eliminated from this standard to the greatest extent possible. At the end of the test, it is recommended that the user of the standard take care to carry out an appropriate disposal of the wastes, according to local regulations. SIST EN 302-3:2017
EN 302-3:2017 (E) 6 1 Scope This European Standard specifies a method for determining the effect on bond strength of damage to wood fibres caused by the action of acids from the adhesive or primer used in the gluing process during climatic cycling. It is suitable for the following applications: a) for assessing the compliance of adhesives with EN 301, EN 15425 and EN 16254; b) for assessing the suitability and quality of adhesives for load-bearing timber structures; c) for determining if the adhesive after bonding has a damaging influence on the strength of the wood due to chemical action. This test is intended primarily to obtain performance data for the classification of adhesives for load-bearing timber structures according to their suitability for use in defined climatic environments. This test is carried out on Norway spruce (Picea abies L.) or Beech (Fagus sylvatica L.). This method is not intended for use to provide numerical design data and does not necessarily represent the performance of the bonded member in service. 2 N
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SLOVENSKI STANDARD
oSIST prEN 302-3:2015
01-november-2015
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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
Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 3: Bestimmung des Einflusses
von Säureschädigung der Holzfasern durch Temperatur- und Feuchtezyklen auf die
Querzugfestigkeit
Adhésifs pour structures portantes en bois - Méthodes d'essai - Partie 3: Détermination
de l'influence de l'attaque d'acide des fibres de bois, résultant de traitements cycliques
en température et humidité sur la résistance à la traction transversale
Ta slovenski standard je istoveten z: prEN 302-3 rev
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
oSIST prEN 302-3:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 302-3:2015
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oSIST prEN 302-3:2015
DRAFT
EUROPEAN STANDARD
prEN 302-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2015
ICS 83.180 Will supersede EN 302-3:2013
English Version
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
Adhésifs pour structures portantes en bois - Méthodes Klebstoffe für tragende Holzbauteile - Prüfverfahren -
d'essai - Partie 3: Détermination de l'influence de Teil 3: Bestimmung des Einflusses von
l'attaque d'acide des fibres de bois, résultant de Säureschädigung der Holzfasern durch Temperatur-
traitements cycliques en température et humidité sur und Feuchtezyklen auf die Querzugfestigkeit
la résistance à la traction transversale
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 302-3:2015 E
worldwide for CEN national Members.
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oSIST prEN 302-3:2015
prEN 302-3:2015 (E)
Contents Page
Foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Principle . 6
4 Apparatus . 6
5 Method . 7
5.1 Selection of timber . 7
5.2 Preparation of the bonded assemblies . 7
5.3 Preparation of the test pieces . 9
5.4 Number of test pieces . 9
5.5 Climatic and cyclic storage conditions . 9
5.6 Test procedure . 10
6 Expression of results . 10
7 Test report . 10
7.1 The adhesive . 10
7.2 Preparation of test pieces and testing procedures . 11
7.3 Test results . 11
Bibliography . 12
2
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oSIST prEN 302-3:2015
prEN 302-3:2015 (E)
Foreword
This document (prEN 302-3:2015) 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 302-3:2013.
Compared to EN 302-3:2013 the following modification has been made:
a) specification of beech for test pieces for gap filling adhesives in 5.1;
b) preparation of test pieces for gap filling adhesives added in 5.2;
c) description of climate cycling test in 5.5 completed.
3
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oSIST prEN 302-3:2015
prEN 302-3:2015 (E)
Introduction
This document is one of a series dealing with adhesives for use with timber structures, and is published
in support of EN 1995, Eurocode 5: Design of timber structures. The series consists of three classification
and performance requirements for adhesives for load-bearing timber structures, phenolic and
aminoplastic adhesives (EN 301), one component polyurethane adhesives (EN 15425) and emulsion
polymerized isocyanate adhesives (EN 16254), and all together 11 test methods (EN 302-1, EN 302-2,
EN 302-3, EN 302-4, EN 302-5, EN 302-6 and EN 302-7 and EN 15416-2, EN 15416-3, EN 15416-4 and
EN 15416-5).
These European Standards have the following titles.
EN 301, Adhesives, phenolic and aminoplastic, for load-bearing timber structures — Classification and
performance requirements
EN 15425, Adhesives — One component polyurethane for load bearing ― Classification and performance
requirements
EN 16254, Adhesives — Emulsion polymerized isocyanate (EPI) for load-bearing timber structures ―
Classification and performance requirements
EN 302, Adhesives for load-bearing timber structures — Test methods
— Part 1: Determination of longitudinal tensile shear strength
— Part 2: Determination of resistance to delamination
— Part 3: Determination of the effect of acid damage to wood fibres by temperature and humidity cycling
on the transverse tensile strength
— Part 4: Determination of the effects of wood shrinkage on the shear strength
— Part 5: Determination of maximum assembly time under referenced conditions
— Part 6: Determination of the minimum pressing time under referenced conditions
— Part 7: Determination of the working life under referenced conditions
EN 15416, 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
— Part 3: Creep deformation test at cyclic climate conditions with specimens loaded in bending shear
— Part 4: Determination of open assembly time for one component polyurethane adhesives
— Part 5: Determination of conventional pressing time
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.
4
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oSIST prEN 302-3:2015
prEN 302-3:2015 (E)
Environmental statement
It is understood that some of the material permitted in this standard can have a negative environmental
impact. As technological advantages lead to better alternatives for these materials, they will be
eliminated from this standard to the greatest extent possible.
At the end of the test, it is recommended that the user of the standard take care to carry out an
appropriate disposal of the wastes, according to local regulations.
5
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oSIST prEN 302-3:2015
prEN 302-3:2015 (E)
1 Scope
This European Standard specifies a method for determining the effect on bond strength of damage to
wood fibres caused by the action of acids from the adhesive or primer used in the gluing process during
climatic cycling.
It is suitable for the following applications:
a) for assessing the compliance of adhesives with EN 301, EN 15425 and EN 16254;
b) for assessing the suitability and quality of adhesives for load-bearing timber structures;
c) for determining if the adhesive after bonding has a damaging influence on the strength of the wood
due to chemical action.
This test is intended primarily to obtain performance data for the classification of adhesives for load-
bearing timber structures according to t
...
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