EN 302-7:2023

Adhesives for load-bearing timber structures - Test methods - Part 7: Determination of the working life under referenced conditions

This document specifies a method for determining the working life for adhesives mixed with hardener for load-bearing timber structures, by a viscosity test.
This method does not apply to determining the working life of a multi-component adhesive whose actual working life is very short.
This document is only intended for obtaining a reliable basis for comparison between adhesives. The method gives results which cannot be applied to the safe manufacture of timber structures without modifications for the influences of factory temperature and relative air humidity.

Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 7: Bestimmung der Gebrauchsdauer bei Referenzbedingungen

Dieses Dokument legt ein Verfahren zur Bestimmung der Gebrauchsdauer für mit Härter gemischte Klebstoffe für tragende Holzbauteile mit einer Viskositätsprüfung fest.
Dieses Verfahren ist nicht anwendbar zur Bestimmung der Gebrauchsdauer eines Mehrkomponentenklebstoffs, dessen tatsächliche Gebrauchsdauer sehr kurz ist.
Dieses Dokument dient nur dazu, Klebstoffe auf einer zuverlässigen Grundlage zu vergleichen. Die nach diesem Verfahren erhaltenen Ergebnisse können nicht unverändert für die zuverlässige Herstellung von Holzbauteilen verwendet werden, ohne die Einflüsse von Verarbeitungstemperatur und relativer Luftfeuchte zu berücksichtigen.

Adhésifs pour structures portantes en bois - Méthodes d’essai - Partie 7 : Détermination de la durée d’utilisation dans des conditions de référence

Le présent document spécifie une méthode qui permet de déterminer, à partir d’un essai de viscosité, la durée d’utilisation des adhésifs mélangés à un durcisseur pour structures portantes en bois.
Cette méthode ne s’applique pas pour déterminer la durée d’utilisation d’un adhésif multicomposant dont la durée de vie réelle est très courte.
Le présent document vise seulement à fournir une base fiable pour la comparaison des adhésifs. Cette méthode fournit des résultats qui ne sont pas applicables sans risque à la fabrication de structures en bois, sans des modifications prenant en compte l’influence de la température et de l’humidité relative de l’air dans l’usine.

Lepila za nosilne lesene konstrukcije - Preskusne metode - 7. del: Določanje dobe trajanja pri referenčnih pogojih

Ta dokument opisuje metodo za določanje dobe trajanja lepil, pomešanih z utrjevalcem, za nosilne lesene strukture s preskusom viskoznosti.
Ta metoda ni ustrezna za določanje dobe trajanja večkomponentnega lepila z zelo kratko dobo trajanja.
Ta dokument je namenjen le za pridobivanje zanesljive podlage za primerjavo lepil. Z metodo se pridobijo rezultati, ki jih ni mogoče uporabiti za varno proizvodnjo lesenih struktur brez prilagoditev zaradi vplivov tovarniške temperature in relativne vlažnosti zraka.

General Information

• Status: Published
• Publication Date: 14-Feb-2023
• ICS: 83.180 - Adhesives
• Technical Committee: CEN/TC 193 - Adhesives
• Drafting Committee: CEN/TC 193/SC 1 - Adhesives for wood and derived timber products
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 15-Feb-2023
• Due Date: 09-Dec-2022
• Completion Date: 15-Feb-2023
• Ref Project: SIST EN 302-7:2023 - Adhesives for load-bearing timber structures - Test methods - Part 7: Determination of the working life under referenced conditions

Relations

• Replaces: EN 302-7:2013 - Adhesives for load-bearing timber structures - Test methods - Part 7: Determination of the working life under referenced conditions
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2023
Lepila za nosilne lesene konstrukcije - Preskusne metode - 7. del: Določanje dobe
trajanja pri referenčnih pogojih
Adhesives for load-bearing timber structures - Test methods - Part 7: Determination of
the working life under referenced conditions
Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 7: Bestimmung der
Gebrauchsdauer bei Referenzbedingungen
Adhésifs pour structures portantes en bois - Méthodes d’essai - Partie 7 : Détermination
de la durée d’utilisation dans des conditions de référence
Ta slovenski standard je istoveten z: EN 302-7:2023
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 302-7
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 83.180 Supersedes EN 302-7:2013
English Version
Adhesives for load-bearing timber structures - Test
methods - Part 7: Determination of the working life under
referenced conditions
Adhésifs pour structures portantes en bois - Méthodes Klebstoffe für tragende Holzbauteile - Prüfverfahren -
d'essai - Partie 7 : Détermination de la durée Teil 7: Bestimmung der Gebrauchsdauer bei
d'utilisation dans des conditions de référence Referenzbedingungen
This European Standard was approved by CEN on 18 December 2022.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 302-7:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols . 6
5 Principle . 6
6 Apparatus . 7
7 Procedure. 7
8 Expression of results . 8
9 Test report . 9
9.1 The adhesives . 9
9.2 Testing procedure . 9
9.3 Test results . 9

European foreword
This document (EN 302-7:2023) 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 August 2023, and conflicting national standards shall
be withdrawn at the latest by August 2023.
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 302-7:2013.
The main changes compared to the previous edition are listed below:
a) the list of standards in the Introduction has been updated;
b) one new clause (Symbols) has been introduced;
c) in 6.2, “Brookfield type viscometer” has been changed to “single cylinder type rotational
viscometer”;
d) Clause 9 Test report has been changed.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Introduction
This document is one of a series dealing with adhesives for use with timber structures, and is published
in support of the EN 1995 series Eurocode 5: Design of timber structures. The series consists of five
classification and performance requirements for adhesives for load-bearing timber structures, phenolic
and aminoplastic adhesives (EN 301), one component polyurethane adhesives (EN 15425), emulsion
polymer isocyanate adhesives (EN 16254), two component epoxy and polyurethane adhesives for glued
in rods (EN 17334) and for on-site repair of cracked timber structures (EN 17418) 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,
EN 302-8, 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 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 perpendicular to the glue line (Glass house 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
EN 15425, Adhesives — One component polyurethane (PUR) for load-bearing timber structures —
Classification and performance requirements
EN 16254, Adhesives — Emulsion polymer isocyanate (EPI) for load-bearing timber structures —
Classification and performance requirements
EN 17334, Glued-in rods in glued structural timber products — Testing, requirements and bond shear
strength classification
EN 17418, Two-component epoxy and p
...