FprEN 302-7
(Main)Adhesives for load-bearing timber structures - Test methods - Part 7: Determination of the working life under referenced conditions
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 geeignet 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
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 302-7:2021
01-november-2021
Nadomešča:
SIST EN 302-7:2013
Lepila za nosilne lesene konstrukcije - Preskusne metode - 7. del: Določanje dobe
trajanja pri referenčnih pogojihAdhesives for load-bearing timber structures - Test methods - Part 7: Determination of
the working life under referenced conditionsKlebstoffe 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 référenceTa slovenski standard je istoveten z: prEN 302-7
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
oSIST prEN 302-7:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 302-7:2021
DRAFT
EUROPEAN STANDARD
prEN 302-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 83.180 Will supersede 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 ReferenzbedingungenThis 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, 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, 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: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 302-7:2021 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
oSIST prEN 302-7:2021
prEN 302-7:2021 (E)
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 .......................................................................................................................................................... 6
7 Procedure .......................................................................................................................................................... 7
8 Expression of results ..................................................................................................................................... 8
9 Test report ......................................................................................................................................................... 8
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prEN 302-7:2021 (E)
European foreword
This document (prEN 302-7:2021) has been prepared by Technical Committee CEN/TC 193 “Adhesives”,
the secretariat of which is held by UNE.This document is currently submitted to the CEN Enquiry.
This document will supersede EN 302-7:2013.
In comparison with the previous edition, the following technical modifications have been made:
— list of standards in Introduction updated;— one new clause (Symbols) is introduced;
— in 6.2 – Brookfield type viscometer changed by – single cylinder type rotational viscometer.
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prEN 302-7:2021 (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 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
polymerised 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 ( all parts), 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 requirementsEN 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 (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 requirementsEN 16254, Adhesives — Emulsion polymerized isocyanate (EPI) for load-bearing timber structures ―
Classification and performance requirementsEN 17334, Glued-in rods in glued structural timber products — Testing, requirements, and bond shear
strength classificationEN 17418, Two-component epoxy and polyurethane adhesives for on-site repair of cracked timber
structures ― Testing, requirements, and repair strength verification---------------------- Page: 6 ----------------------
oSIST prEN 302-7:2021
prEN 302-7:2021 (E)
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, associa...
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