SIST EN 302-2:2013
(Main)Adhesives for load-bearing timber structures - Test methods - Part 2: Determination of resistance to delamination
Adhesives for load-bearing timber structures - Test methods - Part 2: Determination of resistance to delamination
This European Standard specifies a method for determining the resistance to delamination in glue lines. It is suitable for the following applications:
a) for assessing the compliance of adhesives with EN 301, EN 15425 and prEN 16254;
b) for assessing the suitability and quality of adhesives for load-bearing timber structures;
c) for comparing the effects on the bond strength resulting from the choice of bonding conditions, from different climatic conditioning and from the treatment of the test pieces before and after bonding. This test is not applicable for modified and stabilised wood with strongly reduced swelling and shrinkage properties, such as acetylated wood, heat-treated wood and polymer impregnated wood. 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 method is not intended to provide data for structural design, and does not necessarily represent the performance of the bonded member in service.
Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 2: Bestimmung der Delaminierungsbeständigkeit
Dieser Teil von EN 302 legt ein Verfahren zur Bestimmung der Beständigkeit von Klebstoffverbindungen gegen Delaminierung fest.
Er ist für folgende Anwendungsfälle geeignet:
a) zur Beurteilung der Übereinstimmung von Klebstoffen mit EN 301 und EN 15425;
b) zur Beurteilung der Eignung und Qualität von Klebstoffen für tragende Holzbauteile;
c) zum Vergleich der Auswirkungen der gewählten Verklebungsbedingungen, von verschiedenen klimatischen Beanspruchungen und von der Behandlung der Prüfkörper vor und nach der Verklebung auf die Klebefestigkeit.
Diese Prüfung gilt nicht für modifiziertes und stabilisiertes Holz mit stark verringerten Quellungs- und Schwindungseigenschaften, wie beispielsweise acetyliertes Holz, wärmebehandeltes Holz und polymerimprägniertes Holz.
Diese Prüfung dient hauptsächlich der Ermittlung von Leistungswerten für die Klassifizierung von Klebstoffen für tragende Holzbauteile entsprechend ihrer Eignung zum Einsatz unter festgelegten klimatischen Bedingungen.
Dieses Verfahren ist nicht dafür vorgesehen, Daten für die Konstruktion bereitzustellen und gibt nicht zwangsläufig das Verhalten des verklebten Bauteiles im Gebrauch wieder.
Adhésifs pour structures portantes en bois - Méthodes d'essai - Partie 2: Détermination de la résistance à la délamination
Cette partie de l’EN 302 décrit une méthode de détermination de la résistance à la délamination des joints de colle.
Elle concerne les applications suivantes :
a) évaluation de la conformité des adhésifs à l’EN 301 et à l’EN 15425 ;
b) évaluation de l’adéquation et de la qualité des adhésifs pour les structures portantes en bois ;
c) comparaison des effets sur la résistance à la rupture du joint en fonction du choix des conditions de collage, des divers conditionnements climatiques et du traitement des éprouvettes avant et après le collage.
Cet essai ne s’applique pas aux bois modifiés et stabilisés ayant des propriétés de retrait et de gonflement fortement réduites, tel que les bois acétylés, les bois traités thermiquement et les bois imprégnés de polymère.
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.
La présente méthode n’est pas destinée à fournir des données relatives au dimensionnement des structures et ne représente pas nécessairement les performances de l’élément collé dans son application.
Lepila za nosilne lesene konstrukcije - Preskusne metode - 2. del: Ugotavljanje odpornosti lepljenega stika proti razslojevanju (delaminaciji)
Ta evropski standard določa metodo za ugotavljanje odpornosti lepljenega stika proti razslojevanju (delaminaciji). Metoda se uporablja:
a) za oceno skladnosti lepil s standardi EN 301, EN 15425 in prEN 16254;
b) za oceno ustreznosti in kakovosti lepil za nosilne lesene konstrukcije;
c) za primerjavo vpliva na sprijemno trdnost, ki izhaja iz izbire pogojev lepljenja, različnih podnebnih danosti in obdelave preskusnih kosov pred lepljenjem in po njem. Ta preskus se ne uporablja za obdelan in stabiliziran les, ki se bistveno manj nabreka in krči, kot so acetiliran les, toplotno obdelan les in polimerno impregniran les. 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. Ta metoda ni namenjena za zagotavljanje podatkov za konstrukcijsko zasnovo, pri čemer ne predstavlja nujno lastnosti zlepljenega elementa v uporabi.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lepila za nosilne lesene konstrukcije - Preskusne metode - 2. del: Ugotavljanje odpornosti lepljenega stika proti razslojevanju (delaminaciji)Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 2: Bestimmung der DelaminierungsbeständigkeitAdhésifs pour structures portantes en bois - Méthodes d'essai - Partie 2: Détermination de la résistance à la délaminationAdhesives for load-bearing timber structures - Test methods - Part 2: Determination of resistance to delamination91.080.20Lesene konstrukcijeTimber structures83.180LepilaAdhesivesICS:Ta slovenski standard je istoveten z:EN 302-2:2013SIST EN 302-2:2013en,de01-maj-2013SIST EN 302-2:2013SLOVENSKI
STANDARDSIST EN 302-2:20041DGRPHãþD
SIST EN 302-2:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 302-2
March 2013 ICS 83.180 Supersedes EN 302-2:2004English Version
Adhesives for load-bearing timber structures - Test methods - Part 2: Determination of resistance to delamination
Adhésifs pour structures portantes en bois - Méthodes d'essai - Partie 2: Détermination de la résistance à la délamination
Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 2: Bestimmung der Delaminierungsbeständigkeit This European Standard was approved by CEN on 5 February 2013.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 302-2:2013: ESIST EN 302-2:2013
EN 302-2:2013 (E) 2 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 members .7 5.3 Preparation of test pieces .8 5.4 Test procedures .8 5.4.1 General .8 5.4.2 High temperature procedure (for type I adhesives) .9 5.4.3 Low temperature procedure (for type II adhesives) .9 5.5 Measurement and evaluation of delamination . 10 6 Expression of results . 11 7 Test report . 11 7.1 The adhesives . 11 7.2 Preparation of test pieces and testing procedure . 11 7.3 Test results . 12 Bibliography . 13
SIST EN 302-2:2013
EN 302-2:2013 (E) 3 Foreword This document (EN 302-2:2013) has been prepared by Technical Committee CEN/TC 193 “Adhesives”, the secretariat of which is held by AENOR. 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 September 2013 and conflicting national standards shall be withdrawn at the latest by September 2013. 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 302-2:2004. The following modifications have been made: The glue spread for minimum and maximum assembly time is now given for aminoplastic and phenolic adhesives; The standard is now used for assessing the compliance for adhesives with EN 301, EN 15425 and prEN 16254. According to the CEN-CENELEC Internal Regulations, the national standards organizations 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. .SIST EN 302-2:2013
EN 302-2:2013 (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 polymerised isocyanate adhesives (prEN 16254), and all together eleven test methods (EN 302 Parts 1 to 7 and EN 15416 Parts 2 to 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 timber struperformance requirements prEN 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 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. SIST EN 302-2:2013
EN 302-2:2013 (E) 5 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 302-2:2013
EN 302-2:2013 (E) 6 1 Scope This European Standard specifies a method for determining the resistance to delamination in glue lines. It is suitable for the following applications: a) for assessing the compliance of adhesives with EN 301, EN 15425 and prEN 16254; b) for assessing the suitability and quality of adhesives for load-bearing timber structures; c) for comparing the effects on the bond strength resulting from the choice of bonding conditions, from different climatic conditioning and from the treatment of the test pieces before and after bonding. This test is not applicable for modified and stabilised wood with strongly reduced swelling and shrinkage properties, such as acetylated wood, heat-treated wood and polymer impregnated wood. 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 method is not intended to provide data for structural design, and does not necessarily represent the performance of the bonded member in service. 2 Normative references Not applicable. 3 Principle Bonded, laminated specimens are subjected to an impregnation-drying procedure. The specimens are impregnated with water by immersing them and applying alternating high and low (vacuum) pressure. They are then dried rapidly in a specified air stream at low humidity (see 4.4). The extent of open glue lines, delamination, as a result of these treatments is measured and compared with the total length of glue lines on both end-grain faces of the specimen. 4 Apparatus 4.1 Autoclave or similar pressure vessel, designed to safely withstand a pressure of at least 625 kPa absolute (525 kPa above nominal atmospheric pressure). 4.2 Vacuum pump or similar device, capable of reducing the pressure in the vessel (4.1) to below 20 kPa absolute (80 kPa below nominal atmospheric pressure). 4.3 Pump or similar device, for obtaining a pressure of at least 600 kPa absolute (500 kPa above nominal atmospheric pressure). 4.4 Air-circulating oven(s) or chamber(s), capable of drying the test pieces (see 5.4) in the following climate condition: a) for low temperature procedure (type II adhesive) a temperature of (27,5 ± 2,5) °C, circulating the air within the chamber, maintaining a constant relative humidity of (30 ± 5) %; and b) for high temperature procedure (type I adhesive) a temperature of (65 ± 3) °C, circulating the air within the chamber, maintaining a relative humidity of (12,5 ± 2,5) %. SIST EN 302-2:2013
EN 302-2:2013 (E) 7 NOTE Air speed velocity of 2 m/s to 3 m/s in empty chamber has shown to be suitable to achieve drying times according to 5.4.2 and 5.4.3. 4.5 Balance, allowing measurements with an accuracy of ± 1 g. 4.6 Wood chisel and hammer, or similar devices capable of opening the glue lines. 5 Method 5.1 Selection of timber Use flat-sawn, straight-grained Norway spruce (Picea abies L.), free of reaction wood, with a density of (450 ± 25) kg/m³ at (12 ± 1) % moisture content. Preferably, knot-free wood should be used, but allowances are made for boards with knots up to a maximum of 20 mm in diameter, but splay (spike) knot is not allowed. The test with Norway spruce also covers approval of silver fir (Abies alba) and Scot
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