BS EN 15416-5-2017 Adhesives for load bearing timber structures other than phenolic and aminoplastic Test methods Determination of minimum pressing time under referenced conditions.pdf

1、BS EN 15416-5:2017Adhesives for load bearingtimber structures other thanphenolic and aminoplastic Test methodsPart 5: Determination of minimum pressingtime under referenced conditionsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 15416-5:2017 BRITISH STANDARDN

2、ational forewordThis British Standard is the UK implementation of EN 15416-5:2017.It supersedes BS EN 15416-5:2006 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/52, Adhesives.A list of organizations represented on this committee can beobtained on

3、request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2017. Published by BSI Standards Limited 2017ISBN 978 0 580 85711 9ICS 83.180Compliance with a British

4、Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 January 2017.Amendments/Corrigenda issued since publicationDate Text affectedBS EN 15416-5:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCH

5、E NORM EN 15416-5 January 2017 ICS 83.180 Supersedes EN 15416-5:2006English Version Adhesives for load bearing timber structures other than phenolic and aminoplastic - Test methods - Part 5: Determination of minimum pressing time under referenced conditions Adhsifs pour structures portantes en bois

6、de type autre que phnolique et aminoplaste - Mthodes dessais - Partie 5 : Dtermination du temps de pressage minimal dans des conditions de rfrence Klebstoffe fr tragende Holzbauteile ausgenommen Phenolharzklebstoffe und Aminoplaste - Prfverfahren - Teil 5: Bestimmung der Mindestpresszeit bei Referen

7、zbedingungen This European Standard was approved by CEN on 30 October 2016. 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 biblio

8、graphical 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 responsi

9、bility 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 Republ

10、ic 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 COMIT EUROPEN DE

11、 NORMALISATION EUROPISCHES KOMITEE FR 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 worldwide for CEN national Members. Ref. No. EN 15416-5:2017 EBS EN 15416-5:2017EN 15416-5:2017 (E) 2 Contents Page

12、 European foreword . 3 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms and definitions . 6 4 Principle . 7 5 Apparatus . 7 5.1 Climate cabinets 7 5.2 Testing machine 7 6 Procedure. 7 6.1 General 7 6.2 Preparation of bonded assemblies . 7 6.3 Preparation of test specimens 8 6.4 Test procedu

13、re . 8 7 Expression of results 9 7.1 Tensile shear strength . 9 7.2 Failure mode . 9 8 Requirement . 9 9 Test report . 9 9.1 General information . 9 9.2 Information about the adhesive 9 9.3 Preparation of test pieces and testing procedure 10 9.4 Test results . 10 BS EN 15416-5:2017EN 15416-5:2017 (E

14、) 3 European foreword This document (EN 15416-5:2017) 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

15、the latest by July 2017, and conflicting national standards shall be withdrawn at the latest by July 2017. 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 ri

16、ghts. This document supersedes EN 15416-5:2006. Compared to EN 15416-5:2006, the following main modifications have been made: a) title has been changed;b) application for EPI adhesives according to EN 16254 has been added;c) the pressing times are determined for both close contact glue line and 0,3

17、mm thick glue line whentesting PUR adhesives (EN 15425) and EPI adhesives in category “General purpose” (EN 16254),and close contact glue line and 0,2 mm thick glue for EPI adhesives designed for category “Smalldimensions” (EN 16254);d) some parts of this European Standard are made in line with EN 3

18、02-6:2013;e) some of the wording in EN 302-1:2013 have been used to describe how to evaluate and report %wood failure (fibre failure) in the tested test pieces;f) it is stated that the glue application shall be done at the temperature used for conditioning andpressing of the material. When screening

19、 tests are performed, the material may, however, beremoved from the test temperature for glue application;g) measurement and reporting of glue line thickness has been deleted.This document is one of a series dealing with adhesives for use with timber structures, and is published in support of produc

20、t standards for bonded load-bearing 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 iso

21、cyanate adhesives (EN 16254), together with 12 test methods (EN 302 Parts 1 to 8 and EN 15416 Parts 1 and 3 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,

22、 Adhesives One component polyurethane (PUR) for load-bearing timber structures - Classification and performance requirements BS EN 15416-5:2017EN 15416-5:2017 (E) 4 EN 16254, Adhesives Emulsion polymerized isocyanate (EPI) for load-bearing timber structures Classification and performance requirement

23、s 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 struc

24、tures 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

25、 EN 302-5, Adhesives for load-bearing timber structures Test methods Part 5: Determination of maximum assembly time under referenced conditions EN 302-6, Adhesives for load-bearing timber structures Test methods Part 6: Determination of the minimum pressing time under referenced conditions EN 302-7,

26、 Adhesives for load-bearing timber structures Test methods Part 7: Determination of the working life under referenced conditions 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 15416-1, Adhesives for

27、 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) EN 15416-3, Adhesives for load bearing timber structures

28、 other than phenolic and aminoplastic Test methods Part 3: Creep deformation test at cyclic climate conditions with specimens loaded in bending shear EN 15416-4, Adhesives for load bearing timber structures other than phenolic and aminoplastic Test methods Part 4: Determination of open assembly time

29、 under referenced conditions EN 15416-5, Adhesives for load bearing timber structures other than phenolic and aminoplastic Test methods Part 5: Determination of minimum pressing time under referenced conditions According to the CEN-CENELEC Internal Regulations, the national standards organisations o

30、f 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, Net

31、herlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 15416-5:2017EN 15416-5:2017 (E) 5 Introduction Safety statement Persons using this European Standard should be familiar with the normal laboratory practice, if ap

32、plicable. This European Standard 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 tha

33、t some of the material permitted in this European Standard may have negative environmental impact. As technological advantages lead to better alternatives for these materials, they will be eliminated from this European Standard to the extent possible. At the end of the test, it is recommended that t

34、he user of this European Standard take care to carry out an appropriate disposal of the wastes, according to local regulation. BS EN 15416-5:2017EN 15416-5:2017 (E) 6 1 Scope This European Standard specifies a laboratory method of determining the minimum pressing time for two glue line thicknesses,

35、close contact and 0,2 mm or 0,3 mm, at three temperatures and three wood moisture contents. This European Standard is intended to determine the minimum pressing time using a defined procedure for obtaining a reliable base for comparison of minimum pressing time between adhesives under referenced con

36、ditions. The method gives a result that cannot be applied to the safe manufacture of timber structures without taking into account the influence in variation of factors such as timber density, moisture content, factory temperature and relative air humidity. 2 Normative references The following docum

37、ents, 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 302-1:2013, Adhesives f

38、or load-bearing timber structures Test methods Part 1: Determination of longitudinal tensile shear strength EN 923:2015, Adhesives Terms and definitions EN 15425, Adhesives One component polyurethane (PUR) for load-bearing timber structures Classification and performance requirements EN 16254, Adhes

39、ives Emulsion polymerized isocyanate (EPI) for load-bearing timber structures Classification and performance requirements ISO 5893, Rubber and plastics test equipment Tensile, flexural and compression types (constant rate of traverse) Specification ISO 6344-2, Coated abrasives Grain size analysis Pa

40、rt 2: Determination of grain size distribution of macrogrits P12 to P220 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 923:2015 and the following apply. 3.1 pressing time time for which an adhesive joint is pressed 3.2 minimum pressing time shortest

41、 pressing time until the minimum bonding strength has been reached Note 1 to entry: The minimum bonding strength is specified in Clause 8 “Requirement”. BS EN 15416-5:2017EN 15416-5:2017 (E) 7 4 Principle Standard beech lap joints are tested in tensile shear after various curing times until it is fo

42、und that a tensile shear strength of at least 4 N/mm2is achieved at a given temperature and wood moisture content. 5 Apparatus 5.1 Climate cabinets Climatic cabinet capable of maintaining a temperature of (20 2) C and a relative humidity of (50 5) %, (65 5) % or (75 5) % to enable conditioning of th

43、e beech panels to a wood moisture content of (9 1) %, (12 1) %, or (15 1) %, respectively. Temperature cabinets capable of maintaining air temperature of (15 2) C, (20 2) C and (30 2) C respectively. 5.2 Testing machine The testing machine shall be: a) either capable of maintaining a constant rate o

44、f loading of (2,0 0,5) kN/min; b) or capable of maintaining constant crosshead speed as described in ISO 5893. The jaws of the testing machine shall grip the test pieces firmly and prevent slippage during loading. The grip shall be fixed in hinged manner. 6 Procedure 6.1 General Sufficient beech pan

45、els shall be prepared to enable manufacturing of 15 sets each of at least 10 test specimens as defined in EN 302-1:2013, Clause 7 with the following glue line thickness: adhesives tested according to EN 15425: close contact and (0,3 0,1) mm; adhesives tested according to EN 16254: close contact and

46、(0,3 0,1) mm for application area “General purpose”, or close contact and (0,2 0,1) mm for application area “Small dimension”. For very fast setting adhesives and close contact glue line, individual single lap joint test pieces (see EN 302-1:2013, Figure 3) may be prepared for the bonding and the pe

47、rformance of the test. 6.2 Preparation of bonded assemblies After conditioning nine sets to (12 1) %, three sets to (9 1) % and three sets to (15 1) % wood moisture content in the climate cabinet, the panels shall be lightly planed or lightly sanded (using an abrasive paper of grain size P100 as def

48、ined in ISO 6344-2) before being divided into groups. The panels with (12 1) % shall be divided into 3 equal groups, one for each of the 3 test temperatures given in Table 1. All the groups shall be stored in an adequate manner to prevent a change in moisture content. Each group of panels, or a suff

49、icient number of prepared individual test pieces, shall be transferred to an atmosphere at one of the test temperatures described in Table 1. The adhesive to be used shall also be stored under these three temperatures respectively. BS EN 15416-5:2017EN 15416-5:2017 (E) 8 Table 1 Nominal climatic conditions and examples of pressing times Wood moisture content Temperature Pressing time % C h 9 20 1 2 4 12 15 1 2 4 12 20 1 2