EN 15416-3-2017 en Adhesives for load bearing timber structures other than phenolic and aminoplastic - Test methods - Part 3 Creep deformation test at cyclic climate conditions wit.pdf

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1、BS EN 15416-3:2017Adhesives for load bearingtimber structures other thanphenolic and aminoplastic Test methodsPart 3: Creep deformation test at cyclicclimate conditions with specimens loaded inbending shearBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 15416-3

2、:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 15416-3:2017.It supersedes BS EN 15416-3:2007+A1:2010 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/52, Adhesives.A list of organizations represented on th

3、is committee can beobtained on 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 85713 3ICS 8

4、3.180Compliance with a British 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 15416-3:2017EUROPEAN STA

5、NDARD NORME EUROPENNE EUROPISCHE NORM EN 15416-3 January 2017 ICS 83.180 Supersedes EN 15416-3:2007+A1:2010English Version Adhesives for load bearing timber structures other than phenolic and aminoplastic - Test methods - Part 3: Creep deformation test at cyclic climate conditions with specimens loa

6、ded in bending shear Adhsifs pour structures portantes en bois de type autre que phnolique et aminoplaste - Mthodes dessais - Partie 3 : Essai de dformation par fluage dans des conditions climatiques cycliques avec des prouvettes charges en cisaillement par flexion Klebstoffe fr tragende Holzbauteil

7、e ausgenommen Phenolharzklebstoffe und Aminoplaste - Prfverfahren - Teil 3: Prfung der Kriechverformung unter zyklischen Klimabedingungen an Prfkrpern bei Biege-Scherbeanspruchung This European Standard was approved by CEN on 30 October 2016. CEN members are bound to comply with the CEN/CENELEC Inte

8、rnal 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

9、 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 ve

10、rsions. 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

11、, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of

12、 exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15416-3:2017 EBS EN 15416-3:2017EN 15416-3:2017 (E) 2 Contents Page European foreword . 3 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms and definitions . 6 4 Principle . 7 5 Apparatus . 7

13、5.1 Test jig . 7 5.2 Climate chamber 8 5.3 Measuring gauge 8 6 Preparation of specimens 8 6.1 General 8 6.2 Option 1 8 6.3 Option 2 . 10 7 Test procedure, evaluation and expression of results . 10 7.1 Test procedure 10 7.2 Evaluation and expression of results 11 8 Test report 12 BS EN 15416-3:2017EN

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

15、endorsement, at 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 al

16、l such patent rights. This document supersedes EN 15416-3:2007+A1:2010. Compared to EN 15416-3:2007+A1:2010, the following main modifications have been made: a) reference to EN 16254 for EPI adhesives added in the scope; b) glue line thickness to be used will be taken from EN 15425 or EN 16254; c) a

17、lternative way of making the test pieces is given in 6.2 and 6.3; d) possibility to use other climatic conditions as given in 7.1, Table 1 has been deleted; e) loads have been given a tolerance of 50 N in 7.1; f) duration times can be found in EN 15425 or in EN 16254; g) measurement of the glue line

18、 thickness in the test piece has been introduced. This document is one of a series dealing with adhesives for use with timber structures, and is published in support of product standards for bonded load-bearing timber structures. The series consists of three classification and performance requiremen

19、ts 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), together with 12 test methods (EN 302 Parts 1 to 8 and EN 15416 Parts 1 and 3 to 5). These Euro

20、pean 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 (PUR) for load-bearing timber structures Classification and performance requirements E

21、N 16254, Adhesives Emulsion polymerized isocyanate (EPI) for load-bearing timber structures Classification and performance requirements EN 302-1, Adhesives for load-bearing timber structures Test methods Part 1: Determination of longitudinal tensile shear strength BS EN 15416-3:2017EN 15416-3:2017 (

22、E) 4 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 structures Test methods Part 3: Determination of the effect of acid damage to wood fibres by temperature and humidity cycling on th

23、e 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 EN 302-5, Adhesives for load-bearing timber structures Test methods Part 5: Determination of maximum assembly time under refe

24、renced 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, Adhesives for load-bearing timber structures Test methods Part 7: Determination of the working life under referenced conditio

25、ns 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 load bearing timber structures other than phenolic and aminoplastic Test methods Part 1: Long-term tension load test perpendi

26、cular 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 other than phenolic and aminoplastic Test methods Part 3: Creep deformation test at cyclic climate conditions with specimens

27、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 under referenced conditions EN 15416-5, Adhesives for load bearing timber structures other than phenolic and aminoplastic Tes

28、t methods Part 5: Determination of minimum pressing time under referenced conditions 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 Re

29、public, 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 Kin

30、gdom. BS EN 15416-3:2017EN 15416-3:2017 (E) 5 Introduction Safety statement Persons using this European Standard should be familiar with the normal laboratory practice, if applicable. This European Standard cannot address all of the safety problems, if any, associated with its use. It is the respons

31、ibility 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 European Standard may have negative environmental impact. As technological advantages

32、 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 the user of this European Standard take care to carry out an appropriate disposal of the wastes, according to local regulation.

33、 BS EN 15416-3:2017EN 15416-3:2017 (E) 6 1 Scope This European Standard specifies a method for determining the creep deformation of bonded specimens loaded in bending shear. It is applicable to adhesives used in load bearing timber structures. It is suitable for the following applications: a) for as

34、sessing the compliance of adhesives to EN 15425 and EN 16254; b) for assessing the suitability and quality of adhesives for load bearing timber structures. This test is intended primarily to obtain performance data for the classification of adhesives for load bearing timber structures according to t

35、heir 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 The following documents, in whole or in part, are normatively refer

36、enced 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 301, Adhesives, phenolic and aminoplastic, for load-bearing timber stru

37、ctures Classification and performance requirements EN 923:2015, Adhesives Terms and definitions EN 15425:2017, Adhesives One component polyurethane (PUR) for load-bearing timber structures Classification and performance requirements EN 16254:2013+A1:2016, Adhesives Emulsion polymerized isocyanate (E

38、PI) for load-bearing timber structures Classification and performance requirements 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 relative creep value ( )defkt time-dependent increase of the deformation of one sp

39、ecimen Note 1 to entry: By means of the deflection w (t) and the initial deflection w (0), the relative creep value is calculated using Formula (1). ( )( )=def()0wtkwt (1) where ( )wt is the deflection at time t; BS EN 15416-3:2017EN 15416-3:2017 (E) 7 ( )0w is the initial deflection immediately aft

40、er initial loading, measured 1 min after the loading of the individual specimen; def()k t is the relative creep value. 3.2 ratio of relative creep i()Rc t ratio of the relative creep values ( )defktof two matched specimens, tested adhesive, i and PRF, i, at time t Note 1 to entry: By means of( )defk

41、t, tested adhesive, i and ( )defkt, PRF, i within one pair of matched bending specimens, i, the ratio of relative creep is calculated using Formula (2). ( )( )( )=defidef, , , , k t tested adhesive iRc tk t PRF i(2) where ( )defkt, tested adhesive, i is the relative creep value of the respective tes

42、ted adhesive sample i; def()k t , PRF, i is the relative creep value of the respective phenolic-resorcinol (PRF) - sample i; ( )iRc t is the ratio of relative creep of matched pair of bending specimens i. 4 Principle Bending specimens of a constant cross-section are subjected to constant load at cyc

43、lically varying climate conditions. Specimens bonded with the adhesive to be tested are compared with specimens bonded with a PRF-adhesive conforming to the requirement of adhesive type GP-I-M as specified in EN 301. 5 Apparatus 5.1 Test jig A test jig being capable of applying a load of (2 000 50)

44、N in each loading point. The loading principle is shown in Figure 1. BS EN 15416-3:2017EN 15416-3:2017 (E) 8 Dimensions in millimetres Key A measuring gauge for the measuring of the deflection of the specimen Figure 1 Loading principle for the creep deformation test 5.2 Climate chamber A climate cha

45、mber capable of maintaining the two test climates (20 2) C and (85 5) % RH and (45 2) C and (40 5) % RH. The climate chamber shall be capable of alternating between the two test climates in 10 h. 5.3 Measuring gauge A measuring gauge enabling readings of the deflection of the specimens with an accur

46、acy of 0,01 mm, see Figure 1. 6 Preparation of specimens 6.1 General Five boards of straight grained, defect-free Norway spruce (Picea abies L.) of density (450 25) kg/m3at 12 % moisture content shall be used to manufacture a total of 5 pairs of matched bending specimens with glue line thickness acc

47、ording to EN 15425:2017, Table 2 or to EN 16254:2013+A1:2016, Table 2. 6.2 Option 1 Each board shall have a width of at least 150 mm, a length of at least 1 260 mm and a thickness of at least 33 mm, and shall be used to manufacture one pair of 2 matched bending specimens according to the scheme show

48、n in Figure 2. Each of the 2 matched bending specimens consists of 2 boards of equal sizes. Each board shall have a thickness in the bond line area of (25,0 0,1) mm after final preparation, a width of at least 75 mm before the bonding and a length of at least 625 mm before the bonding, with an angle

49、 of the growth rings between 30 and 60 (in relation to the surface to be bonded). Not more than 24 h before the bonding, the boards are planed to their final thickness and one of the two boards of each specimen is prepared at the periphery in an appropriate manner to ensure that the correct glue line thickness is achieved and to ensure that there is no loss of adhesive during the bonding of the test specimen. BS EN 15416-3:2017EN 15416-3:2017 (E) 9 NOT