1、BS EN 15425:2017Adhesives One componentpolyurethane (PUR) for load-bearing timber structures Classification and performancerequirementsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 15425:2017 BRITISH STANDARDNational forewordThis British Standard is the UK im
2、plementation of EN 15425:2017. It supersedes BS EN 15425:2008 which is withdrawn.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 request to its secretary.This publication does not p
3、urport 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 85712 6ICS 83.180Compliance with a British Standard cannot confer immunity fromlegal obligation
4、s.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 15425:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15425 January 2017 ICS 83.180 Supersedes EN
5、15425:2008English Version Adhesives - One component polyurethane (PUR) for load-bearing timber structures - Classification and performance requirements Adhsifs - Adhsifs polyurthane monocomposants (PUR) pour structures portantes en bois - Classification et exigences de performance Klebstoffe - Einko
6、mponenten-Klebstoffe auf Polyurethanbasis (PUR) fr tragende Holzbauteile - Klassifizierung und Leistungsanforderungen This European Standard was approved by CEN on 14 November 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving th
7、is 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
8、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 Aust
9、ria, 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, Serbia, Slovakia, Slovenia, Spai
10、n, 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 exploitation in any form and by any means reserved worldwide
11、 for CEN national Members. Ref. No. EN 15425:2017 EBS EN 15425:2017EN 15425:2017 (E) 2 Contents Page European foreword . 3 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms and definitions . 7 4 Classification . 8 5 Requirements 11 5.1 General . 11 5.2 Bond strength in longitudinal tensile s
12、hear test 11 5.3 Resistance to delamination 12 5.4 Tensile strength perpendicular to the glue line after climatic treatment (acid damage test) . 13 5.5 Effect of wood shrinkage on the shear strength 13 5.6 Static load test of multiple glue line specimens in compression shear 13 5.7 Creep deformation
13、 test at cyclic climate conditions with specimens loaded in bending shear 13 5.8 Long-term sustained load test at cyclic climate conditions with specimens loaded perpendicular to the glue line (“Glass house test”) . 14 6 Test methods . 14 6.1 General . 14 6.2 Determination of longitudinal tensile sh
14、ear strength 14 6.3 Determination of resistance to delamination 14 6.4 Determination of tensile strength perpendicular to the glue line after climatic treatment (acid damaged test) 14 6.5 Determination of the effect of wood shrinkage on the shear strength . 14 6.6 Static load test of multiple glue l
15、ine specimens in compression shear 14 6.7 Creep deformation test with specimens loaded in bending shear . 15 6.8 Long-term sustained load test at cyclic climate conditions with specimens loaded perpendicular to the glue line (“Glass house test”) . 15 7 Working properties of the adhesive 15 7.1 Gener
16、al . 15 7.2 Determination of initial viscosity under reference conditions . 15 7.3 Determination of open assembly time under reference conditions 15 7.4 Determination of pressing time under reference conditions 15 8 Marking and labelling . 15 Annex A (normative) Climatic treatment prior to shear tes
17、t 16 Bibliography . 17 BS EN 15425:2017EN 15425:2017 (E) 3 European foreword This document (EN 15425:2017) 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 pu
18、blication of an identical text or by 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
19、responsible for identifying any or all such patent rights. This document supersedes EN 15425:2008. Compared to EN 15425:2008, the following main changes have been made: a) terms and definitions have been written in details in Clause 3, not only referring to EN 923:2015; b) a new classification syste
20、m has been introduced. 90 C test temperature and 1 mm glue line thickness are included in the test program in Clause 4. Adhesives tested for working properties according to Clause 7 will be marked with a “w” in the end of their designation code; c) general requirements for the different tests have b
21、een listed in 5.1; d) test treatment A8 (tensile/shear test at 90 ) has been introduced in 5.2, 6.2 and Annex A; e) a new test method is given in 5.8: Long-term sustained load test at cyclic climate conditions with specimens loaded perpendicular to the glue line (Glass house test EN 15416-1:2017); f
22、) the test method EN ISO 2555 has been included in 7.2; g) the necessary duration times for the test given in 5.7 have been reduced for glue line thickness 0,3 mm (General purpose adhesives). Identical duration times have been introduced for the new class “Special purpose adhesives” with 0,5 mm glue
23、 line thickness in test; h) EN 15416-2:2007, Adhesives for load bearing timber structures other than phenolic and aminoplastic Test methods Part 2: Static load test of multiple bond line specimens in compression shear has been introduced to the EN 302 series as EN 302-8:2017; i) in 5.6 - Static load
24、 test of multiple glue line specimens in compression shear - a definition is given for a failure mode which leads to a not counted sample; j) a new Clause 8 Marking and labelling has been introduced; k) a test program for adhesives with identical chemical composition except for a different amount of
25、 catalyst, has been introduced in Clause 4; l) in 5.6, a more precise description of failure modes and their influence is given. This document is one of a series dealing with one component polyurethane adhesives for use with timber structures, and is published in support of EN 1995-1-1, Eurocode 5:
26、Design of timber structures - Part 1-1: General - Common rules and rules for buildings. BS EN 15425:2017EN 15425:2017 (E) 4 The series consists of: one standard for classification and performance requirements (EN 15425:2017), seven test methods (EN 302-1, EN 302-2, EN 302-3, EN 302-4, EN 302-8:2017,
27、 EN 15416-1:2017 (“Glass house test”) and EN 15416-3:2017) used to assess the performance of adhesives after specified heat and humidity treatments, and three test methods (EN ISO 2555 (reference in EN 302-7), EN 15416-4:2017, and EN 15416-5:2017) to characterize the working properties of the adhesi
28、ves. 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, Former Yugoslav Republic of Macedonia, France
29、, 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 Kingdom. BS EN 15425:2017EN 15425:2017 (E) 5 Introduction Safety statement Persons
30、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 responsibility of the user to establish appropriate safety and health practices and to ensu
31、re 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 lead to better alternatives for these materials, they will be eliminated from this
32、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. BS EN 15425:2017EN 15425:2017 (E) 6 1 Scope This European Standard establishes a cl
33、assification for one component polyurethane (PUR) adhesives according to their suitability for use in load-bearing timber structures in defined climatic exposure conditions; it specifies performance requirements for such adhesives for the factory manufacture or factory like manufacturing of load-bea
34、ring timber structures only. It also classifies “adhesive lines” where all the products within the line have almost identical physical/chemical properties and gluing performance, but different reactivity. This European Standard only specifies the performance of adhesives for use in an environment co
35、rresponding to the defined conditions. The performance requirements of this European Standard apply to the adhesives only, not to the timber structure. This European Standard does not cover the performance of adhesives for on-site gluing (except for factory-like conditions) nor the production of woo
36、d-based panels, except solid wood panels, or modified and stabilized wood with considerably reduced swelling and shrinkage properties, e.g. such as acetylated wood, heat treated wood and polymer impregnated wood. This European Standard is primarily intended for the use of adhesive manufacturers and
37、for the use in timber structures bonded with adhesives, to assess or control the quality of adhesives. The requirements apply to the type testing of the adhesives. Production control activities are outside the scope of this European Standard. Adhesives meeting the requirements of this European Stand
38、ard are adequate for use in load-bearing timber structure, provided that the bonding process has been carried out according to an appropriate product standard. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for i
39、ts 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, Adhesives for load-bearing timber structures - Test methods - Part 1: Determination of longitudinal tensile shear
40、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 structures - Test methods - Part 3: Determination of the effect of acid damage to wood fibres by temperature and humidity c
41、ycling 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 EN 302-7, Adhesives for load-bearing timber structures - Test methods - Part 7: Determination of the working
42、life under referenced conditions EN 302-8:2017, Adhesives for load-bearing timber structures Test methods Part 8: Static load test of multiple bond line specimens in compression shear EN 923:2015, Adhesives - Terms and definitions BS EN 15425:2017EN 15425:2017 (E) 7 EN 15416-1:2017, Adhesives for lo
43、ad 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 15416-3:2017, Adhesives for load bearing timber structur
44、es other than phenolic and aminoplastic Test methods Part 3: Creep deformation test at cyclic climate conditions with specimens loaded in bending shear EN 15416-4:2017, Adhesives for load bearing timber structures other than phenolic and aminoplastic Test methods Part 4: Determination of open assemb
45、ly time under referenced conditions EN 15416-5:2017, Adhesives for load bearing timber structures other than phenolic and aminoplastic Test methods Part 5: Determination of minimum pressing time under referenced conditions EN ISO 2555:1999, Plastics - Resins in the liquid state or as emulsions or di
46、spersions - Determination of apparent viscosity by the Brookfield Test method (ISO 2555:1989) 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 one component polyurethane (PUR) adhesive isocyanate containing urethan
47、e polymers, which are cross-linked by reaction with water 3.2 service class 1 climatic conditions characterized by a moisture content in the materials corresponding to a temperature of 20 C and the relative humidity of the surrounding air only exceeding 65 % for a few weeks per year Note 1 to entry:
48、 In service class 1, which comprises typical indoor conditions, the average moisture content in most soft woods will not exceed 12 %. SOURCE: EN 1995-1-1:2004, 2.3.1.3, modified Indoor conditions added in Note 1 to entry 3.3 service class 2 climatic conditions characterized by a moisture content in
49、the materials corresponding to a temperature of 20 C and the relative humidity of the surrounding air only exceeding 85 % for a few weeks per year Note 1 to entry: In service class 2, to which most covered exterior conditions belong, the average moisture content in most soft woods will not exceed 20 %. SOURCE: EN 1995-1-1:2004, 2.3.1.3, modified Covered exterior conditions added in Note 1 to entry BS EN 15425:2017EN 15425:2017 (E) 8 3.4 service class 3 climatic conditions leading to higher moisture contents than in service class
