1、December 2016 English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 83.180!%hB“2596931www.din.deDIN
2、 EN 16254Adhesives Emulsion polymerized isocyanate (EPI) for loadbearing timber structures Classification and performance requirements;English version EN 16254:2013+A1:2016,English translation of DIN EN 16254:2016-12Klebstoffe Emulsionspolymerisiertes Isocyanat (EPI) fr tragende Holzbauteile Klassif
3、izierung und Leistungsanforderungen;Englische Fassung EN 16254:2013+A1:2016,Englische bersetzung von DIN EN 16254:2016-12Adhsifs Isocyanates polymriss en mulsion (EPI) pour structures portantes en bois Classification et exigences de performance;Version anglaise EN 16254:2013+A1:2016,Traduction angla
4、ise de DIN EN 16254:2016-12SupersedesDIN EN 16254:201402www.beuth.deDocument comprises 22 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.12.16 DIN EN 16254:2016-12 2 A comma is used as the decimal marker. National foreword Thi
5、s document (EN 16254:2013+A1:2016) has been prepared by Technical Committee CEN/TC 193 “Adhesives” (Secretariat: AENOR, Spain). The responsible German body involved in its preparation was DIN-Normenausschuss Holzwirtschaft und Mbel (DIN Standards Committee Timber and Furniture), Working Committee NA
6、 042-04-05 AA Spiegelausschuss zu CEN/TC 193/SC 1 Holzklebung. Amendments This standard differs from DIN EN 16254:2014-02 as follows: a) modified and stabilized wood has been excluded from the scope. Previous editions DIN EN 16254: 2014-02 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16254:2
7、013+A1 April 2016 ICS 83.180 Supersedes EN 16254:2013English Version Adhesives - Emulsion polymerized isocyanate (EPI) for load-bearing timber structures - Classification and performance requirements Adhsifs - Isocyanate polymris en mulsion (EPI) pour structures portantes en bois - Classification et
8、 exigences de performance Klebstoffe - Emulsionspolymerisiertes Isocyanat (EPI) fr tragende Holzbauteile - Klassifizierung und Leistungsanforderungen This European Standard was approved by CEN on 22 June 2013 and includes Amendment 1 approved by CEN on 9 February 2016. CEN members are bound to compl
9、y 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
10、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 sam
11、e 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,
12、 Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016
13、 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16254:2013+A1:2016 EEN 16254:2013+A1:2016 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 6 4 Classification . 7
14、 5 Requirements . 9 5.1 General 9 5.2 Bond strength in longitudinal tensile shear test . 9 5.3 Resistance to delamination 10 5.4 Tensile strength perpendicular to the glue line after climatic treatment (acid damage test) . 11 5.5 Effect of wood shrinkage on the shear strength 11 5.6 Static load test
15、 of multiple glue line specimens in compression shear 11 5.7 Creep deformation test at cyclic climate conditions with specimens loaded in bending shear 12 5.8 Long term sustained load test at cyclic climate conditions with specimens loaded perpendicular to the glue line (“Glass house test”) . 12 6 T
16、est methods . 12 6.1 General . 12 6.2 Determination of bond strength in longitudinal tensile shear test . 12 6.3 Determination of resistance to delamination 12 6.4 Determination of tensile strength perpendicular to the glue line after climatic treatment (acid damaged test) 12 6.5 Determination of th
17、e effect of wood shrinkage on the shear strength . 13 6.6 Static load test of multiple glue line specimens in compression shear 13 6.7 Creep deformation test with specimens loaded in bending shear . 14 6.8 Long term sustained load test at cyclic climate conditions with specimens loaded perpendicular
18、 to the glue line (“Glass house test”) . 14 7 Working properties of the adhesive 14 7.1 General . 14 7.2 Determination of working life under reference conditions . 14 7.3 Determination of open assembly time under reference conditions 14 7.4 Determination of pressing time under reference conditions 1
19、4 Annex A (normative) Climatic treatment prior to shear test 15 Annex B (normative) Glass house test . 16 Annex C (informative) Product limitations and glulam production control for beams produced with Small Dimension adhesives 19 Bibliography . 20 DIN EN 16254:2016-12 EN 16254:2013+A1:2016 (E) 3 Eu
20、ropean foreword This document (EN 16254:2013+A1:2016) 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
21、the latest by October 2016, and conflicting national standards shall be withdrawn at the latest by October 2016. 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
22、or all such patent rights. This document includes Amendment 1 approved by CEN on 2016-02-09. This document supersedes EN 16254:2013. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. According to the CEN/CENELEC Internal Regulations, the national st
23、andards 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,
24、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 16254:2016-12 EN 16254:2013+A1:2016 (E) 4 Introduction This document is one of a series dealing with emulsion polymerised isocyanate (EPI) adhesiv
25、es for use with timber structures, and is published in support of product standards for bonded load-bearing timber structures. The series consists of: one standard for classification and performance requirements (EN 16254), seven test methods (EN 302-1, EN 302-2, EN 302-3, EN 302-4, EN 15416-2, EN 1
26、5416-3 and the method given in Annex B of this standard (“Glass house”) used to assess the performance of adhesives after specified heat and humidity treatments, and three test methods (EN 302-7, EN 15416-4 and EN 15416-5) to characterise the working properties of the adhesive. DIN EN 16254:2016-12
27、EN 16254:2013+A1:2016 (E) 5 1 Scope This European Standard establishes a classification for emulsion polymerised isocyanate (EPI) adhesives according to their suitability for use in load-bearing timber structures in defined climatic exposure conditions, and specifies performance requirements for suc
28、h adhesives for the industrial manufacture of load-bearing timber structures only. !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 facto
29、ry-like conditions) nor the production of wood-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 inten
30、ded for the use of adhesive manufacturers and for the use in timber structures bonded with adhesives, to assess or control the quality of adhesives. This European Standard only specifies the performance of an adhesive for use in an environment corresponding to the defined conditions. Such an adhesiv
31、e meeting the requirements of this European Standard for its type is adequate for use in a 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 norm
32、atively 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, Adhesives for load-bearing timber structures Test m
33、ethods 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 structures Test methods Part 3: Determination of the effect of acid
34、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 EN 302-7, Adhesives for load-bearing timber structures Test me
35、thods Part 7: Determination of the working life under referenced conditions EN 923:2005+A1:2008, Adhesives Terms and definitions EN 15416-2, Adhesives for load bearing timber structures other than phenolic and aminoplastic Test methods Part 2: Static load test of multiple bondline specimens in compr
36、ession shear 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 loaded in bending shear DIN EN 16254:2016-12 EN 16254:2013+A1:2016 (E) 6 EN 15416-4, Adhesives for load b
37、earing timber structures other than phenolic and aminoplastic Test methods Part 4: Determination of open assembly time for one component polyurethane adhesives EN 15416-5, Adhesives for load bearing timber structures other than phenolic and aminoplastic Test methods Part 5: Determination of conventi
38、onal pressing time 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 923:2005+A1:2008, and the following, apply. 3.1 emulsion polymerised isocyanate (EPI) adhesive water based emulsion polymer or a mixture of water based emulsion polymers cross-linked w
39、ith an isocyanate as hardener 3.2 service class 1 climatic conditions characterised 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 SOURCE: EN 1995-1-1:2004, 2.3.1.3 Note 1 to
40、entry: In service class 1, which comprises typical indoor conditions, the average moisture content in most soft-woods will not exceed 12 %. 3.3 service class 2 climatic conditions characterised by a moisture content in the materials corresponding to a temperature of 20 C and the relative humidity of
41、 the surrounding air only exceeding 85 % for a few weeks per year SOURCE: EN 1995-1-1:2004, 2.3.1.3 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 %. 3.4 service class 3 climatic conditions lea
42、ding to higher moisture contents than in service class 2 SOURCE: EN 1995-1-1:2004, 2.3.1.3 Note 1 to entry: Exterior conditions typically belong to service class 3. 3.5 glue line adhesive layer between the wood members 3.6 close contact glue line (cc) glue line of thickness maximum 0,1 mm DIN EN 162
43、54:2016-12 EN 16254:2013+A1:2016 (E) 7 Note 1 to entry: Close contact glue line is achieved by pressing together two plane wood members with a clamping pressure of (0,8 0,1) N/mm2without groves, spacers or similar device. 3.7 thick glue line glue line of nominal thickness 0,3 mm to 2,0 mm Note 1 to
44、entry: Thick glue lines can be achieved by using spacers, grooves or similar devices. 4 Classification Adhesives for structural purpose shall produce joints of such strength and durability that the integrity of the bond is maintained in the assigned service class throughout the expected life of the
45、structure. EPI-adhesives according to EN 16254 are classified by Type (climate condition in use), Maximum test temperature and Maximum glue line thickness in use. These three subclasses are subdivided as follows: Type I: To be used in service class 1 and 2. Type II: To be used in service class 1 onl
46、y. Maximum test temperature: 50 C, 70 C or 90 C. Maximum glue line thickness in use: 0,1 mm, 0,2 mm and 0,3 mm. Depending on the maximum glue line thickness in use, the adhesives are assigned to different application areas as described below and shown in Table 1. General purpose adhesives: to be use
47、d for glue lines between laminations (maximum glue line thickness 0,3 mm) and for finger joints in laminations. Small dimension adhesives: to be used in beams with a maximum cross section 45 000 mm2(maximum glue line thickness 0,2 mm) and for finger joints in laminations. The beam width shall not ex
48、ceed 180 mm and the beam height shall not exceed 300 mm. Finger jointing adhesives: to be used for finger jointing of laminations and structural timber only (maximum glue line thickness 0,1 mm). The application of EPI shall always be in mixed state. These adhesives shall be applied according to the
49、manufacturers instructions. NOTE The definition of General purpose and Type could be different in other standards. DIN EN 16254:2016-12 EN 16254:2013+A1:2016 (E) 8 Table 1 Adhesive classes Adhesive type designation Application area Max. test temperature aC Max. glue line thickness mm Service classes EN 16254 I 70 0,3 Normal use General purpose 70 Test 0,5 Use 0,3 1, 2 Special use EN 16254 I 90 0,3 EN 16254 I 90 0,2
