1、June 2013 Translation by DIN-Sprachendienst.English price group 10No 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 8
2、3.180!%2“2021504www.din.deDDIN EN 302-1Adhesives for load-bearing timber structures Test methods Part 1: Determination of longitudinal tensile shear strength;English version EN 302-1:2013,English translation of DIN EN 302-1:2013-06Klebstoffe fr tragende Holzbauteile Prfverfahren Teil 1: Bestimmung d
3、er Lngszugscherfestigkeit;Englische Fassung EN 302-1:2013,Englische bersetzung von DIN EN 302-1:2013-06Adhsifs pour structures en bois Mthodes dessais Partie 1: Dtermination de la rsistance du joint au cisaillement en traction longitudinale;Version anglaise EN 302-1:2013,Traduction anglaise de DIN E
4、N 302-1:2013-06SupersedesDIN EN 302-1:2004-10www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 16 pages 05.13 DIN EN 302-1:2013-06 2 A comma is used as the decimal marker. National foreword This document (EN 302-1:2013) has been prepared
5、by Technical Committee CEN/TC 193 “Adhesives” (Secretariat: AENOR, Spain). The responsible German body involved in its preparation was the Normenausschuss Holzwirtschaft und Mbel (Timber and Furniture Standards Committee), Working Committee NA 042-04-05 AA Spiegelausschuss zu CEN/TC 193/SC 1 Holzkle
6、bung. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 6344-2 DIN ISO 6344-2 Amendments This standard differs from DIN EN 302-1:2004-10 as follows: a) Clause 1 “Scope” has been rendered more precise; b) Clause 2 “Normative references” and C
7、lause 4 “Symbols” have been included; c) thick glue lines are now prepared with thicknesses between 0,3 mm and 2,0 mm depending on type of adhesive; d) more detailed instructions are now given on how to prepare thick glue lines; e) the condition period for bonded assemblies has been increased. Previ
8、ous editions DIN 68141: 1969-10 DIN EN 302-1: 1992-08, 2004-10 National Annex NA (informative) Bibliography DIN ISO 6344-2, Coated abrasives Grain size analysis Part 2: Determination of grain size distribution of macrogrits P 12 to P 220 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 302-1 Mar
9、ch 2013 ICS 83.180 Supersedes EN 302-1:2004English Version Adhesives for load-bearing timber structures - Test methods - Part 1: Determination of longitudinal tensile shear strength Adhsifs pour structures en bois - Mthodes dessais - Partie 1: Dtermination de la rsistance du joint au cisaillement en
10、 traction longitudinale Klebstoffe fr tragende Holzbauteile - Prfverfahren - Teil 1: Bestimmung der Lngszugscherfestigkeit 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 givin
11、g 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 offic
12、ial 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
13、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, S
14、weden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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 nationa
15、l Members. Ref. No. EN 302-1:2013: EEN 302-1:2013 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 6 2 Normative references 6 3 Terms and definitions .6 4 Symbols 7 5 Principle 7 6 Apparatus .7 7 Method 7 7.1 Preparation of panels 7 7.2 Preparation of the bonded assemblies8 7.2.1 Wood adherend
16、s and bonding procedure 8 7.2.2 Close contact glue .9 7.2.3 Thick glue lines (gap joints) .9 7.3 Preparation of test pieces .9 7.4 Number of test pieces 10 7.5 Treatment prior to tensile shear testing . 10 7.6 Test procedure 11 8 Expression of results . 12 9 Test report . 12 9.1 The adhesive . 12 9.
17、2 Preparation of test pieces and testing procedure . 12 9.3 Test results 12 Bibliography . 14 DIN EN 302-1:2013-06 EN 302-1:2013 (E) 3 Foreword This document (EN 302-1:2013) has been prepared by Technical Committee CEN/TC 193 “Adhesives”, the secretariat of which is held by AENOR. This European Stan
18、dard 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
19、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 302-1:2004. The following modifications have been made: Two new clauses (Terms and definitions and Symbols) are introduced
20、 in this revised standard; Thick glue line is now prepared with thicknesses between 0,3 mm and 2,0 mm depending on type of adhesive; There has been given more detailed instructions on how to prepare thick glue line; The condition period for bonded assemblies has been increased. According to the CEN-
21、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
22、, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 302-1:2013-06 EN 302-1:2013 (E) 4 Introduction This document is one of a series dealing with adhesive
23、s 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 po
24、lyurethane adhesives (EN 15425) and emulsion polymerised isocyanate adhesives (prEN 16254), together with 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 str
25、uctures Classification and performance requirements EN 15425, Adhesives One component polyurethane for load bearing timber structures Classification and performance requirements prEN 16254, Adhesives Emulsion polymerized isocyanate (EPI) for load-bearing timber structures Classification and performa
26、nce 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
27、 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
28、 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
29、 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
30、 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. DIN EN 302-1:2013-06 EN 302-1:2013 (E) 5 Environmental statement It is understood that some of
31、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 st
32、andard take care to carry out an appropriate disposal of the wastes, according to local regulations. DIN EN 302-1:2013-06 EN 302-1:2013 (E) 6 1 Scope This European Standard specifies a method for determining the shear strength of adhesive bonds in close contact glue line and thick glue line. It is s
33、uitable 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. This test is intended primarily to obtain performance data for the classification o
34、f adhesives for load-bearing timber structures according to their suitability for use in defined climatic environments. This method is not intended for use to provide for structural design, and does not necessarily represent the performance of the bonded member in service. 2 Normative references The
35、 following documents, 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 301, Ad
36、hesives, phenolic and aminoplastic, for load-bearing timber structures Classification and performance requirements EN 923:2005+A1:2008, Adhesives Terms and definitions ISO 5893, Rubber and plastics test equipment Tensile, flexural and compression types (constant rate of traverse) Specification ISO 6
37、344-2, Coated abrasives Grain size analysis Part 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 923:2005+A1:2008 and the following apply. 3.1 glue line adhesive layer between the w
38、ood members 3.2 thick glue line glue line of nominal thickness in the range of 0,3 mm to 2,0 mm at the time of bonding Note 1 to entry: Thick glue lines are achieved by using spacers, grooves or similar devices with a thickness of 0,3 mm to 2,0 mm when two plain members are glued together. 3.3 close
39、 contact glue line glue line of thickness maximum 0,1 mm DIN EN 302-1:2013-06 EN 302-1:2013 (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/mm without additional grooves, spacers or similar devices. 4 Symb
40、ols A bonded test surface, in mm; fvshear strength, in N/mm; Fmaxthe applied load at failure, in N; h depth of groove for thick glue line, 0,3 mm, 0,5 mm, 1,0 mm or 2,0 mm; angle between the annual growth rings and bonded surface, 30 to 85; l1length of test pieces, (150 5) mm; l2length of overlap (l
41、ength of tested surface), (10,0 0,1) mm; l3width of groove for thick glue line, 14 mm; b width of test pieces, (20,0 0,1) mm; t thickness of panel for close contact glue line, (5,0 0,1) mm; t + h thickness of panel outside the grooves for thick glue line, in mm. 5 Principle The shear strength of adh
42、esive bonds is determined by applying a longitudinal tensile force to a single lap joint with close contact or thick glue lines between two rectangular wooden adherends made of beech (Fagus sylvatica L). The joints are loaded to rupture. 6 Apparatus The testing machine shall be either: a) capable of
43、 maintaining a constant rate of loading of (2,0 0,5) kN/min; or b) 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. 7 Method 7.1 P
44、reparation of panels By planing, prepare a sufficient number (see 7.4) of panels to be bonded, with or without 14 mm wide grooves as shown in Figure 1, from an untreated straight-grained board of beech (Fagus sylvatica L.) with a density of (700 50) kg/m at (12 1) % moisture content. Ensure that the
45、 angle, , between the growth rings and the surface to be bonded, see Figure 3 a), is between 30 and 85. DIN EN 302-1:2013-06 EN 302-1:2013 (E) 8 Cut the panels across the direction of the grain to a length of at least 300 mm with the necessary allowance for cross-cutting (saw blade thickness) and al
46、ong the grain to a width of at least 130 mm with the necessary allowance for the width of cut as shown in Figure 1. For tests on close contact glue lines, use two panels of (5,0 0,1) mm. For tests on thick glue lines, use one (5,0 0,1) mm thick panel and one (5,0 0,1)+h mm thick panel. Make grooves
47、with a depth h between 0,3 mm and 2,0 mm and a width of approximately 14 mm that end 5 mm from the side edges (see Figure 1). Condition the panels at a temperature of (20 2) C and (65 5) % RH, referred to subsequently as “the standard climate”. Dimensions in millimeters Key h depth of groove for thi
48、ck glue line b width of test pieces, (20,0 0,1) mm l1length of test pieces, (150 5) mm l3width of groove for thick glue line, 14 mm (l3=0 for close contact glue lines) t thickness of panel for close contact glue line, (5,0 0,1) mm t + h thickness of panel outside the grooves for thick glue line, in mm Figure 1 Example of a bonded panel marked for division into individual test pieces 7.2 Preparation of the bonded assemblie
