1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23458-4 SANS 10183-4-1:2009Edition 1 EN 302-1:2004Edition 2SOUTH AFRICAN NATIONAL STANDARD Adhesives for wood Part 4-1:Test methods Determ
4、ination of bond strength in longitudinal tensile shear strength This national standard is the identical implementation of EN 302-1:2004 and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 P
5、retoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 10183-4-1:2009 Edition 1 EN 302-1:2004 Edition 2 Table of changes Change No. Date Scope Acknowledgement The SABS Standards Division wishes to acknowledge the valuable assistance derived from publications of the European C
6、ommittee for Standardization (CEN). National foreword This South African standard was approved by National Committee SABS SC 1010A, Adhesives for wood Adhesives for wood, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS docu
7、ment was published in November 2009. This SANS document supersedes SANS 10183:2000 (edition 1.1), in part. SANS 10183 consists of the following parts, under the general title Adhesives for wood: Part 1: Terminology and classification. Part 2: Structural applications. Part 3: Non-structural applicati
8、ons. Part 4: Test methods. SANS 10183-4, in turn, consists of the following sections: Section 1: Determination of bond strength in longitudinal tensile shear strength. Section 2: Determination of resistance to delamination. Section 3: Determination of the effect of acid damage to wood fibres by temp
9、erature and humidity cycling on the transverse tensile strength. Section 4: Determination of the effects of wood shrinkage on the shear strength. Section 5: Static load test of multiple bondline specimens in compression shear. Section 6: Determination of pH. Section 7: Resistance to creep under stat
10、ic loading for structural wood laminating adhesives used under exterior exposure conditions. EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 302-1July 2004ICS 83.180 Supersedes EN 302-1:1992English versionAdhesives for load-bearing timber structures - Test methods -Part 1: Determination of bond st
11、rength in longitudinal tensileshear strengthAdhsifs pour structures portantes en bois - Mthodesdessai - Partie 1: Dtermination de la rsistance du joint aucisaillement en traction longitudinaleKlebstoffe fr tragende Holzbauteile - Prfverfahren - Teil 1:Bestimmung der LngszugscherfestigkeitThis Europe
12、an Standard was approved by CEN on 16 April 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concern
13、ing such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own langu
14、age and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta
15、, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in an
16、y form and by any means reservedworldwide for CEN national Members.Ref. No. EN 302-1:2004: ESANS 10183-4-1:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 302-1:2004 (E) 2 Contents page Foreword3 1 Scope 4 2 Normative references 4 3 Pr
17、inciple4 4 Safety 4 5 Apparatus .4 6 Method 5 6.1 Preparation of the bonded assemblies5 6.1.1 General5 6.1.2 Thin glue lines (close contact joints).7 6.1.3 Thick glue lines (gap joints) .7 6.2 Preparation of test pieces.7 6.3 Number of test pieces .8 6.4 Treatment prior to tensile shear testing9 6.5
18、 Test procedure.9 7 Expression of results 10 8 Test report 10 8.1 The adhesive 10 8.2 Preparation of the test pieces and testing procedure .10 8.3 Test results.10 Bibliography 12 SANS 10183-4-1:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SA
19、BS .EN 302-1:2004 (E) 3 Foreword This document (EN 302-1:2004) 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 endorse
20、ment, at the latest by January 2005, and conflicting national standards shall be withdrawn at the latest by January 2005. This document supersedes EN 302-1:1992. EN 301 and EN 302 Parts 1 to 4 and Parts 6 and 7 have the following titles. EN 301 Adhesives, phenolic and aminoplastic, for load-bearing
21、timber structures Classification and performance requirements EN 302 Adhesives for lead-bearing timber structures Test methods Part 1: Determination of bond strength in longitudinal tensile shear strength Part 2: Determination of resistance to delamination (Laboratory method) Part 3: Determination o
22、f the effect of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength Part 4: Determination of the effects of wood shrinkage on the shear strength Part 6: Determination of the conventional pressing time Part 7: Determination of the conventional working lif
23、e ENV 302-5:2001 has the title Adhesives for load-bearing timber structures Test methods Part 5: Determination of the conventional assembly time. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European St
24、andard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SANS 10183-4-1:2009T
25、his s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 302-1:2004 (E) 4 1 Scope This part of EN 302 specifies a method of determining the shear strength of adhesive bonds. It is applicable to adhesives used in load-bearing timber structures. This
26、method is not intended for use to provide numerical design data, nor is it applicable to the assessment of adhesives for the manufacture of wood-based panels. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only
27、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 structures: Classification and performance requirements. ISO 5893, Rubber and plastics test equipm
28、ent Tensile, flexural and compression types (constant rate of traverse) Specification. 3 Principle The shear strength of adhesive bonds is determined by applying a longitudinal tensile force to a single lap joint with thin and thick glue lines between two rectangular wooden adherends made of beech (
29、Fagus sylvatica L). The joints are strained to rupture. 4 Safety Persons using this standard shall be familiar with normal laboratory practice. This document does not purport to address all the safety problems, if any, associated with its use. It is responsibility of the user to establish health and
30、 safety practices and to ensure compliance with any European and national regulatory conditions. 5 Apparatus The testing machine shall be either: a) a constant rate of loading machine, capable of maintaining a rate of loading of (2,0 0,5) kN/min; or b) a constant rate of traverse machine as describe
31、d in ISO 5893. The jaws of the testing machine shall grip the test pieces with a wedge action, ensure self-aligning of the test piece and prevent slippage during loading. SANS 10183-4-1:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 3
32、02-1:2004 (E) 5 6 Method 6.1 Preparation of the bonded assemblies 6.1.1 General By planing prepare two panels (see 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. All panels to be used for the same cyclic
33、treatment (including different glue line thicknessess) shall be prepared from the same board. Ensure that the angle between the growth rings and the surface to be bonded is between 30 and 90. Cut the panels across the direction of the grain to a length of at least 300 mm with the necessary allowance
34、 for cross-cutting (saw blade thickness) and along 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 test on thin glue lines (0,1 mm), use two panels of (5,0 0,1) mm thickness. For test on thick (1,0 0,1) mm) glue lines, use one (6,0
35、0,1) mm thick panel and one (5,0 0,1) mm thick panel. Make grooves (1,0 0,1) mm deep and (14 1) mm wide in the 6 mm thick panel used for testing thick glue lines as shown in Figure 1. SANS 10183-4-1:2009This s tandard may only be used and printed by approved subscription and freemailing clients of t
36、he SABS .EN 302-1:2004 (E) 6 Dimensions in millimetres Key a = (1,0 0,1) mm thickness of thick glue line b = (20,0 0,1) mm width of test piece c = grooves for thick glue line l1= (150 5) mm length of test pieces s = (5,0 0,1) mm thickness of the panels for thin glue line = 30 - 90 angle between grow
37、th ring and surface to be bonded Figure 1 Example of a bonded panel marked for division into individual test pieces NOTE When comparing strengths of an adhesive when used in thick and thin glue lines, the differences in bond strength caused by differences in the wood should be minimized. In such cas
38、es the panels to be tested are cut from the same board in the direction of the grain in the following order: two 5 mm panels for the joints with thin glue lines; one 5 mm panel for the thick glue line joint; one 6 mm panel for the thick glue line joint. The panels are usually cut slightly oversize a
39、nd planed down to the required thickness before use. SANS 10183-4-1:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 302-1:2004 (E) 7 Condition the panels at a temperature of (20 2) C and (65 5) % r.h., referred to subsequently as ”the
40、standard atmosphere 20/65”. Prepare bonded assemblies using both thin (approximately 0,1 mm) and thick (1,0 0,1) mm) glue lines. Not more than 24 h before bonding either lightly plane or lightly sand each surface to be bonded (using an abrasive paper of grain size P100 complying with the FEPA-43 doc
41、ument). Remove any dust carefully. Do not touch or soil the prepared surfaces. Comply with the adhesive manufacturers instructions regarding the processing conditions, including the preparation and application of the adhesive, the spreading of the adhesive, the open and closed assembly time and the
42、magnitude and duration of the assembly pressure and report them in the test report. For thick glue lines only adhesives which components have been previously mixed are suitable. After adhesive application, and before pressure application, the board shall be bonded together as shown in Figure 1, ensu
43、ring that the same board is used to produce a bonded assembly joint. Bond the panels with the pressure uniformly distributed over the bonded surface. 6.1.2 Thin glue lines (close contact joints) Bond two 5 mm thick panels as shown in Figure 1 under pressure to produce a 10 mm thick bonded assembly.
44、6.1.3 Thick glue lines (gap joints) Pour the adhesive into the grooves of the grooved panel so that it will be squeezed out when pressure is applied. Assemble under pressure one 6 mm thick grooved panel with one 5 mm thick ungrooved panel, to produce an 11 mm thick bonded assembly (see Figure 1). 6.
45、2 Preparation of test pieces After bonding and pressing and before testing, condition the assembly for 7 days in the standard atmosphere 20/65. Test pieces shall be cut 3 days or more after bonding. NOTE A longer conditioning time may be used if recommended by the adhesive manufacturer. Cut five str
46、ips of width b = 20 mm from each bonded assembly along the grain, avoiding areas within 7,5 mm of the outside long edges of the panel as shown in Figure 1. Cut these strips into test pieces of length l1= (150 5) mm as shown in Figure 2. Make flat bottomed cuts of 2,5 mm width in the bonded sections
47、across the grain so that an overlap of width l2= (10,0 0,1) mm is defined in the middle section (see Figure 2) centred in the groove in test pieces on thick glue lines. The cuts are to separate the wood layers and the adhesive layer, but they shall not go beyond the adhesive layer. SANS 10183-4-1:20
48、09This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 302-1:2004 (E) 8 Dimensions in millimetres Key l1= (150 5) mm total length of test piece b = (20,0 0,1) mm width of test piece (width of tested surface) l2= (10,0 0,1) mm length of overlap
49、(length of tested surface) s = (5,0 0,1) mm thickness of the panels = 30 to 90 angle between growth ring and surface s to be bonded a = (1,0 0,1) mm thickness of the thick glue line Figure 2 Lap joint test pieces a) with thin glue line and b) with thick glue line 6.3 Number of test pieces Test a sufficient number of test pieces to provide 10 valid results for each of the treatments given in Table 1. Results from tests in which failure occurred in the wood at values below the specifie
