ISO 20152-1-2010 Timber structures - Bond performance of adhesives - Part 1 Basic requirements《木结构 粘合剂粘合性能 第1部分 基本要求》.pdf

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1、 Reference number ISO 20152-1:2010(E) ISO 2010INTERNATIONAL STANDARD ISO 20152-1 First edition 2010-08-01 Timber structures Bond performance of adhesives Part 1: Basic requirements Structures en bois Performance dadhrence des adhsifs Partie 1: Exigences de base ISO 20152-1:2010(E) PDF disclaimer Thi

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5、MENT ISO 2010 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body

6、 in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedISO 20152-1:2010(E) ISO 2010 All rights reserved iiiContents Page Fore

7、word iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .2 4 Application .2 5 Requirements.3 5.1 Adhesive details, mixing and application.3 5.2 Anti-fungal properties .3 5.3 Acid damage to wood fibre.3 5.4 Shear strength and wood failure .3 5.5 Delamination resistance .5 5.6

8、Creep resistance6 6 Sample preparation and test methods 6 6.1 Anti-fungal properties .6 6.2 Acid damage to wood fibre.6 6.3 Specimen requirements6 6.4 Wood moisture content 7 6.5 Shear test and wood failure assessment7 6.6 Delamination resistance test11 6.7 Creep resistance test 12 7 Adhesive sample

9、 .22 8 Rejection.22 9 Reporting22 9.1 General .22 9.2 Product description.22 9.3 Specimen preparation and testing 23 9.4 Test results 24 Annex A (normative) Interrupting the boildry-freeze conditioning25 Annex B (normative) Measurement and computation of bond line creep for environmental test condit

10、ions A, B and C .26 Bibliography27 ISO 20152-1:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out th

11、rough ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collab

12、orates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Stan

13、dards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of

14、 this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20152-1 was prepared by Technical Committee ISO/TC 165, Timber structures. ISO 20152 consists of the following parts, under the general title Timber structures Bon

15、d performance of adhesives: Part 1: Basic requirements Part 2: Additional requirements ISO 20152-1:2010(E) ISO 2010 All rights reserved vIntroduction ISO 20152 has been developed by ISO/TC 165 to provide performance requirements for adhesive bond lines formed in structural wood products. It is large

16、ly based on the Canadian Standards Associations CSA O112.9 1and CSA O112.10 2 . These CSA-based tests for resistance to shear in the dry and wet states, resistance to delamination during exposure to wetting and drying, and resistance to creep static shear loading during exposure to high humidity, he

17、at and combined heat and moisture are designated as Method A. An alternative “pathway” to the provisions has been provided by equivalent provisions of CEN (European Committee for Standardization) standards, designated as Method B. Both the CSA and CEN standards evaluate adhesive bonds against standa

18、rdized wood species having tightly prescribed specific gravities. ISO/TC 165 is nevertheless aware that North American and European species are not readily available in many other countries. Future revisions of ISO 20152 are expected to include evaluations of bond line performance made against other

19、 species having alternative specific gravities, provided evidence is produced to show that such evaluations produce equivalent results. ISO 20152 consists of two parts: this part gives minimum requirements for adhesive bonds in all jurisdictions; ISO 20152-2 gives requirements that are specified by

20、building regulatory authorities (high temperature performance at or above 180 C) in other jurisdictions or for specific applications (gap-filling performance). In the above-mentioned Canadian standards, normative reference is made to a number of other documents, which means that they (and a standard

21、 based on them) could not be used independently of those documents. Such references have been replaced wherever possible in this part of ISO 20152 without unduly lengthening the text. Because International Standards in the wood products area are not extensive, this has not been practicable in all in

22、stances, and normative reference to CEN and ASTM (American Society for Testing and Materials) standards has been retained. The ASTM references, for example, apply only to adhesive bond requirements that are less likely to be specified or are rather lengthy. The Method A provisions for adhesives prov

23、ide assessments based on using tightly specified hardwood and/or softwood substrates; the Method B provisions, on the other hand, are confined to the use of beech substrates. The tests and provisions herein represent only a first stage of adhesive evaluation when manufacturing an adhesively bonded s

24、tructural wood product. It is anticipated that product standards will specify qualification procedures that verify the capacity of the adhesive to produce effective wood bonds, given the specific species and manufacturing processes involved. Within an international context, there are many variations

25、 in species and manufacturing practices that cannot be taken into account in an adhesive standard and thus case-by-case evaluations are essential. Creep performance criteria and tests under elevated temperatures (180 C) contained within CSA O112.9 have been removed. The matter was discussed within I

26、SO/TC 165 and it was agreed that high temperature performance (greater than 180 C) is not a requirement in all jurisdictions. A number of countries do not require the bond line itself to have a fire rating. Where a wood product (either protected or unprotected) is required to have a fire rating for

27、specific classes of building construction, the view is taken that it is the structural assembly that must be evaluated by a national fire testing standard for assessment against national building code requirements. INTERNATIONAL STANDARD ISO 20152-1:2010(E) ISO 2010 All rights reserved 1Timber struc

28、tures Bond performance of adhesives Part 1: Basic requirements 1 Scope This part of ISO 20152 specifies the basic performance requirements for adhesives used to bond structural timber components. These requirements depend upon the service conditions according to Service Classes 1, 2 and 3, as define

29、d herein. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3130, Wood D

30、etermination of moisture content for physical and mechanical tests EN 301, Adhesives, phenolic and aminoplastic, for load-bearing timber structures Classification and performance requirements EN 302-1, Adhesives for load-bearing timber structures Test methods Part 1: Determination of bond strength i

31、n 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 damage to wood fibres by tempe

32、rature and humidity cycling on the transverse tensile strength 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 compression shear EN 15425, Adhesives One component polyurethane, for l

33、oad bearing timber structures Classification and performance requirements ASTM D1583, Standard Test Method for Hydrogen Ion Concentration of Dry Adhesive Films ASTM D3535, Standard Test Method for Resistance to Creep Under Static Loading for Structural Wood Laminating Adhesives Used Under Exterior E

34、xposure Conditions ASTM D4300, Standard Test Methods for Ability of Adhesive Films to Support or Resist the Growth of Fungi ISO 20152-1:2010(E) 2 ISO 2010 All rights reserved3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Service Class 1 serv

35、ice class characterized by a moisture content in the materials corresponding to a temperature of 20 C and a relative humidity of the surrounding air exceeding 65 % for a few weeks per year NOTE In Service Class 1, the average equilibrium moisture content of most softwoods does not exceed 12 %. 3.2 S

36、ervice Class 2 service class characterized by a moisture content in the materials corresponding to a temperature of 20 C and a relative humidity of the surrounding air exceeding 85 % for a few weeks per year NOTE In Service Class 2, the average equilibrium moisture content of most softwoods does not

37、 exceed 20 %. Such conditions include resistance to the effects of moisture on structural performance due to construction delays or other conditions of similar severity. 3.3 Service Class 3 service class characterized by climatic conditions leading to higher moisture content than Service Class 2 suc

38、h as occurs when a member is fully exposed to the weather 3.4 specific gravity ratio of the oven-dry mass of a specimen to the mass of a volume of water equal to the volume of the specimen at the specified moisture content 3.5 oven-dry specific gravity expression of the specific gravity based on ove

39、n-dry mass of wood and its oven-dry volume after drying to constant mass in a ventilated oven at a temperature between 100 C and 105 C 3.6 flat-sawn timber back-sawn timber timber whose growth rings make an angle of less than 45 with its wider face 3.7 wood failure percentage percentage of wood fibr

40、e ruptured during the separation of an adhesive/adherend interface and used to evaluate the effectiveness of adhesive bonding 4 Application The adhesive bond requirements given in this part of ISO 20152 are based on the performance of the adhesive as measured by the following properties: a) resistan

41、ce to biological degradation (see 5.2); b) acid damage to wood fibre (see 5.3); c) resistance to shear in the dry and wet states (see 5.4); d) resistance to delamination during exposure to wetting and drying (see 5.5); e) resistance to creep under static shear loading during exposure to high humidit

42、y, heat and combined heat and moisture (see 5.6). ISO 20152-1:2010(E) ISO 2010 All rights reserved 3In the cases of c), d) and e), two alternative test methods are presented. Method A is based on CSA O112.9 1and Method B on equivalent European test methods. Adhesive suppliers shall choose to test ac

43、cording to either Method A or Method B for resistance to shear, resistance to delamination and resistance to creep. There shall be no mixing of Methods A and B (for example, Method A for shear resistance and Method B for delamination) nor shall retesting of the same adhesive be permitted once the ch

44、oice of the test method family (A or B) is made. 5 Requirements 5.1 Adhesive details, mixing and application The adhesive shall be mixed and applied to the wood substrate in accordance with the adhesive manufacturers specification. The adhesive mix evaluated shall contain all ingredients, including

45、fillers, catalysts, hardeners, accelerators, modifiers, inhibitors and other additives necessary for the setting or curing of the mix, provision of specific properties to the liquid (appropriate viscosity, open and closed assembly times, etc.), and development of relevant properties in the final cur

46、ed state such as minimum strength levels and creep resistance. The type and amount of fillers and/or extenders used in the adhesive shall comply with the adhesive manufacturers specification. Where the adhesive supplier specifies that adhesive and hardener are spread separately, all test specimens s

47、hall be prepared in that manner and not as a glue mix. 5.2 Anti-fungal properties If the adhesive contains amylaceous and/or protein-based components, the adhesive, when tested in accordance with 6.1, shall possess sufficient anti-fungal properties to inhibit the growth of selected fungal species to

48、 a grading of OC, OM or NG as defined in ASTM D4300. 5.3 Acid damage to wood fibre If, when tested in accordance with 6.2, the pH of the adhesive mix or, in the case of separately spread adhesive and hardener, one of its components, is less than 3, then the adhesive shall be tested in accordance wit

49、h EN 302-3 and shall meet the requirements of EN 301. 5.4 Shear strength and wood failure 5.4.1 General Depending on whether Method A or B is used, shear strength and wood failure results (if any) shall meet or exceed either the requirements of 5.4.2 or 5.4.3 respectively. 5.4.2 Method A (block shear) 5.4.2.1 General When tested in accordance with 6.5, the block shear results shall meet or exceed the shear strength requirements given in 5.4.2.2 and the percentage wood failure requirements