CSA O112 10-2008 Evaluation of adhesives for structural wood products (limited moisture exposure) (First Edition Update No 1 January 2010 Update No 2 June 2010).pdf

1、O112.10-08(reaffirmed 2013)Evaluation of adhesives for structural wood products (limited moisture exposure)Legal Notice for StandardsCanadian Standards Association (CSA) standards are developed through a consensus standards development process approved by the Standards Council of Canada. This proces

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17、ny copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.Update No. 2O112.10-08June 2010Note: General Instructions for CSA Standards are now called

18、 Updates. Please contact CSA Information Products Sales or visit www.ShopCSA.ca for information about the CSA Standards Update Service.Title: Evaluation of adhesives for structural wood products (limited moisture exposure) originally published March 2008Revisions issued: Update No. 1 January 2010If

19、you are missing any updates, please contact CSA Information Products Sales or visit www.ShopCSA.ca.The following revisions have been formally approved and are marked by the symbol delta () in the margin on the attached replacement pages:Revised Clauses 2 and C.1(a)New NoneDeleted NoneCSA O112.10-08

20、originally consisted of 51 pages (ix preliminary and 42 text), each dated March 2008. It now consists of the following pages:March 2008 vix, 3, 4, 7, 8, 2126, 2932, 39, and 40January 2010 iii, iv, 5, 6, 920, 3338A, and 41 43June 2010 1, 2, 27, and 28 Update your copy by inserting these revised pages

21、.Keep the pages you remove for reference. Canadian Standards AssociationEvaluation of adhesives for structural wood products (limited moisture exposure)June 2010O112.10-08Evaluation of adhesives for structural wood products (limited moisture exposure)1 Scope1.1 This Standard specifies requirements f

22、or evaluating adhesives used to bond solid wood materials in structural wood products intended for limited moisture exposure applications.Note: See Annex D for additional information on limited exposure and other moisture exposure categories for structural wood adhesives.1.2 This Standard specifies

23、requirements for evaluating the resistance of adhesives to(a) shear caused by compression loading, under both dry and re-dry conditions;(b) delamination during accelerated exposure to wetting and drying; and(c) deformation under static shear loading during exposure to heat or high humidity.1.3 This

24、Standard is not intended for assessment of the effects of chemical treatments of wood on adhesive performance.1.4 In CSA Standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a reco

25、mmendation or that which is advised but not required; “may” is used to express an option or that which is permissible within the limits of the standard; and “can” is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the pur

26、pose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define thei

27、r application.2 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below.CSA (Canadian Standards Association)CAN/CSA-O86-01 (R2006)Engineering design in woodO112 Series-M1977 (R2006) CSA Standards for wood adh

28、esives1(Replaces p. 1, January 2010)O112.10-08 Canadian Standards AssociationJune 2010O112.0-M1977 (R2006)Definitions and standard test methods for wood adhesivesO112.7-M1977 (R2006)Resorcinol and phenol-resorcinol resin adhesives for wood (room- and intermediate-temperature curing)O112.9-10Evaluati

29、on of adhesives for structural wood products (exterior exposure)AITC (American Institute of Timber Construction)200-2004Manufacturing Quality Control Systems ManualANSI/AF(b) delamination during accelerated exposure to wetting and drying; and(c) deformation under static shear loading during exposure

30、 to heat or high humidity.1.3 This Standard is not intended for assessment of the effects of chemical treatments of wood on adhesive performance.1.4 In CSA Standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard;

31、 “should” is used to express a recommendation or that which is advised but not required; “may” is used to express an option or that which is permissible within the limits of the standard; and “can” is used to express possibility or capability. Notes accompanying clauses do not include requirements o

32、r alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informa

33、tive (non-mandatory) to define their application.2 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below.CSA (Canadian Standards Association)CAN/CSA-O86-01 (R2006)Engineering design in woodO112 Series-M1977

34、 (R2006) CSA Standards for wood adhesives1(Replaces p. 1, March 2008)O112.10-08 Canadian Standards AssociationJanuary 2010O112.0-M1977 (R2006)Definitions and standard test methods for wood adhesivesO112.7-M1977 (R2006)Resorcinol and phenol-resorcinol resin adhesives for wood (room- and intermediate-

35、temperature curing)O112.9-09Evaluation of adhesives for structural wood products (exterior exposure)AITC (American Institute of Timber Construction)200-2004Manufacturing Quality Control Systems ManualANSI/AF(b) black spruce (Picea mariana); or(c) Douglas fir (Pseudotsuga menziesii).5.3.2 Wood densit

36、y5.3.2.1 A full cross-sectional sample, approximately 25 mm long, shall be cut at least 150 mm from one end of each board used to provide specimens for the tests specified in Clauses 5.5 to 5.7.5.3.2.2 The relative density (i.e., ratio of the oven-dry mass of a wood specimen to the mass of a volume

37、of water equal to the oven-dry volume of the specimen) of each full cross-sectional specimen tested in accordance with ASTM D 2395 shall be 0.49 or greater for the species specified in Clause 5.3.1. The relative density should not exceed 0.57.Notes: (1) Relative density is also known as specific gra

38、vity.(2) To select suitable wood material for evaluation of adhesives intended for bonding wet wood, the relative density based on green volume can be determined and adjusted to oven-dry volume using the guidance in Appendix XI of ASTM D 2395. Wet wood is defined as having moisture content at or abo

39、ve the fibre saturation point.5(Replaces p. 5, March 2008)O112.10-08 Canadian Standards AssociationJanuary 20105.3.3 Wood grainFor the block shear and delamination test specimens,(a) wood having at least 8 rings per inch (per 25 mm) should be used; and(b) only flat-grained wood shall be used.Notes:

40、(1) Wood having fewer than 8 rings per inch (per 25 mm) and meeting the density requirements might not achieve the percentage wood failure when tested.(2) Lumber is considered flat grained when growth rings make an angle of less than 45 with the woods wider face.5.4 Wood moisture content5.4.1 Genera

41、l5.4.1.1 Moisture content shall be determined in accordance with ASTM D 4442.5.4.1.2 The moisture content of the specimens at the time of assembly shall be as specified by the adhesive manufacturer.5.4.2 Moisture content variation5.4.2.1 The variation in moisture content of the individual specimens

42、shall not exceed 3% when their average moisture content is less than 25%.5.4.2.2 When the moisture content of all of the specimens is greater than 25% at the time of bonding, the specimens shall be designated as wet (see Clause 5.3.2.2).5.5 Block shear test and per cent wood failure assessment5.5.1

43、Preparation of test assemblies5.5.1.1 A total of six test assemblies shall be prepared for each of the tests specified in Clauses 5.5.3.2 to 5.5.3.4, three each for the minimum and maximum assembly times recommended by the adhesive manufacturer.5.5.1.2 Billets approximately 19 mm thick 65 mm wide 35

44、0 mm along the grain shall be prepared from lumber of a length suitable for planing and meeting the requirements of Clause 5.3.3. The thickness of the lumber shall be such that the entire surface to be bonded can be planed. Surfaces to be bonded shall not have been sanded and shall be free of contam

45、inants.(Replaces p. 6, March 2008)6 Canadian Standards AssociationEvaluation of adhesives for structural wood products (limited moisture exposure)January 20105.5.3.4.3 The boil-dry-freeze cycle specified in Clause 5.5.3.4.2 shall be repeated a second time. Following the second cycle, the specimens s

46、hall be (a) fully submerged in boiling water for at least 4 h; (b) cooled in water at 22 5 C for 1 h; (c) dried at 71 2 C until they are within 6% or less of their original weight; and(d) be conditioned at 20 2 C and 65 5% relative humidity for at least 2 d. Each specimen shall be weighed prior to t

47、esting in shear.Notes: (1) Care should be taken to minimize drying when specimens are transferred to the cool water bath. This can be achieved by gradually replacing the hot water in the boil tank with cool water before removing the specimens.(2) See Annex A for guidance on accommodating interruptio

48、ns to boil-dry-freeze conditioning.(3) Drying the test specimens to 6% or less of their original weight returns the moisture content of specimens to 19% or less after the vacuum-pressure or boil-dry-freeze. This assumes that the original moisture content is 12%.5.5.3.5 Loading rate and measurements5

49、.5.3.5.1 The testing machine shall be equipped with a compression-shearing tool containing a self-aligning seat, as described in ASTM D 2559. There shall be no offset between the inner edge of the supporting surface and the plane of the adjacent edge of the loading surface. The load shall be applied with a continuous motion of the movable head at a rate not exceeding 13 mm/min. The testing machine shall be located in an atmospheric environment such that the moisture content of the specimens is not noticeably altered during testing.Note: The change