1、 Reference number ISO 10033-1:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 10033-1 First edition 2011-04-15 Laminated Veneer Lumber (LVL) Bonding quality Part 1: Test methods Lamibois Qualit du collage Partie 1: Mthodes dessai ISO 10033-1:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserv
2、ed. 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 in the country of the requeste
3、r. 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 2011 All rights reservedISO 10033-1:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative re
4、ferences1 3 Test pieces .1 3.1 Sampling 1 3.2 Shape and size.1 4 Apparatus.2 5 Pre-treatment .2 5.1 Sequence of pre-treatment.2 6 Procedure.3 6.1 Test piece preparation 3 6.2 Measurement of delamination3 6.3 Alternative procedures .4 7 Expression of results4 8 Test report4 Annex A (normative) Bond t
5、esting and evaluation using the shear testing procedures (suitable for internal production control) .5 Annex B (normative) Bond testing and evaluation using the chisel/knife testing procedures (suitable for internal production control)14 ISO 10033-1:2011(E) iv ISO 2011 All rights reservedForeword IS
6、O (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 through ISO technical committees. Each member body interested in a subject for which a technical co
7、mmittee 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 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electro
8、technical 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 Standards. Draft International Standards adopted by the technical committees are circulated to the me
9、mber 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 this document may be the subject of patent rights. ISO shall not be held responsible for identif
10、ying any or all such patent rights. ISO 10033-1 was prepared by Technical Committee ISO/TC 89, Wood-based panels, Subcommittee SC 3, Plywood. ISO 10033 consists of the following parts, under the general title Laminated Veneer Lumber (LVL) Bonding quality: Part 1: Test methods Part 2: Requirements IN
11、TERNATIONAL STANDARD ISO 10033-1:2011(E) ISO 2011 All rights reserved 1Laminated Veneer Lumber (LVL) Bonding quality Part 1: Test methods 1 Scope This part of ISO 10033 specifies test methods for determining the bonding quality of Laminated Veneer Lumber (LVL) bonded with thermosetting resin. NOTE I
12、f it is possible to demonstrate a correlation between the methods defined in this part of ISO 10033 and other methods, those methods can be used. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition c
13、ited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 10033-2, Laminated Veneer Lumber (LVL) Bonding quality Part 2: Requirements ISO 12466-1, Plywood Bonding quality Part 1: Test methods ISO 12466-2, Plywood Bonding quality Part
14、2: Requirements ISO 16999, Wood-based panels Sampling and cutting of test pieces 3 Test pieces 3.1 Sampling Sampling shall be in accordance with ISO 16999. The test pieces shall be without any visible defect in the testing area. 3.2 Shape and size Each test piece shall be a (75 1) mm (75 1) mm squar
15、e and the full thickness of the LVL as shown in Figure 1. If the LVL sample is less than 75 mm across the end section, the test specimen shall have the actual width of the sample and a length of 75 mm. Permitted imperfection may be included in the test pieces. ISO 10033-1:2011(E) 2 ISO 2011 All righ
16、ts reservedKey t thickness L length w width G grain direction Figure 1 Test piece Shape and size 4 Apparatus 4.1 Temperature-controlled water bath, suitable for immersing test pieces and capable of maintaining a minimum temperature of 17 C, and/or (70 3) C. NOTE Temperature capability depends on emp
17、loyed pre-treatment cycle(s). 4.2 Boiling tank, enabling test pieces to be immersed in boiling water. 4.3 Ventilated drying oven, capable of maintaining a temperature of (60 3) C and/or (70 3) C at all points. NOTE Temperature capability depends on bonding class. 4.4 Vacuum pressure chamber, capable
18、 of maintaining in water at room temperature a vacuum of 85 kPa for 30 min followed immediately by application of pressure of (465 15) kPa for 30 min. 4.5 Autoclave, capable of maintaining steam pressure at (200 7) kPa for 6 h 15 min. 5 Pre-treatment 5.1 Sequence of pre-treatment The choice of pre-t
19、reatment, described in 5.1.1 to 5.1.7 for particular LVL bonding classes, shall be made in accordance with ISO 10033-2. ISO 10033-1:2011(E) ISO 2011 All rights reserved 35.1.1 24 h cold soak: immersion for 24 h in water at a temperature not lower than 17 C. NOTE (20 3) C can be considered as a test
20、reference temperature. 5.1.2 6 h boil: immersion for 6 h in boiling water, followed by cooling in water at less than 30 C for at least 1 h. 5.1.3 BDB (boil-dry-boil): immersion for 4 h in boiling water, then drying in the ventilated drying oven for 16 h to 20 h at (60 3) C, then immersion in boiling
21、 water for 4 h, followed by cooling in water at less than 30 C for at least 1 h. 5.1.4 VP (vacuum pressure): test specimens are immersed in water at room temperature and a vacuum of 85 kPa is applied for 30 min followed by the immediate application of a pressure of (465 15) kPa for 30 min. 5.1.5 72
22、h boil: immersion for (72 1) h in boiling water, followed by cooling in water at less than 30 C for at least 1 h. 5.1.6 Steam: specimens are placed in steam at (200 7) kPa pressure for 6 h 15 min followed by cooling for at least 1 h in water at less than 30 C. 5.1.7 Hot water soak: immersion in wate
23、r at (70 3) C for 2 h. This test is not applicable to Annex A or B. 6 Procedure 6.1 Test piece preparation After the pre-treatment, test pieces shall be processed as follows: bonding class 1: after the pre-treatment, test pieces shall be dried at a temperature of (60 3) C for 24 h, prior to evaluati
24、on; bonding class 2: after the pre-treatment, test pieces shall be dried at a temperature of (70 3) C for 24 h, prior to evaluation; bonding class 3: the pre-treatment shall be carried out twice. Test pieces shall be dried after each cycle of pre-treatment at (70 3) C for 24 h, prior to evaluation.
25、6.2 Measurement of delamination The length of delamination in each glueline on the four sides of the test piece shall be measured. Delamination of a length less than 3 mm shall be ignored. The ratio of the delamination in each single glueline to the total length of the glueline on four sides shall b
26、e determined as a percentage. The ratio of the total length of delamination on the four sides to the total length of all gluelines on four sides shall also be calculated as a percentage. The ratio of delamination shall be calculated by the following equations: Ratio of delamination (%) d,single sing
27、le g,single 100 l r l = (1) ISO 10033-1:2011(E) 4 ISO 2011 All rights reservedwhere l d,singleis the total length of delamination in a single glueline on four sides; l g,singleis the total length of a single glueline on four sides; d,total total g,total 100 l r l = (2) where l d,totalis the total le
28、ngth of delamination in all gluelines on four sides; l g,totalis the total length of all gluelines on four sides. 6.3 Alternative procedures Alternative procedures for bond testing and evaluation, the lap shear test and the knife or chisel test are provided in Annexes A and B. These procedures are d
29、eemed suitable for quality control purposes. 7 Expression of results The results shall be expressed as two ratios in percentages: 1) ratio of delamination (%) in any single glueline, 2) ratio of delamination (%) in total length of all gluelines. 8 Test report The test report shall be in accordance w
30、ith ISO 16999 and shall also contain the following information: a) ratio of delamination (%) in any single glueline; b) ratio of delamination (%) in total length of all gluelines; c) details of pre-treatment (see 5.1); d) reference to this part of ISO 10033. ISO 10033-1:2011(E) ISO 2011 All rights r
31、eserved 5Annex A (normative) Bond testing and evaluation using the shear testing procedures (suitable for internal production control) A.1 General For the evaluation of the bonding quality of LVL, apply ISO 12466-1 with the following modifications. Depending on the lay-up and the position of the lay
32、ers, the shear load shall be applied to the glueline by tension or compression of test pieces. A.2 Test pieces A.2.1 Preparation of test pieces A.2.1.1 General The making of the test pieces may require the removal of the material not to be tested and, in some cases, to bond a wood or plywood plate o
33、n the face(s) of the remaining material. It depends on: the number of plies in a layer: one or two plies in one direction and more than two plies in one direction; the position of the layer in the lay-up. A.2.1.2 Layers with one or two plies in one direction A.2.1.2.1 General The test piece design i
34、s such that the tension load is applied across the grain of the layer to be tested. A.2.1.2.2 Face layer (Figure A.1) Cut a sample of a set of test pieces in such a way so that the length of a piece shall be across the grain of the face layer. Keep the face layers and those underneath up to 15 mm an
35、d machine off the rest. Cut a plate of 15 mm LVL made of the same species. Bond this plate on the face layer of the LVL sample (the grain of the latter being at right angles to the grain of the face of the plate). This glueline shall be compatible with the pre-treatment and the shear force applied t
36、o control the resistance of the glueline of the LVL to be tested. On the LVL face, make a saw cut through it so that it reaches into the LVL face layer of the sample. On the cleared face of the test sample, make a saw cut through the opposite layers so it reaches into the LVL face layer of the sampl
37、e. ISO 10033-1:2011(E) 6 ISO 2011 All rights reservedCut the individual test pieces out of the sample. The dimensions in the plane of the test pieces are the following: distance between the closer edges of the saw cuts: (25 0,5) mm; width of the test piece: (25 0,5) mm. Total length of the test piec
38、e shall be consistent with: a shear area dimension along the load direction of 25 mm; a clearance of 50 mm, at least, between the clamps; the necessary length for its gripping. Prior to pre-treatment, condition the test pieces in the standard climate (20 2) C and (65 5) % RH so as to achieve the cur
39、ing of the bond of the plates and the equilibrium of the moisture content. Cohesive wood fibre failure (or wood fibre adhesion) shall be evaluated only on the glueline between the face layer and across the layer below. NOTE The evaluation of the wood fibre adhesion of the glueline bonding the 15 mm
40、LVL plate is not relevant. A.2.1.2.3 Core layers (Figure A.1) Considering the pair of gluelines to be tested, keep one or more layers on both sides of the layer in-between and machine off excess material on both sides; the test piece shall be nominally symmetrical. Make a saw cut so as to reach into
41、 the layer between the two gluelines to be tested. A.2.1.3 Layers with more than two plies A.2.1.3.1 General The shear strength is evaluated by applying a load along the direction of the grain of the layers to be tested. Two options are available: testing gluelines per pair; testing gluelines per se
42、ts of more than two. ISO 10033-1:2011(E) ISO 2011 All rights reserved 7Dimensions in millimetres Key aRemove these layers. bAdd these layers. cGlueline to be tested. dLayer (one or two plies) with grain across the length of test piece. eNotch. = same dimension Figure A.1 Layers with one or two plies
43、 in one direction intended for a shear A.2.1.3.2 Testing with a single pair of gluelines The shear strength is evaluated by application of a tension force along the grain of the test piece; the length of a piece shall be along the grain. Pick a pair of gluelines and cut the samples. Cut off the exce
44、ss material to make the test piece symmetrical (at least one ply shall remain on both sides of the pair of gluelines to be tested and more may be needed if the plies are thin). On each face of each sample test piece, make the saw cuts so as to reach the opposite glueline and indent into the ply beyo
45、nd, to a depth of (0,3 0,2) mm. The pair of gluelines between the bottoms of the two saw cuts shall thus be controlled (see detail in Figure A.2). Cut the individual test pieces (the dimensions in the plane of the test pieces are those already defined in A.2.1.2.2). ISO 10033-1:2011(E) 8 ISO 2011 Al
46、l rights reservedDimensions in millimetres Key = same dimension aPossible extra ply. b1 stpair. cTo be removed. d2 ndpair. e1 st . f2nd. g3rd. hTest piece. iGlueline to be tested. jNotch. Figure A.2 Layers with more than two plies Test piece with a single pair of gluelines intended for a shear test
47、by tension A.2.1.3.3 Testing with more than one pair of gluelines (Figures A.3 and A.4) The shear strength is evaluated by application of a compression force along the grain of the test piece. It is defined in Figure A.3; it is intended for a shear test by compression and its design is close to the
48、design of the standard lap-shear test. Its main features are: width: (50 1) mm; distance between nearer sides of saw cuts: (25 0,5) mm; width of saw cut: 3 mm minimum; distance d between the furthest pair of gluelines to be tested: d u 20 mm; distance between saw cut and nearer end of the test piece
49、: W 50 mm. To ensure proper loading, the cutting of the ends of the test pieces shall be such that the corresponding sections shall be square (tolerance not exceeding 1 mm per 50 mm). NOTE Although testing several pairs of gluelines at the same time appears an attractive method of improving productivity, torsional effects can produce unreliable results. For this reason, the value of d is limited
