1、 Reference number ISO 10033-2:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 10033-2 First edition 2011-04-15 Laminated Veneer Lumber (LVL) Bonding quality Part 2: Requirements Lamibois Qualit du collage Partie 2: Exigences ISO 10033-2:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. U
2、nless 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 requester. IS
3、O 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 10033-2:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative referen
4、ces1 3 Bonding classes1 3.1 Class 1 Dry conditions .1 3.2 Class 2 Tropical dry/humid conditions.1 3.3 Class 3 High humid/exterior conditions.2 4 Requirements.2 4.1 General .2 4.2 Pre-treatment .2 4.3 Glueline requirements.2 5 Determination of bonding quality3 ISO 10033-2:2011(E) iv ISO 2011 All righ
5、ts 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 through ISO technical committees. Each member body interested in a subject fo
6、r 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 collaborates closely with the International Electrotechnical Commission (IEC) on
7、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 Standards. Draft International Standards adopted by the technical committees ar
8、e 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 this document may be the subject of patent rights. ISO shall not be held r
9、esponsible for identifying any or all such patent rights. ISO 10033-2 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 P
10、art 2: Requirements INTERNATIONAL STANDARD ISO 10033-2:2011(E) ISO 2011 All rights reserved 1Laminated Veneer Lumber (LVL) Bonding quality Part 2: Requirements 1 Scope This part of ISO 10033 specifies requirements for determining the bonding quality class of Laminated Veneer Lumber (LVL) bonded with
11、 thermosetting resins, according to their intended end uses. NOTE Appropriate test methods are specified in ISO 10033-1. 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
12、 references, the latest edition of the referenced document (including any amendments) applies. ISO 10033-1, Laminated Veneer Lumber (LVL) Bonding quality Part 1: Test methods ISO 12466-2, Plywood Bonding quality Part 2: Requirements ISO 18776, Laminated veneer lumber (LVL) Specifications 3 Bonding c
13、lasses Bonding quality is categorized into three classes in accordance with ISO 18776, based upon moisture resistance as follows. 3.1 Class 1 Dry conditions This bonding class is appropriate for laminated veneer lumber (LVL) intended for use in normal interior climates in which the LVL attains an eq
14、uilibrium moisture content not exceeding 12 % except for only a few weeks a year, e.g. ambient temperature of 20 C and relative humidity of 65 %. 3.2 Class 2 Tropical dry/humid conditions This bonding class is appropriate for LVL intended for use in protected external applications, e.g. roof beams o
15、r external wall studs, but capable of resisting weather exposure for short periods, e.g. when exposed during construction. It is suitable for interior situations where the service moisture condition is higher than the class 1 level. The bonding class is appropriate for conditions in which the LVL at
16、tains an equilibrium moisture content not exceeding 18 % except only for a few weeks a year, e.g. ambient temperature of 30 C and relative humidity of 85 %. ISO 10033-2:2011(E) 2 ISO 2011 All rights reserved3.3 Class 3 High humid/exterior conditions This bonding class is designed for conditions lead
17、ing to higher equilibrium moisture content than specified for tropical dry/humid conditions or prolonged exposure to weather. 4 Requirements 4.1 General For each bonding quality, after the appropriate pre-treatments specified in Table 1 of this part of ISO 10033 and the procedures specified in ISO 1
18、0033-1, the ratio of delamination (%) shall be determined for both each single glueline and the total length of all gluelines. A minimum of two test pieces per sample shall satisfy the requirements specified in this clause. For class 2 and class 3, where two pre-treatments are required, each pre-tre
19、atment shall be carried out on a separate set of two test pieces. 4.2 Pre-treatment Table 1 Pre-treatment requirements Pre-treatment Basic Additional Bonding class 24 h Cold soak (ISO 10033-1, 5.1.1) VP (vacuum pressure) (ISO 10033-1, 5.1.4) Hot water soak (ISO 10033-1, 5.1.7) 6 h Boil (ISO 10033-1,
20、 5.1.2) BDB (boil-dry-boil)(ISO 10033-1, 5.1.3) 72 h Boil (ISO 10033-1, 5.1.5) Steam (ISO 10033-1, 5.1.6) 1 X X X 2 X X X X X X 3 X X X X x One of the indicated basic pre-treatments shall be chosen, plus one of the indicated additional pre-treatments for bonding class 2 and bonding class 3. For full
21、 phenolic adhesives, when VP is used as the basic pre-treatment, an additional pre-treatment only needs to be occasionally conducted for validation purposes. 4.3 Glueline requirements For all three bonding classes each test specimen shall satisfy each of the following two criteria. Ratio of delamina
22、tion (%) in each separate individual glueline shall not exceed 25. Ratio of delamination (%) for the total length of all gluelines shall not exceed 5. NOTE Any failure in the wood is not considered to be delamination. If ISO 10033-1, Annex A (shear test) is used for each bonding class, each glueline
23、 tested shall satisfy the glueline requirements of ISO 12466-2. ISO 10033-2:2011(E) ISO 2011 All rights reserved 3If ISO 10033-1, Annex B (chisel/knife testing) is used, the average bond quality of each glueline test sample shall be a minimum of 2 and the overall bond quality for all gluelines in th
24、e test sample shall be 5. 5 Determination of bonding quality The comparison of results obtained in accordance with ISO 10033-1 and with the requirements of this part of ISO 10033 allows the determination of the bonding class for which the tested LVL belongs. ISO 10033-2:2011(E) ICS 79.060.99 Price based on 3 pages ISO 2011 All rights reserved
