1、BRITISH STANDARD BS EN 1087-1:1995 Particleboards Determination of moisture resistance Part 1: Boil test The European Standard EN 1087-1:1995 has the status of a British StandardBSEN 1087-1:1995 This British Standard, having been prepared under the directionof the Sector Board forBuilding and Civil
2、Engineering, was published underthe authority of the Standards Board and comes intoeffect on 15 June 1995 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference B/541 Draft for comment 93/10436 DC ISBN 0 580 23838 5 Committees responsible for this British S
3、tandard The preparation of this British Standard was entrusted to Technical Committee B/541, Wood-based panels, upon which the following bodies were represented: American Plywood Association Association of British Plywood and Veneer Manufacturers British Woodworking Federation Chartered Institute of
4、 Building Co-ordinator for Timber and Timber Products Council of the Forest Industries of British Columbia Department of the Environment (Building Research Establishement) Finnish Plywood International Flat Roofing Contractors Advisory Board Forestry Commission Furniture Industry Research Associatio
5、n Institution of Structural Engineers Local Authority Organizations Mineral Bonded Board Products Federation National Federation of Roofing Contractors National House-building Council National Panel Products Association Royal Institute of British Architects Structural Board Association Timber Resear
6、ch and Development Association Timber Trade Federation Wood Panel Products Federation Zurich Insurance Company Amendments issued since publication Amd. No. Date CommentsBSEN 1087-1:1995 BSI 09-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 1
7、087-1 3 List of references Inside back coverBSEN 1087-1:1995 ii BSI 09-1999 National foreword This British Standard has been prepared by Technical Committee B/541 and is the English language version of EN1087-1:1995 Particleboards Determination of moisture resistance Part 1: Boil test. EN 1087-1:199
8、5 was produced as a result of international discussion in which the United Kingdom took an active part. This method of test is not comparable with any of the methods of test given in BS1142:1989 Specification for fibre building boards, or BS5669-1:1989 Particleboard Part 1. Methods of sampling, cond
9、itioning and test, both of which will be withdrawn in due course. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity
10、 from legal obligations. Cross-references Publication referred to Corresponding British Standard EN 314-2:1993 BS EN 314 Plywood. Bonding quality Part 2:1993 Requirements EN 319:1993 BS EN 319:1993 Particleboards and fibreboards. Determination of tensile strength perpendicular to the plane of the bo
11、ard EN 325:1992 BS EN 325:1993 Wood-based panels. Determination of dimensions of test pieces Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyr
12、ight date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1087-1 February 1995 ICS 79.060.20 Descriptors: Wooden boards, fibreboards, particleboards, moisture proofing, immersion t
13、ests, boiling water, tensile strength English version Particleboards Determination of moisture resistance Part 1: Boil test Panneaux de particules Dterminationdelarsistance lhumidit Partie 1. Essai leau bouillante Spanplatten BestimmungderFeuchtebestndigkeit Teil 1. Kochprfung This European Standard
14、 was approved by CEN on 1994-10-31. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nat
15、ional standards 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 translation under the responsibility of a CEN member into its own language and n
16、otified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kin
17、gdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 Copyright reserved to CEN members Ref. No. EN 1087-1:1995 EEN 1087-1:1995 BSI 09-1999 2 Foreword This European Standard was pre
18、pared by Technical Committee CEN/TC112, Woodbased panels, of which the secretariat is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August1995, and conflicting national standards sh
19、all be withdrawn at the latest by August1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spa
20、in, Sweden, Switzerland, United Kingdom Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Principle 3 4 Apparatus 3 5 Test pieces 4 6 Procedure 5 7 Expression of results 5 8 Test report 5 Figure 1 Examples of apparatus for testing tensile strength perpendicular to the plane of the board
21、4EN 1087-1:1995 BSI 09-1999 3 1 Scope This European Standard specifies a method of test for evaluating the bond quality of particleboards, intended for use in humid conditions according to option2 of EN312-5 and EN312-7. 2 Normative references This European Standard incorporates, by dated or undated
22、 reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when inc
23、orporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN 312-5, Particleboards Specifications Part 5: Requirements for load-bearing boards for use in humid conditions 1) . EN 312-7, Particleboards Specifications Part 7: Requireme
24、nts for heavy duty load-bearing boards for use in humid conditions 1) . EN 314-2, Plywood Bonding quality Part 2: Requirements. EN 319, Particleboards and fibreboards Determination of tensile strength perpendicular to the plane of the board. EN 325, Wood-based panels Determination of dimensions of t
25、est pieces. EN 326-1, Wood-based panels Sampling, cutting and inspection Part 1: Sampling and cutting of test pieces and expression of test results. 3 Principle Tensile strength, perpendicular to the plane of the board (internal bond), is determined using test pieces which have been immersed in boil
26、ing water. 4 Apparatus 4.1 Sliding caliper A sliding caliper as specified in EN325. 4.2 Water bath Temperature controlled laboratory water bath, capable of raising the contents to boiling point at a specified rate (see6.1) and maintaining boiling for not less than 2h. 4.3 Testing machine As describe
27、d in EN319. 4.4 Testing blocks Blocks of either metal or plywood to which the test pieces are glued (seeFigure 1). Plywood blocks shall be made from beech plywood conforming to bonding class3 (exterior) of EN314-2. They shall be not less than 15mm in thickness and composed of not less than nine plie
28、s. Plywood of equivalent bending stiffness made from other species may be used. Solid wooden blocks shall not be used. When thin boards (800kg/m 3 ) are tested, metal blocks shall be used. 1) At present at the draft stage.EN 1087-1:1995 4 BSI 09-1999 5 Test pieces 5.1 Sampling Sampling and cutting o
29、f at least eight test pieces per panel shall be carried out according to the principles of EN326-1. 5.2 Dimensions As described in EN319. 5.3 Conditioning Both the test pieces and the plywood testing blocks shall be separately conditioned to constant mass in a standard climate of (20 2) C and relati
30、ve humidity of (65 5)%. Constant mass is considered to have been reached when the results of two successive weighing operations carried out at an interval of 24h do not differ by more than 0,1% of the mass. Figure 1 Examples of apparatus for testing tensile strength perpendicular to the plane of the
31、 boardEN 1087-1:1995 BSI 09-1999 5 5.4 Measurement of dimensions After conditioning, measure the length and width of each test piece according to EN325. 5.5 Bonding of the test pieces to the testing blocks Bond each test piece to testing blocks, using a suitable adhesive. The upper and lower blocks
32、shall be orientated at 90 as shown inFigure 1. Excess glue squeezed out from the glueline shall be removed before testing. When gluing, additional stresses affecting the test piece,e.g. caused by the moisture contained in the adhesive, and/or any rise in temperature, shall be avoided as far as possi
33、ble. NOTE 1The following combinations have proved suitable: epoxy resins with metal blocks epoxy resins, phenol-resorcinol resins and two component polyurethane resins with hardwood plywood blocks. NOTE 2The cleaning of metal blocks for re-use can be carried out as follows. After roughly removing th
34、e remains of the broken test pieces, the metal blocks are immersed in acetone for 12h to 24h. Thereafter, the remaining glue can be easily removed. WARNING: Acetone is highly flammable. Immersion in water shall only be carried out after the glue has had sufficient time to cure (so that rupture does
35、not occur in the glueline) and after the test pieces have had sufficient time to regain an equal distribution of moisture. During this time, the glued assembly shall be stored under controlled conditions of (65 5)% relative humidity and a temperature of (20 2) C. NOTE 3Experience has shown that equi
36、librium conditions are reached in approximately 24h if epoxy resins are used and approximately 72h if phenol-rescorcinol resins are used. 6 Procedure 6.1 Boil treatment Place the test pieces, glued to their testing blocks, in the water bath (4.2) and cover them with clean water, having a temperature
37、 of (20 5) C and a pH of7 0,5. They shall be separated from each other, and from the sides and bottom of the waterbath by at least 15mm, to allow free circulation of the water. This distance shall be maintained throughout the treatment. Renew the water at the start of each test. Heat the water to bo
38、iling point (. 100 C) over a period of (90 10)min. Continue boiling for(120 5) min. Remove and cool the test pieces. 6.2 Cooling of test pieces before testing Place and keep the test pieces in water at(20 5) C, immediately after removal from the boiling water, and leave them immersed for between1h a
39、nd 2h. Mop off excess water and test them in the wet condition. 6.3 Application of the load and measurement of failing load As described in EN319. 7 Expression of results As described in EN319. 8 Test report As described in EN326-1.6 blankBSEN 1087-1:1995 BSI 09-1999 List of references See national
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