1、BRITISH STANDARD BS EN 382-2: 1994 Fibreboards Determination of surface absorption Part2: Test method for hardboards UDC 674.03:674.815:620.179.11BSEN382-2:1994 This BritishStandard, having been prepared under the directionof the Technical SectorBoard for Building andCivil Engineering, waspublishedu
2、nder the authorityofthe Standards Boardand comes into effecton 15February1994 BSI12-1999 The following BSI references relate to the work on this standard: Committee reference B/541 Draft for comment92/10696 DC ISBN 0 580 21862 7 Cooperating organizations The European Committee for Standardization (C
3、EN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y.
4、 France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du
5、Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation Unite
6、d Kingdom BritishStandards Institution Amendments issued since publication Amd. No. Date CommentsBSEN382-2:1994 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN382-2 3 National annex NA (informative) Committees responsible Inside bac
7、k coverBSEN382-2:1994 ii BSI 12-1999 National foreword This BritishStandard has been prepared under the direction of the Technical Sector Board for Building and Civil Engineering and is the English language version of EN382-2:1993 Fibreboards Determination of surface absorption Part2: Test method fo
8、r hardboards, published by the European Committee for Standardization. (CEN). EN382-2 was published as a result of international discussion in which the UK took an active part. There is no equivalent text to EN382-2 in the BritishStandard for fibreboards (BS1142). This standard together with a numbe
9、r of other ENs will form a comprehensive series of standards in the field of wood-based panels. 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
10、 not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages2 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments i
11、ncorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN382-2 November1993 UDC 674.03:674.815:620.179.11 Descriptors: Wooden boards, fibreboards, tests, water absorption tests, determination, porosity English version Fi
12、breboards Determination of surface absorption Part2: Test method for hardboards Panneaux de fibres Dtermination de labsorption des surfaces Partie2: Mthode dessai pour panneaux durs Faserplatten Bestimmung der Oberflchenabsorption Teil2:Prfverfahrenfr harte Platten This European Standard was approve
13、d by CEN on1993-11-02. 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 national standar
14、ds 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 notified to th
15、e 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 Kingdom. CEN Eur
16、opean Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN382-2:1993 EEN382-2:1993 BSI 12-1999 2 Foreword This European Standard was prepared by Working
17、Group3, Fibreboards (Secretariat: Italy) of CEN/TC112, Wood-based panels (Secretariat:Germany). This standard is one of a series specifying methods of test for determining the properties of fibreboards. Part1 of this standard is: EN382-1, Fibreboards Determination of surface absorption Part1: Test m
18、ethod for dry process fibreboards. No existing European Standard is superseded. 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 May1994, and conflicting national standards shall be withdrawn at th
19、e latest by December1994. In accordance with 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, Spain, Sweden, Sw
20、itzerland, UnitedKingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Principle 3 4 Apparatus 3 5 Test pieces 3 6 Procedure 3 7 Expression of results 4 8 Test report 4 Figure 1 Test apparatus (example) 4EN382-2:1993 BSI 12-1999 3 1 Scope This European Standard specifies a method fo
21、r determining the surface absorption of hardboards according to EN316. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are lis
22、ted hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the last edition of the publication referred to applies. EN316, Wood fibreboards Defin
23、ition, classification and symbols. EN322, Wood-based panels Determination of moisture content. EN325, Wood-based panels Determination of dimensions of test pieces. prEN326-1, Wood-based panels Sampling, cutting and inspection Part1: Sampling and cutting of test pieces and expression of test results.
24、 3 Principle The surface absorption of hardboards is determined by exposing the smooth surface of a test piece to water under specified conditions, and measuring the amount of water absorbed per unit area, in a specified time. The result is expressed in grams per square metre. NOTEThis test method c
25、an also be used in a similar way to determine the absorption of other liquids by some wet-process fibreboards. This is outside the scope of this standard and therefore no relevant provisions are made. 4 Apparatus 4.1 Cylinder and support The apparatus (see example in Figure 1) consists of a support(
26、9) and a metal cylinder(5) about50mm high, with an internal cross-section of(10000 50)mm 2and a minimum wall thickness of6mm. The apparatus shall be equipped with a clamping device(2) for fastening the cylinder to the test piece(7) and its support, which is covered with a rubber mat(8). The lower ed
27、ge of the cylinder shall be flat, machined smooth, and shall be equipped with a rubber seal(6). In order to avoid any water leakage between the cylinder and the test piece, the cylinder with its rubber seal is clamped onto the test piece. 4.2 Balance Balance, according to EN322. 4.3 Volumetric cylin
28、der Graduated volumetric cylinder, having a capacity of at least100ml. 5 Test pieces 5.1 Sampling Sampling and cutting of the test pieces shall be carried out according to the principles of prEN326-1. Three test pieces shall be taken per panel tested. 5.2 Dimensions The test pieces shall be square i
29、n shape, with a sidelength of(130 1)mm. 5.3 Conditioning The test pieces shall be conditioned to constant mass in an atmosphere with a relative humidity of(65 5)% and a temperature of(20 2) C. Constant mass is considered to be reached when the results of two successive weighing operations, carried o
30、ut at an interval of24h, do not differ by more than0,1% of the mass of the test piece 6 Procedure 6.1 Exposure of the test piece to water Weigh each test piece to an accuracy of0,05g. Placethe dry rubber mat on the support, followed by the test piece (Figure 1). Place the clean, dry cylinder with it
31、s rubber seal onto the test piece and clamp it into position to prevent any water leakage between the cylinder and the test piece during the test. Pour100ml of distilled water with a temperature of(20 1) C into the cylinder. Thiswill provide a water column of10mm. Leavethe test piece to absorb water
32、 via its exposed surface for(120 5)min. A temperature of(20 2) C shall be maintained throughout thetest. 6.2 Determination of water absorption After the absorption time has elapsed, pour off the water rapidly, unclamp and remove the cylinder immediately, taking care to keep the dry area of the test
33、piece out of contact with the water. Remove excess water and reweigh the test piece immediately (see6.1) to avoid loss of mass due to evaporation.EN382-2:1993 4 BSI 12-1999 7 Expression of results For each test piece, calculate the surface absorption value from the following equation: A =100(m 2 m 1
34、 ) The surface absorption of a board is the average of the results of the test pieces taken from that board. It shall be expressed to an accuracy of1g/m 2 . 8 Test report According to prEN326-1, except for moisture content and density of the test pieces. Figure 1 Test apparatus (example) where A is
35、the surface absorption (in grams per square metre); m 1 is the mass of the test piece before testing (ingrams); m 2 is the mass of the test piece after testing (ingrams).BSEN382-2:1994 BSI 12-1999 National annex NA(informative) Committees responsible The United Kingdom participation in the preparati
36、on of this European Standard was entrusted by the Technical Sector Board for Building and Civil Engineering (B/-) to Technical Committee B/541, upon which the following bodies were represented: American Plywood Association Association of British Plywood and Veneer Manufacturers British Woodworking F
37、ederation Chartered Institute of Building Co-ordinator for Timber and Timber Products Council of the Forest Industries of British Columbia Department of the Environment (Building Research Establishment) Finnish Plywood International Flat Roofing Contractors Advisory Board Forestry Commission Furnitu
38、re Industry Research Association Institution of Structural Engineers Local Authority Organizations Municipal Mutual National Federation of Roofing Contractors National House-building Council National Panel Products Association Royal Institute of British Architects Structural Board Association Timber
39、 Research and Development Association Timber Trade Federation Wood Panel Products FederationBS EN382-2: 1994 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards i
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