1、BRITISH STANDARDBS EN 634-2:2007Cement-bonded particleboards Specifications Part 2: Requirements for OPC bonded particleboards for use in dry, humid and external conditionsThe European Standard EN 634-2:2007 has the status of a British StandardICS 79.060.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43
2、g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 634-2:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 200
3、7ISBN 978 0 580 50404 4National forewordThis British Standard was published by BSI. It is the UK implementation of EN 634-2:2007. It supersedes BS EN 634-2:1997 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/541, Wood based panels.A list of organiza
4、tions represented on B/541 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendment
5、s issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 634-2February 2007ICS 79.060.20 Supersedes EN 634-2:1996 English VersionCement-bonded particleboards - Specifications - Part 2:Requirements for OPC bonded particleboards for use in dry,humid and externa
6、l conditionsPanneaux de particules lies au ciment - Exigences - Partie2 : Exigences pour les panneaux de particules lies auciment Portland ordinaire utiliss en milieux sec, humide etextrieurZementgebundene Spanplatten - Anforderungen - Teil 2:Anforderungen an Portlandzement (PZ) gebundeneSpanplatten
7、 zur Verwendung im Trocken-, Feucht- undAuenbereichThis European Standard was approved by CEN on 13 January 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alt
8、eration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by tran
9、slationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany,
10、Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagemen
11、t Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 634-2:2007: EEN 634-2:2007 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Requirements.5 4 Verification of complia
12、nce 6 5 Marking .7 Bibliography 9 EN 634-2:2007 (E) 3 Foreword This document (EN 634-2:2007) has been prepared by Technical Committee CEN/TC 112 “Wood-based panels”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publicatio
13、n of an identical text or by endorsement, at the latest by August 2007, and conflicting national standards shall be withdrawn at the latest by August 2007. This document supersedes EN 634-2:1996. The principal modifications introduced by this standard consist of a revision of the product marking req
14、uirements, clarification that external control in the factory is carried out according to EN 326-2, and clarification that inspection of an isolated lot of panels may be carried out according to EN 326-3. This standard is one of a series specifying requirements for cement-bonded particleboards: EN 6
15、34-1, Cement-bonded particleboards Specification Part 1: General requirements; EN 634-2, Cement-bonded particleboards Specifications Part 2: Requirements for OPC bonded particleboards for use in dry, humid and external conditions. According to the CEN/CENELEC Internal Regulations, the national stand
16、ards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Po
17、rtugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 634-2:2007 (E) 4 1 Scope This European Standard for cement-bonded particleboards specifies the requirements for particleboards bonded with Ordinary Portland Cement (OPC) for use in dry, humid1)and external2)condit
18、ions. Additional information on supplementary properties for certain applications is also given. NOTE 1 Boards made with cement other than OPC may comply with this Standard if test values are declared according to EN 13986. However, further parts of EN 634 may be developed in the future to cover oth
19、er types of cement or other materials. NOTE 2 Cement-bonded particleboard does not contain any asbestos fibre. 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 reference
20、s, the latest edition of the referenced document (including any amendments) applies. EN 310, Wood-based panels Determination of modulus of elasticity in bending and of bending strength EN 317, Particleboards and fibreboards Determination of swelling in thickness after immersion in water EN 318, Wood
21、 based panels Determination of dimensional changes associated with changes in relative humidity EN 319, Particleboards and fibreboards Determination of tensile strength perpendicular to the plane of the board EN 320, Fibreboards Determination of resistance to axial withdrawal of screws EN 321, Wood-
22、based panels - Determination of moisture resistance under cyclic test conditions EN 323, Wood-based panels Determination of density EN 326-1, Wood-based panels Sampling, cutting and inspection Part 1 Sampling and cutting of test pieces and expression of test results EN 326-2, Wood-based panels Sampl
23、ing, cutting and inspection Part 2: Quality control in the factory EN 634-1, Cement-bonded particleboards Specification Part 1: General requirements EN 789, Timber structures Test methods Determination of mechanical properties of wood based panels EN 1058, Wood-based panels Determination of characte
24、ristic values of mechanical properties and density EN 1128, Cement-bonded particleboards Determination of hard body impact resistance ENV 1156, Wood-based panels Determination of duration of load and creep factors 1) Humid conditions are defined in terms of service class 2 of EN 1995-1-1 which is ch
25、aracterized by moisture content in the material corresponding to a temperature of 20 C and a relative humidity of the surrounding air exceeding 85 % for only a few weeks per year. Boards of this type are suitable for use in biological hazard classes 1 and 2 of EN 335-3. 2) External conditions are de
26、fined in terms of service class 3 of EN 1995-1-1. Boards of this type are suitable for use in biological hazard classes 1, 2, 3 and 4 of EN 335-3. EN 634-2:2007 (E) 5 EN 1328, Cement bonded particleboards Determination of frost resistance EN 13986:2004, Wood-based panels for use in construction Char
27、acteristics, evaluation of conformity and marking 3 Requirements 3.1 General requirements OPC bonded particleboards shall comply with the general requirements listed in EN 634-1 and the requirements set out in Table 1 of this standard. 3.2 Specified properties The requirements in Table 1 shall be me
28、t by five percentile values (95 percentile values in the case of thickness swelling) based on the mean values for individual boards and calculated in accordance with EN 326-1. In the case of thickness swelling they shall be equal to or less than the values in Table 1 and in the case of all other pro
29、perties they shall be equal to or greater than the values in Table 1. Table 1 Requirements for specified properties Property Test method Unit Requirement (all thicknesses) Density EN 323 Kg/m3 1 000 Bending strength EN 310 N/mm2 9 Modulus of elasticity in bending EN 310 N/mm2Class 1 4 500 Class 2 4
30、000 Internal bond EN 319 N/mm20,5 Swelling in thickness 24 h EN 317 % 1,5 Internal bond after cyclic test EN 319 and EN 321 N/mm20,3 Swelling in thickness after cyclic test EN 317 and EN 321 % 1,5 If it is made known by the purchaser that the boards are intended for specific use in flooring, walls o
31、r roof-ing, the relevant performance standard EN 12871 has to be consulted. This can result in having to comply with additional requirements. NOTE 1 The values in this table for both bending strength and modulus of elasticity shall apply to test results obtained in any direction in the plane of the
32、panel. NOTE 2 With the exception of thickness swelling and the cyclic test, the values given in this table are characterized by moisture content in the material corresponding to a relative humidity of 65 % and a temperature of 20 C. 3.3 Supplementary properties For certain applications, information
33、on some of the properties listed in Table 2 can be required and where appropriate, shall be supplied by the board manufacturer. In this case all shall have been derived using the test methods listed in Table 2. EN 634-2:2007 (E) 6 Table 2 Supplementary properties and test methods Property Test metho
34、d Dimensional changes EN 318 Impact resistance EN 1128 Resistance to withdrawal of screws EN 320 Frost resistance EN 1328 Creep and duration of load ENV 1156 Structural properties (strength and stiffness) EN 789 and EN 1058 NOTE For certain applications, information on additional properties not spec
35、ified in Table 2 can be required. For example, for determining of thermal conductivity, water vapour transmission, and classification for reaction to fire, see EN 13986. 4 Verification of compliance 4.1 General Verification of compliance with this EN shall be carried out using the test methods liste
36、d in Table 1, Table 2 (where required), EN 634-1, and shall comply with the requirements of EN 13986 for panels used for construction purposes. 4.2 External control External control in the factory, if required by EN 13986, shall be carried out according to EN 326-2. Inspection of consignments shall
37、be carried out according to statistical basis. NOTE Inspection of isolated lots of panels can be carried out according to EN 326-3. 4.3 Factory production control Factory production control shall be carried out according to EN 326-2. The properties listed in Table 3 shall be controlled using interva
38、ls between tests not exceeding the intervals given. Sampling shall be carried out at random. Alternative test methods and/or unconditioned test pieces may be used if a valid correlation can be proven (see EN 326-2) with the specified test method. EN 634-2:2007 (E) 7 Table 3 Maximum intervals between
39、 tests for each production line Property Maximum interval between tests General properties: Thickness (unsanded) Thickness (sanded) Length Width Squareness Edge straightness Moisture content 8 h per thickness 2 h per thickness 2 h per thickness 2 h per thickness 2 h per thickness 2 h per thickness 8
40、 h per thickness Density Bending strength Modulus of elasticity (bending) 8 h per thickness rangea Internal bond Swelling in thickness, 24 h 24 h Internal bond after cyclic test Swelling in thickness after cyclic test One week aA thickness range is defined as any range of thicknesses extending to 6
41、mm from the preceding manufactured thickness.5 Marking 5.1 Marking boards placed on the internal market of the European Economic Area for construction purposes Boards marketed in one or more market territories of the European Union or other territories of the wider European Economic Area shall be ma
42、rked in accordance with the requirements of EN 13986, to signify compliance with that standard and denote the claim (by affixing a CE mark), that the boards are legally placed on the market in accordance with the Construction Products Directive provisions and corresponding national regulations. NOTE
43、 For full details of the above requirements for marking, either by reference to the appropriate technical class (board type) for OPC bonded particleboards or on the basis of declared property values, see clause 7 (Marking) and ZA.3 (CE Marking) of EN 13986:2004. 5.2 Positioning of the marking applie
44、d according to 5.1 The marking and the accompanying information shall be placed according to the provisions of EN 13986. 5.3 Marking of other boards Boards not marketed as mentioned in clause 5.1 shall be marked either (a) according to the requirements of clause 5.1 if acceptable to the buyer, or (b
45、) according to the relevant properties for the intended application using the elements in Table 4. EN 634-2:2007 (E) 8 5.4 All boards Whether the marking is applied according to clause 5.1 or clause 5.3, if the marking and/or the accompanying information is/are not placed on the product itself, the
46、first commercial purchasers to whom the product is delivered shall be responsible for ensuring that all relevant information, as contained in the relevant table of EN 13986, EN 634-1 or this standard, is passed to any other commercial purchaser or user to whom he or she in turn delivers the product.
47、 NOTE If CE marking is applied according to the requirements of EN 13986, the marking may only be applied by the producer or agent situated within the European Economic Area and duly authorised by the producer for that purpose. The authenticity of all product information accompanying the CE mark rem
48、ains the responsibility of the producer. 5.5 Cut-size panels In case of cut-size panels, where the first purchaser is the user of the product and where he agrees that marking (other than on the package) is unnecessary, the marking of such individual panels in the package need not be undertaken. 5.6
49、Colour coding Additionally, panels may be colour coded with two vertical white stripes and one vertical brown stripe, each 25 mm in length, applied near one corner of the board. NOTE This is in accordance with the unified system of colour coding for wood-based panels and indicates that the board is suitable for use in dry, humid and external conditions. Table 4 Marking requirements related to option (b) of 5.3 a) Manufacturers name, trademark, or identification mark b) Number of this European Standard: EN 634-2
