1、Gypsum based adhesives for gypsum blocks Definitions, requirements and test methods The European Standard EN 12860:2001 has the status ofa British Standard ICs 91.100.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 12860:2001 Incovorating Corrigendum No. I British Sta
2、ndards BS EN 12860:2001 Amd.No. 13790 Corr. No. 1 National foreword Date Comments 26 July 2002 Changes to Introduction, Table 1, footnote 1, Annex ZA and Figure ZA. 1 This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was publi
3、shed under the authority of the Standards Committee and comes into effect on 15 August 2001 This British Standard is the official English language version of EN 12860:2001, including Corrigendum February 2002. EN 12860 is a candidate “harmonized”European Standard and fully takes into account the req
4、uirements of the European Commission mandate M106 “Gypsum products”, given under the EU Construction Products Directive (89/106/EEC), and intended to lead to CE marking. The date ofapplicability of EN 12860 as a harmonized European Standard, i.e. the date after which this standard maybe used for CE
5、marking purposes, is subject to an announcement in the Oficial Journal of the European Communities. EN 12860 is the subject of transitional arrangements agreed under the European Commission mandate. The Member States have agreed a nominal transition period for the ceexistence of EN 12860 and their c
6、orresponding national standard(s). It is intended that this period will comprise a nominal nine month period during which any required changes to national regulations are to be made, followed by a further nominal twelve month period for the implementation of CE marking. At the end of this Co-existen
7、ce period, the national standard(s) will be withdrawn. In the UK, there is no corresponding national standard. The UKparticipation in the preparation ofEN 12860 was entrusted by Technical Committee B/544, Plastering, rendering, dry lining, screeds and in situ floorings, to Subcommittee B/544/1, Gyps
8、um plasters, cast gypsum and ancillaries, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and Europ
9、ean developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI C
10、atalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSIElectronic Catalogue or of British Stan dards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its
11、 correct application. Compliance with a British Standard does not ofitself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright date displayed in this document indic
12、ates when the document was last issued. Amendments issued since publication OBSI 26 July 2002 ISBN O 580 37966 3 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12860 June 2001 ICs 83.180 Incorporating corrigendum February 2002 English version Gypsum based adhesives for gypsum blocks - Definiti
13、ons, requirements and test methods Liants-colles base de pltre pour carreaux de pltre - Dfinitions, spcifications et mthodes dessai Gipskleber fr Gips-Wandbauplatten - Definitionen, Anforderungen und Prfverfahren This European Standard was approved by CEN on 16 April 2001. CEN members are bound to c
14、omply with the CENLENELEC 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 standards may be obtained on application to the Managemen
15、t 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 translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the offic
16、ial versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPI
17、SCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-I 050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12860:2001 E Page 2 EN 12860:2001 Contents Page Foreword 3 1 2 3
18、 4 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7 7.1 7.2 7.3 8 . 5 Scope Normative references . 5 Terms and definitions . . 6 Symbols and abbreviations . 6 . 6 . 6 . 6 . 7 . 7 . 7 . 7 . 7 . 7 . 8 . 8 . 8 . 8 . 8 . 8 . 8 . 8 Determination of the bond strength . . 9 . 1
19、0 Evaluation of conformity . .IO General. .IO Initial type testing .I1 .I1 Factory prod u ct i on con t ro I Marking, labelling and packaging . II Requirements . Thermal properties . 6 . Test methods General. . . Annex ZA (informative) Clauses of this European Standard addressing the provisions of t
20、he EU Construction Products Directive 12 Page 3 EN 12860:2001 Foreword This European Standard has been prepared by Technical Committee CEN/TC 241 “Gypsum and gypsum based products“, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, ei
21、ther by publication of an identical text or by endorsement, at the latest by December 2001, and conflicting national standards shall be withdrawn at the latest by March 2003. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade
22、Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are boun
23、d to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 4 EN 12860:2001 Introduction Figure 1 shows the relationship
24、 between this standard and the package of standards prepared to support the family of gypsum products. Gypsum binders for further dry powder products (Al 1 Gypsum binders for direct use on site (4 Gypsum binders for further processing e.g. - plasterboards - ceiling elements - etc. - blocks 043) I Gy
25、psum plasters (BI to B8) I - - - - - - - - - -, I Gypsum plasters for special purposes (CI toC6) -: products not covered by any European Standard n products covered by a European Standard products covered by this European Standard Other dry powder products e.g. -jointing - adhesives - compounds - et
26、c Figure 1 - Family of gypsum binders and gypsum products Page 5 EN 12860:2001 1 Scope This European Standard specifies the characteristics and performance of gypsum based adhesives used for assembling gypsum blocks or other gypsum units. It covers the following performance characteristics related t
27、o the essential requirements : - reaction to fire : - release of dangerous substances ; measured according to the corresponding European test methods. It defines the reference tests for technical specifications. It provides for the evaluation of conformity of the product to this European Standard. T
28、his European Standard covers also additional technical characteristics that are of importance for the use and acceptance of the product by the Building Industry : - direct airborne sound insulation ; - bond strength ; - thermal resistance calculated with thermal conductivity values from the Table 1
29、(see 5.3.2). 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 listed hereafter. For dated references, subsequent amendments
30、 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 latest edition of the publication referred to applies (including amendments). EN 12524, Building maferials and producfs - Hygrofhermal prope
31、ries - Tabulafed design values. EN IS0 140-3, Acousfics - Measuremenf of sound insulafion in buildings and of building elemenfs - Par 3 : Laborafory measuremenfs of airborne sound insulafion of building elemenfs (IS0 140-3:1995). EN IS0 717-1, Acousfics - Rafing of sound insulafion in buildings and
32、of building elemenfs - Par 1 : Airborne sound insulafion (IS0 717-1:1996). EN IS0 6946, Building componenfs and building elemenfs - Thermal resisfance and fhermal fransmiffance - Calculafion mefhod (IS0 6946:1996). prEN 12859 : 2000, Gypsum blocks - Definifions, requiremenfs and fesf mefhods. prEN 1
33、3279-2 : 1998, Gypsum and gypsum based building plasfers - Par 2 : Tesf mefhods. prEN 13501-1 : 2000, Fire classificafion of consfrucfion producfs and building elemenfs - Par 1 :Classificafion using dafa from reacfion fo fire fesfs. EN IS0 10456, Building maferials and producfs - Procedure for defer
34、mining declared and design fhermal values. (IS0 10456: 1999) Page 6 EN 12860:2001 3 Terms and definitions For the purposes of this European Standard, the following term and definition apply : 3.1 gypsum based adhesive mixture of calcium sulphate and additives in which the calcium sulphate is the mai
35、n component 4 Symbols and abbreviations For the purposes of this European standard, the following symbols apply : -P -h gross dry density in kilograms per cubic metre (kg/m3); thermal conductivity in Watts per metre per kelvin (W/m.K); - h,-, thermal conductivity of the hardened plaster when in equi
36、librium at 23 “C and 50 % relative humidity in Watts per metre per Kelvin (W/m.K). 5 Requirements 5.1 Fire behaviour 5.1.1 Reaction to fire Gypsum based adhesives for gypsum blocks are classified in Euroclass AI (no contribution to fire) without testing when they contain less than 1 % by weight or v
37、olume (whichever is the more onerous) of organic material. If the products contain more than 1 % by weight or volume of organic material, they shall be determined and classified in accordance with prEN 13501-1 : 2000. 5.1.2 Fire resistance Gypsum based adhesives (a mixture of calcium sulphate and ad
38、ditives in small quantities) for gypsum blocks do not modify the fire resistance of the work in which it is used. 5.2 Direct airborne sound insulation When relevant, the direct airborne sound insulation of partitions or wall linings assembled using gypsum based adhesives shall be determined accordin
39、g to EN IS0 140-3 and EN IS0 717-1. 5.3 Thermal properties 5.3.1 Thermal resistance When required, the thermal resistance of elements of construction is calculated using the formula given in EN IS0 6946. For adhesives, the values of thermal conductivity necessary for this calculation are given in 5.
40、3.2. 5.3.2 Thermal conductivity Design values of the thermal conductivity of gypsum plaster used in the manufacture of gypsum based adhesives are given in Table 1. The same values can be used for adhesives. Page 7 EN 12860:2001 Table 1 -Design values of thermal conductivity of gypsum plaster p in kg
41、/m3 600 700 800 900 1 O00 1100 1200 1300 1 400 1500 h,-, in W/( m. K) 0,18 0,22 0,26 0,30 0,34 0,39 0,43 0,47 0,51 0,56 The values given in Table 1 are taken from EN 12524. The reference values concern dry material used inside. When the material is wet, adjust these values using EN IS0 10456. 5.4 Re
42、lease of dangerous substances NOTE For CE marking purposes, see Annex ZA. 5.5 Maximum particle size The residue on a 200 ym sieve shall not be greater than 10 % by weight when determined in accordance with 3.2 of prEN 13279-2 : 1998. No residue shall be left on a 400 ym sieve. 5.6 Sulphur trioxide (
43、SOs) content The SO, content of the powder shall not be less than 30 % when tested in accordance with 3.3 of prEN 13279-2 : 1998. 5.7 Initial setting time The initial setting time shall be determined in accordance with 4.2 of prEN 13279-2 : 1998. The initial setting time shall be greater than 45 min
44、. 5.8 Bond strength The bond strength of the adhesive, when determined as described in 6.7, shall be such that failure occurs in the gypsum block, in at least three of the four tests. 5.9 pH The pH of the product after hydration, when determined in accordance with 6.8 shall be : 6,5 2 pH 2 10,5. Pag
45、e 8 EN 12860:2001 6 Test methods 6.1 General General conditions of tests as well as test methods which are common to gypsum plasters and gypsum based adhesives are described in prEN 13279-2:1998. The water used for the reference tests and chemical analysis shall be deionised or distilled, boiled and
46、 coolded. 6.2 Determination of particle size The test method is described in 3.2 of prEN 13279-2 : 1998. 6.3 Determination of the sulphur trioxide content The test method is described in 3.3 of prEN 13279-2 : 1998. 6.4 Determination of the water/product ratio The test method is described in 4.1 of p
47、rEN 13279-2 : 1998. 6.5 Preparation of the adhesive for testing The adhesive used for the tests and for the preparation of test pieces shall be prepared as described in 4.1.3 of prEN 13279-2 : 1998, using the water/product ratio determined by the test. 6.6 Determination of the initial setting time T
48、he test method is described in 4.2 of prEN 13279-2 : 1998. 6.7 Determination of the bond strength 6.7.1 Principle The bond strength is determined from the position of the failure of the gypsum based adhesive/gypsum block assembly when subjected to tensile stress. 6.7.2 Apparatus a) A ring (in non re
49、active material) of diameter 50 mm and height 5 mm ; b) a metal disc with central connection to receive traction clamp (pull head) (50 mm x 20 mm) ; c) a traction device having a self centring clamp to apply a convenient tensile force ; d) e) f) a dynamometer for determining the tensile strength with a capacity of 250 daN (e.g. see figure 2); a quick setting epoxy adhesive ; a gypsum block (according to prEN 12859 : 2000 with a thickness 50 mm : - either with a medium density - or of hardness 55 shore C units. Page 9 EN 12860:2001 Key 1 Operating device 2 Sphe
