1、BRITISH STANDARD BS EN 12860:2001 Incorporating Corrigendum No. 1 Gypsum based adhesives for gypsum blocks Definitions, requirements and test methods The European Standard EN 12860:2001 has the status of a British Standard ICS 91.100.10 BS EN 12860:2001 This British Standard, having been prepared un
2、der the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 August 2001 BSI 26 July 2002 ISBN 0 580 37966 3 National foreword This British Standard is the official English language version of E
3、N 12860:2001, including Corrigendum February 2002. EN 12860 is a candidate “harmonized” European Standard and fully takes into account the requirements of the European Commission mandate M106 “Gypsum products”, given under the EU Construction Products Directive (89/106/EEC), and intended to lead to
4、CE marking. The date of applicability of EN 12860 as a harmonized European Standard, i.e. the date after which this standard may be used for CE marking purposes, is subject to an announcement in the Official Journal of the European Communities. EN 12860 is the subject of transitional arrangements ag
5、reed under the European Commission mandate. The Member States have agreed a nominal transition period for the co-existence of EN 12860 and their corresponding national standard(s). It is intended that this period will comprise a nominal nine month period during which any required changes to national
6、 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 At the end of this co-existence period, the national standard(s) will be withdrawn. In the UK, there is no corresponding national standard. The UK participation in the preparation of
7、EN 12860 was entrusted by Technical Committee B/544, Plastering, rendering, dry lining, screeds and in situ floorings, to Subcommittee B/544/1, Gypsum plasters, cast gypsum and ancillaries, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on r
8、equest 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 Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BS
9、I Electronic Catalogue or of British Standards Online. 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 does not of itself confer immunity from legal obligations. aid enquire
10、rs 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 European developments and promulgate them in the UK. Summary of pages This document comprises a
11、 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 indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 13790 Corr. No. 1 26 July 2002 Changes to Introduction, Ta
12、ble 1, footnote 1, Annex ZA and Figure ZA.1EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12860 June 2001 ICS 83.180 Incorporating corrigendum February 2002 English version Gypsum based adhesives for gypsum blocks - Definitions, requirements and test methods Liants-colles base de pltre pour ca
13、rreaux 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 comply with the CEN/CENELEC Internal Regulations which stipulate the co
14、nditions 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 Management Centre or to any CEN member. This European Standard exists in three
15、 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 official versions. CEN members are the national standards bodies of Austri
16、a, 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 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Ce
17、ntre: rue de Stassart, 36 B-1050 Brussels 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12860:2001 EPage 2 EN 12860:2001 Contents page Foreword3 1 Scope 5 2 Normative references 5 3 Terms and definitions6 4 Symbols and abbre
18、viations 6 5 Requirements.6 5.1 Fire behaviour 6 5.2 Direct airborne sound insulation .6 5.3 Thermal properties 6 5.4 Release of dangerous substances.7 5.5 Maximum particle size.7 5.6 Sulphur trioxide (SO 3 ) content .7 5.7 Initial setting time 7 5.8 Bond strength 7 5.9 pH 7 6 Test methods8 6.1 Gene
19、ral8 6.2 Determination of particle size.8 6.3 Determination of the sulphur trioxide content .8 6.4 Determination of the water/product ratio 8 6.5 Preparation of the adhesive for testing.8 6.6 Determination of the initial setting time 8 6.7 Determination of the bond strength.8 6.8 pH measurement9 6.9
20、 Test reports 10 7 Evaluation of conformity.10 7.1 General10 7.2 Initial type testing 11 7.3 Factory production control testing11 8 Marking, labelling and packaging 11 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directive12Page 3
21、 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, either by publication of an identical text or by
22、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 Association, and supports essential requirement
23、s 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 CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria
24、, 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 between this standard and the package of stand
25、ards prepared to support the family of gypsum products. Figure 1 - Family of gypsum binders and gypsum products Raw gypsum Gypsum binders for further dry powder products (A1) Gypsum binders for direct use on site (A2) Gypsum binders for further processing e.g. - blocks - plasterboards - ceiling elem
26、ents - etc. (A3) Gypsum plasters (B1 to B8) Gypsum plasters for special purposes (C1 to C6) Other dry powder products e.g. - jointing - adhesives - compounds - etc products not covered by any European Standard products covered by a European Standard products covered by this European StandardPage 5 E
27、N 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 to the essential requirements : reaction to fire ; release of dange
28、rous 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. This European Standard covers also additional technical characteristics
29、 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 (see 5.3.2). 2 Normative references This European Standard incorporates by d
30、ated 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 to or revisions of any of these publications apply to this European Standar
31、d 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 materials and products Hygrothermal properties Tabulated design values. EN ISO 140-3, Acoustics Measurement of sound in
32、sulation in buildings and of building elements Part 3 : Laboratory measurements of airborne sound insulation of building elements (ISO 140-3:1995). EN ISO 717-1, Acoustics Rating of sound insulation in buildings and of building elements Part 1 : Airborne sound insulation (ISO 717-1:1996). EN ISO 694
33、6, Building components and building elements Thermal resistance and thermal transmittance Calculation method (ISO 6946:1996). prEN 12859 : 2000, Gypsum blocks Definitions, requirements and test methods. prEN 13279-2 : 1998, Gypsum and gypsum based building plasters Part 2 : Test methods. prEN 13501-
34、1 : 2000, Fire classification of construction products and building elements Part 1 :Classification using data from reaction to fire tests. EN ISO 10456, Building materials and products Procedure for determining declared and design thermal values. (ISO 10456:1999)Page 6 EN 12860:2001 3 Terms and def
35、initions 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 main component 4 Symbols and abbreviations For the purposes of this European standard, the following
36、 symbols apply : gross dry density in kilograms per cubic metre (kg/m 3 ); thermal conductivity in Watts per metre per kelvin (W/m.K); 23-50thermal conductivity of the hardened plaster when in equilibrium at 23 C and 50 % relative humidity in Watts per metre per Kelvin (W/m.K). 5 Requirements 5.1 Fi
37、re behaviour 5.1.1 Reaction to fire Gypsum based adhesives for gypsum blocks are classified in Euroclass A1 (no contribution to fire) without testing when they contain less than 1 % by weight or volume (whichever is the more onerous) of organic material. If the products contain more than 1 % by weig
38、ht 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 additives in small quantities) for gypsum blocks do not modify the fire resistance of the work in which it
39、 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 according to EN ISO 140-3 and EN ISO 717-1. 5.3 Thermal properties 5.3.1 Thermal resistance When required, the t
40、hermal resistance of elements of construction is calculated using the formula given in EN ISO 6946. For adhesives, the values of thermal conductivity necessary for this calculation are given in 5.3.2. 5.3.2 Thermal conductivity Design values of the thermal conductivity of gypsum plaster used in the
41、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 in kg/m 3 23-50in W/(m.K) 600 0,18 700 0,22 800 0,26 900 0,30 1 000 0,34 1 100 0,39 1 200 0,43 1 300 0,47 1 400 0
42、,51 1 500 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 ISO 10456. 5.4 Release of dangerous substances NOTE For CE marking purposes, see Annex ZA. 5.5 Maximum particle size The r
43、esidue on a 200 m 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 m sieve. 5.6 Sulphur trioxide (SO 3 ) content The SO 3content of the powder shall not be less than 30 % when tested in accordance with 3.3
44、 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. 5.8 Bond strength The bond strength of the adhesive, when determined as described in 6.7, shall be such
45、 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 pH 10,5.Page 8 EN 12860:2001 6 Test methods 6.1 General General conditions of tests as well as test methods which are com
46、mon 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 coolded. 6.2 Determination of particle size The test method is described in 3.2 of prEN 13279-2 : 1998. 6.3 D
47、etermination 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 prEN 13279-2 : 1998. 6.5 Preparation of the adhesive for testing The adhesive used for the tests and for the pr
48、eparation 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 The test method is described in 4.2 of prEN 13279-2 : 1998. 6.7 Determination of the bond strength 6.7.1 Princi
49、ple 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 reactive material) of diameter 50 mm and height 5 mm ; b) a metal disc with central connection to receive traction clamp (pull head) (50 mm 20 mm) ; c) a traction device having a self centring clamp to apply a convenient tensile force ; d) a dynamome
