Bsi bs en 12860 2001 (2002)

Unknown 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 t[.]

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

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This British Standard, having

been prepared under 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

EN 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 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 agreed 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 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period for the implementation of CE marking At the end of this co-existence period, the national standard(s) will be withdrawn In the UK, there is no corresponding national standard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 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 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 Catalogue

under the section entitled “International Standards Correspondence Index”, or

by using the “Search” facility of the BSI 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 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 European developments and promulgate them in the UK

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 indicates when the document was last issued

Amendments issued since publication

13790 Corr No 1 26 July 2002 Changes to Introduction, Table 1, footnote 1, Annex ZA and Figure ZA.1

EUROPÄISCHE NORM June 2001

ICS 83.180 Incorporating corrigendum February 2002

English version

Gypsum based adhesives for gypsum blocks - Definitions,

requirements and test methods

Liantscolles à base de plâtre pour carreaux de plâtre

-Définitions, spécifications et méthodes d'essai

Gipskleber für Gips-Wandbauplatten - Definitionen, Anforderungen und Prüfverfahren

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 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 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 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 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

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E FÜ R N O R M U N G

Management Centre: 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 E

page

Foreword 3

1 Scope 5

2 Normative references 5

3 Terms and definitions 6

4 Symbols and abbreviations 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 methods 8

6.1 General 8

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 measurement 9

6.9 Test reports 10

7 Evaluation of conformity 10

7.1 General 10

7.2 Initial type testing 11

7.3 Factory production control testing 11

8 Marking, labelling and packaging 11

Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directive 12

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 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 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 CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound 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

Figure 1 shows the relationship between this standard and the package of standards 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 elements

- etc

(A3)

Gypsum plasters

(B1 to B8) Gypsum plasters forspecial 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 Standard

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 :

¾ reaction to fire ;

¾ 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

This European Standard covers also additional technical characteristics that are of importance for the use and acceptance of the product by the Building Industry :

¾ direct airborne sound insulation ;

¾ bond strength ;

¾ thermal resistance calculated with thermal conductivity values from the Table 1 (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 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 materials and products – Hygrothermal properties – Tabulated design values.

EN ISO 140-3, Acoustics – Measurement of sound insulation 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 6946, 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 13501-1 : 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)

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 main component

4 Symbols and abbreviations

For the purposes of this European standard, the following symbols apply :

¾ r gross dry density in kilograms per cubic metre (kg/m3);

¾ l thermal conductivity in Watts per metre per kelvin (W/m.K);

¾ l23-50 thermal 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

5.1.1 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 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 additives 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 according to EN ISO 140-3 and EN ISO 717-1

5.3.1 Thermal resistance

When required, the thermal 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 manufacture of gypsum based adhesives are given in Table 1 The same values can be used for adhesives

Table 1 — Design values of thermal conductivity of gypsum plaster

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 residue on a 200 mm 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 mm sieve

The SO3 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

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 £ pH £ 10,5

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 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 prEN 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

The 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 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 dynamometer for determining the tensile strength with a capacity of 250 daN (e.g see figure 2);

e) a quick setting epoxy adhesive ;

f) 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