EN 12859:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gypsum blocks - Definitions, requirements and test methodsCarreaux de plâtre - Définitions, spécifications et méthodes d'essaiGips-Wandbauplatten - Begriffe, Anforderungen und Prüfverfahren91.100.10Cement. Mavec. Apno. MaltaCement. Gypsum. Lime. Mortar01.040.91Gradbeni materiali in gradnja (Slovarji)Construction materials and building (Vocabularies)ICS:SIST EN 12859:2008en,fr,deTa slovenski standard je istoveten z:EN 12859:200801-junij-2008SIST EN 12859:2008SLOVENSKI
STANDARDSIST EN 12859:2002/A1:2004SIST EN 12859:20021DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12859April 2008ICS 91.100.10Supersedes EN 12859:2001
English VersionGypsum blocks - Definitions, requirements and test methodsCarreaux de plâtre - Définitions, spécifications et méthodesd'essaiGips-Wandbauplatten - Begriffe, Anforderungen undPrüfverfahrenThis European Standard was approved by CEN on 21 February 2008.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 alteration. 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 translationunder 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, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12859:2008: E

Sampling for independent acceptance testing carried out by the purchaser.24 Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.26 Bibliography.32

Key
Diagram 1 — Family of gypsum binders and gypsum products

insulation in buildings and of building
elements - Part 1: Airborne sound
insulation
NOTE 1 The gypsum block is a rectangular parallel piped, with tongues and grooves on at least two of their opposite edges. NOTE 2 It may be coloured by pigmentation 3.1.2 solid gypsum block gypsum block manufactured without cavities 3.1.3 cavity gypsum block gypsum block which incorporates preformed cavities 3.1.4 preformed cavity formed cavity parallel to the faces which may or may not pass completely through the block. It may run parallel with the height or the length (see Figure 1) 3.1.5 face plain and smooth surface intended to provide the finish of a partition (see Figure 1) 3.1.6 edge extreme side of the gypsum block having tongues and grooves (see Figure 1) 3.1.7 thickness distance between the two faces of a gypsum block (see Figure 1)

Key 1 Preformed cavities 2 Face 3 Thickness 4 Height 5 Length Figure 1 — Gypsum block 3.2 Symbols For the purposes of this European Standard, the following symbols apply. ρ gross dry density, in kilograms per cubic metre (kg/m3); λ thermal conductivity, in Watts per metre per Kelvin (W/m·K); λ 23-50 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); M mass of the gypsum block in kilograms (kg). 4 Requirements 4.1 Fire behaviour 4.1.1 Reaction to fire Gypsum blocks are classified in Euroclass A.1 (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 they contain 1 % or more, by weight or volume of organic material, they shall be determined and classified in accordance with EN 13501-1.

class H 3 (water absorption class).
Table 3 – Density class Colour Density class Pink a High density Natural Medium density Yellow a Low density a The visual identification by colour of the density class is only applied on class H 3 (water absorption class).
4.4.2 Gypsum blocks are manufactured in three types of density (see 4.8). Some blocks can be hydrophobic (see 4.13). 4.5 Release of dangerous substances NOTE For CE marking purposes, see Annex ZA.1 NOTE 1 and NOTE 2. 4.6 Dimensions and tolerances 4.6.1 Dimensions Gypsum block dimensions are determined by the thickness, the length and the height. The thickness shall be at least 50 mm and shall not exceed 150 mm. The length shall not exceed 1 000 mm. The height shall be determined in conjunction with the length so that the surface area of a block is at least 0,20 m2. NOTE Preferred dimensions are for thickness : 50 mm, 60 mm, 70 mm, 80 mm, 100 mm, for length : 666 mm and for height : 500 mm.

Table 4 — Breaking load of gypsum blocks Minimum average breaking load Gypsum blocks equal or longer than 650 mm with a height of 500 mm a kN Solid blocks (medium density)
Thickness in mm :
50 1,7 60 1,9 70 2,3 80 2,7 100 4,0 Cavity and low density blocks 1,7 a For gypsum blocks shorter than 650 mm and/or with a height different to 500 mm, the values in the second column shall be amended in the ratio of the spans and/or heights (see 5.7.4). No individual value shall be more than 10 % below the average load. The specimens shall be sampled in accordance with 5.1 and tested in accordance with 5.7. 4.11 Moisture content The average moisture content of gypsum blocks shall be measured at the time of the departure from the plant. The average moisture content shall not exceed 6 %, with no individual value exceeding 8 %. The specimens shall be sampled in accordance with 5.1 and tested in accordance with 5.9. 4.12 pH The surface pH of each gypsum block shall not deviate from the following prescribed values:  block with standard pH: 6,5 ≤ pH ≤ 10,5  block with low pH: 4,5 ≤ pH < 6,5 The specimens shall be sampled in accordance with 5.10.3 and tested in accordance with 5.10. 4.13 Water absorption capacity
4.13.1 Classification Gypsum blocks are rated according to their water absorption as:  Class H3: water absorption > 5 %  Class H2: water absorption ≤ 5 %  Class H1: water absorption ≤ 2,5 %.

H 1:
Blocks of low density shall have a minimum hardness of 40 Shore C units H 2:
Blocks of medium density shall have a minimum hardness of 55 Shore C units. H 3:
Blocks of high density shall have a minimum hardness of 80 Shore C units. 5 Test methods 5.1 Sampling A minimum of three gypsum blocks shall be subjected to the physical, chemical and mechanical tests (see 5.3, 5.4, 5.5, 5.6, 5.7, 5.9, 5.10). In the case of hydrophobic gypsum blocks, three further blocks shall be subjected to the water absorption test (see 5.8). 5.2 Preparation of test pieces Weigh all the blocks and then dry them to constant mass1) for determination of the residual moisture content prior to undergoing the different tests according to this standard. The drying to constant mass shall be carried out according to one of the following methods:  method A - Storage in a ventilated room at (23 ± 2) °C and (50 ± 5) % relative humidity;  method B - Storage in a drying cabinet at (40 ± 2) °C prior to cooling to room temperature. 5.3 Measurement of dimensions 5.3.1 Thickness 5.3.1.1 Principle The distance between the two faces is measured. 5.3.1.2 Apparatus A vernier caliper permitting a reading to 0,1 mm.
1) Constant mass is defined as two successive weighing 24 h apart, differing by less than 0,1%.

Figure 2 — Measurement of dimensions 5.3.2.4 Expression of results The length is the average value of the measurements.

a) measurement of distance between cavities b) measurement of distance between cavity and face Figure 3 — Measurement of the distance between cavities and between the cavity and the face

Expression of results The average mass of the gypsum blocks is the arithmetic average of the measured masses M2.
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