NS EN 12859 : 2011

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
   3.1 Terms and definitions
   3.2 Symbols
4 Requirements
   4.1 Fire behaviour
   4.2 Direct airborne sound insulation
   4.3 Thermal properties
   4.4 Types of gypsum blocks
   4.5 Release of dangerous substances
   4.5 Dimensions and tolerances
   4.6 Flatness of gypsum blocks
   4.8 Dry density and tolerance
   4.9 Surface mass of gypsum blocks and tolerance
   4.10 Bending strength
   4.11 Moisture content
   4.12 pH
   4.13 Water absorption capacity (hydrographic
        gypsum blocks only)
   4.14 Surface hardness
5 Test methods
   5.1 Sampling
   5.2 Preparation of test pieces
   5.3 Measurement of dimensions
   5.4 Flatness of gypsum blocks
   5.5 Mass of gypsum blocks
   5.6 Density of gypsum blocks
   5.6 Bending strength
   5.8 Water absorption capacity (hydrographic
        gypsum blocks only)
   5.9 Moisture content
   5.10 pH measurement
   5.11 Test reports
6 Evaluation of conformity
   6.1 General
   6.2 Initial type testing
   6.3 Factory production control
7 Designation of gypsum blocks
8 Marking, labelling and packaging
Annex A (formative) Sampling for independent acceptance
                       testing carried out by the purchaser
Annex B (informative) Surface hardness
Annex C (informative) Visual identification by coloration of
                       gypsum blocks
Annex ZA (informative) Clauses of this European Standard
                       addressing the provisions of the EU
                       construction Products Directive
Bibliography

Describes the characteristics and performance of gypsum blocks with smooth faces for which the main intended uses are construction of non-load bearing partitions or independent wall linings and the fire protection of columns, lift shafts, shafts for services, etc. Gypsum blocks are not used to build ceilings.