NEN EN 13279-2 : 2014

Foreword
Introduction
1 Scope
2 Normative references
3 Test conditions and sampling
  3.1 Test atmosphere (reference test)
  3.2 Sampling
  3.3 Preparation of the sample
  3.4 Water
  3.5 Appliances and apparatus
4 Test methods for gypsum binders and gypsum plasters
  (including special purposes)
  4.1 Sieve analysis (Fineness)
      4.1.1 Apparatus
      4.1.2 Determination of particles retained on 5000
            microm sieves
      4.1.3 Determination of particles retained on 200
            microm and 100 microm sieves
  4.2 Determination of sulphur trioxide content and
      calculation of equivalent calcium sulfate
      4.2.1 Principle
      4.2.2 Apparatus
      4.2.3 Reagents
      4.2.4 Procedure
      4.2.5 Expression of results
  4.3 Determination of the water/plaster ratio
      4.3.1 Sprinkling method
      4.3.2 Dispersal method
      4.3.3 Flow table method
  4.4 Determination of the setting time
      4.4.1 Knife method
      4.4.2 Vicat cone method
  4.5 Determination of mechanical properties
      4.5.1 Apparatus
      4.5.2 Preparation of the test specimen
      4.5.3 Determination of hardness
      4.5.4 Determination of flexural strength
      4.5.5 Determination of compressive strength
  4.6 Determination of adhesion
      4.6.1 Principle
      4.6.2 Apparatus
      4.6.3 Procedure
      4.6.4 Expression of results
Annex A (informative) Water retention