ISO 349:1975 Preview

Hard coal -- Audibert-Arnu dilatometer test

Specifies a method for determining the swelling properties of hard coal when heated under standard conditions in a dilatometer. In performing the method a pencil made of powdered coal formed under pressure is inserted into a precisely calibrated narrow tube and topped by a calibrated steel rod which slides in the bore of the tube. The whole is heated at a constant and definite rate. By making regular readings of the displacement of the rod as a function of the temperature and expressing the displacements observed as percentages of the original length of the penicl a curve is plotted.


General information

  • Status :  Published
    Publication date : 1975-01
  • Edition : 1
    Number of pages : 11
  • :
    ISO/TC 27/SC 5
    Methods of analysis
  • 73.040
    Coals

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