Chemical characterization

The composition analysis of glass is a prerequisite of the study of the bahaviour of glass in different chemical contexts :

  • The Scanning electron microscope-Emission dispersive spectroscopy allows a rapid analysis
  • The atomic absorption or the ICP (Induced coupled plasma) gives more precise analysis (for example trace elements) but is more expensive.
A wide range of tests but also our experience based on the qualification on numerous materials (more than 100 glasses and vitrified wastes tested).
Chemical durability
  • Leaching test X 31-210; dump admission test
  • powder test for the vitrified wastes description: standard XP X 30-440 - initial maximum rate of alteration Vo (or ro).
    • dynamic leaching in Soxhlet (100°C standard or modified on monolith standard XP X 30-403) or other configuration (XP X 30-450 ; XP X 30-467)
    • static leaching: weak ratio of powder surface to solution volume (S/V)
      • temperature from 20°C to 90°C: determination of the activation energies
      • controled or free pH
      • composition of the leaching solution - limit measurement of solubility and/or residual viscosity of modification: standard XP X 30-419
  • static leaching with high S/V ratio
  • modeling of long-term behaviour

The solution analysis can be carried out by photometry or ICP.

Most of these tests are used in the vitrified waste assessment procedure set up by the ADEME in order to qualify these materials in terms of storage conditions or reuse application.

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