Loss on ignition is a test used in inorganic analytical chemistry, particularly in the analysis of minerals. It consists of strongly heating (“igniting”) a sample of the material at a specified temperature, allowing volatile substances to escape, until its mass ceases to change. This may be done in air, or in some other reactive or inert atmosphere.

  1. 10 gm of cement is taken on platinum crucible and heated up to a temperature of 900 to 1000°C for 15 minutes
  2. The loss due to moisture and carbon dioxide causes weight loss which should not be more than 5% for all cements
  3. A high loss on ignition can indicate pre-hydration and carbonation, which may be caused by improper and prolonged storage or adulteration during transport or transfer

Standard Test Methods:

  • The test for loss on ignition is performed in accordance with ASTM C 114 & AASHTO T 105

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