What is the main purpose of IS 2469?

To provide standard definitions for terms related to raw gypsum, calcined gypsum, and gypsum products to ensure uniform understanding across the industry.

Does this standard contain testing methods or material specifications?

No, it is purely a terminology standard. Testing methods are covered in codes like IS 2542.

How does the code differentiate between raw and calcined gypsum?

Raw gypsum is the naturally occurring dihydrate form, whereas calcined gypsum has been partially dehydrated by heating to form calcium sulphate hemihydrate (commonly known as Plaster of Paris).

IS 2469

: 1976

Glossary of terms relating to gypsum

CurrentSpecializedTerminologyMaterials Science · Building Limes and Gypsum Products

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This standard provides a comprehensive glossary of terms relating to gypsum, its processing, and gypsum-based building products. It serves to standardize the terminology used across the Indian construction and materials industry for clarity in specifications, manufacturing, and contracts.

Glossary of terms relating to gypsum

Practical Notes

Use this code strictly for resolving ambiguities in material definitions in tender documents or architectural specifications.

Do not use this code for physical, chemical, or performance requirements; refer to specific gypsum product codes (like IS 2095 for boards or IS 8273 for plaster) instead.