Goseeko blog

What is Gypsum?

by Team Goseeko
  • Gypsum is one of the important and extensively used as a building material.
  • Chemically, it is the sulphate of calcium with two molecules of water.
  • It is crystalline substance very sparingly soluble in water and soluble in dilute hydrochloric acid, but it is soluble in sulphuric acid.
  • It contains 79.1% of calcium sulphate and 20.9% water.
  • In India, maximum production of it is in regions like Bikaner, Jodhpur, and Barmer districts of Rajasthan. It supply about 90% of the annual produce of country.
  • The common impurities in it are sand, chalky matter, illuminite and anhydrite.

Use of Gypsum:

Different Uses of gypsum in construction are as follows:

  1. One uses it as a retarder in portland cement. Since it controls the setting time of portland cement.
  2. It is also used as a raw material for manufacturing of ammonium sulphate and sulphuric acid.
  3. One uses it as a dental and surgical plaster and as a filler in paint, paper and rubber industries
  4.  But the important use of it is as a building material where one consumes 90% of the yearly output.

Properties of Gypsum:

The following are the various important properties:

  1. Gypsum serves as a good sound absorbers.
  2. It is Incombustible.
  3. It possess relatively small bulk density.
  4. Gypsum has ability to retard the spread of fire. Hence it can give the fire protection up to two hours.
  5. It is flexible in nature. Also it is easy to work with as any wood based products.
  6. It is light in weight and hence offer economy in structural costs and transportation.
  7. Gypsum provides smooth surface.
  8. It is a non-resonant material.
  9. It is strong, durable and dimensionally stable.

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