What is Cement? How it is made?

What is Cement?

Cement is a widely used material in the construction industry that has adhesive and cohesive properties. It is used for binding the different materials together when mixed with water in a certain proportion. 

What is Cement made up of?

The raw materials used for manufacturing of Cement are:-

  1. Calcareous materials:

Consists of mainly calcium carbonate, for example  limestone or chalk

  1. Argillaceous material:

Consists of a high percentage of clayey type minerals, for example Claystone and shale.

How Cement is manufactured?

The general process of cement manufacturing is as follows:

  1. Grinding the raw materials i.e. Calcareous and Argillaceous materials
  2. Mixing them in certain proportions depending upon their purity and composition.
  3. Burning them in a kiln at a temperature of about 1300 to 1500°C. At this temperature, the material fuses to form a nodular-shaped clinker. 
  4. The clinker is cooled and ground to a fine powder with the addition of about 3 to 5% of gypsum.

The product formed by using this procedure is called Cement or Portland cement (actual name).

What are the various cement manufacturing process?

There are three main cement manufacturing process:

  1. Dry process
  2. Wet process
  3. Semi-dry process (10%-14% water)

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