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:-
- Calcareous materials:
Consists of mainly calcium carbonate, for example limestone or chalk
- 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:
- Grinding the raw materials i.e. Calcareous and Argillaceous materials
- Mixing them in certain proportions depending upon their purity and composition.
- 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.
- 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:
- Dry process
- Wet process
- Semi-dry process (10%-14% water)