Cement and clinker are not the same material. Cement is a binding material used in construction whereas clinker is primarily used to produce cement. The main differences between clinker and cement are given below.


1 Clinker is a nodular material which is used as the binder in cement products. Cement is a binding agent that sets and hardens to adhere to building units such as stones, bricks, tiles etc.
2 Clinker is a granular substance containing spherical pellets of diameter 3-25 mm. Cement is such a fine powdery substance that each pound of cement contains 150 billion grains.
3 Clinker is produced inside the kiln during the cement manufacturing process. Raw mix is heated and then rapidly cooled to produce the marble-sized pellets of clinker. Cement is produced by grinding clinker (added with different active ingredients to achieve the desired properties of cement) into a fine powder.
4 Composition of typical good quality clinker for general use: 37-72% of 3CaO.SiO2; 6-47% 2CaO.SiO2; 2-20% 2CaO.Al2O3; 2-19% 4CaO. Al2O3.Fe2O3

Composition of the most common type of cement: 85% clinker, 1.5-3.5% gypsum by SO3 content, and up to 15% admixtures. 

Read: 8 Main Cement Ingredients & Their Functions

5 The primary use of clinker is to manufacture cement. Cement is used in construction to make concrete as well as mortar and to secure the infrastructure by binding the building blocks. It is also used for water-proofing, filling or sealing gaps, and making decorative patterns.

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