Types of Cement

Following are the different types of cements which are used in construction works.

1. Portland Pozzulana Cement

Portland pozzulana is a volcanic powder found in Italy. It Can be processed from shells and certain types of clay also.

2. Low Heat Cement

Low heat cement is manufactured by increasing the proportion of C2S and by decreasing the C3S and C3A content. This cement is less reactive and its initial setting time is greater than OPC.

3. Rapid Hardening Cement

Rapid hardening cement is very similar to ordinary Portland cement(opc). It contains higher C3s content and finer grinding. The strength of this cement at the age of 3 days is almost same as the 7 days strength of OPC with the same water-cement ratio.

4. Sulphate Resisting Cement

Sulfate resisting cement is made by reducing C3A and C4AF content. Cement with such composition has excellent resistance to sulfateb attack.

5. White Cement

White cement is a type of ordinary Portland cement which is pure white in colour and has practically the same composition and same strength as OPC. The raw materials which are used in this cement are limestone and china clay.

6. Hydrophobic Cement

Hydrophobic cement is manufactured by adding water reppelant chemicals to ordinary Portland cement in the process of grinding. This cement is claimed to remain unaffected when transported during monsoon.

7. Colored Cement

This cement is produced by adding 5-10% mineral pigments with Portland cement during the time of grinding.

8. Portland Blast Furnance Cement

In this case, the normal cement clinkers are mixed with upto 65% of the blast furnance slag for the final grinding. This type of cement can be used in mass concrete work such as dams, foundations and construction in sea water.

9. Air Entraining Cement

It is produced by air entraining agents such as resins, glues, sodium salts of sulfate with ordinary Portland cement.

10. High Alumina Cement

High alumina cement (HAC) is a special cement, manufactured by mixing of bauxite (aluminum ore) and lime at a certain temperature. This cement is also known as calcium aluminum cement (CAC).

11. Water Proof Portland Cement

Waterproof cement is produced by mixing with ordinary or rapid hardening cement, a small percentage of some metal stearates (Ca, Al, etc) at the time of grinding.

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12. Expensive Cement

The Cement which does not shrink during and after the time of hardening but expands slightly with time is called expansive cement. This type of cement is mainly used for grouting anchor bolts and prestressed concrete ducts.