1) Ordinary portland cement

$\quad$ A) Ordinary portland cement (33 grade)

$\quad$ B) Ordinary portland cement (43grade)

$\quad$ C) Ordinary portland cement (53grade)

2) Rapid hardening cement

3) Extra rapid hardening cement

4) Sulphate resistance cement

5) Portland slag cement

6) Quick setting cement

7) Super sulphate cement

8) Low heat cement

9) Portland pozzolona cement

10) Air entraining cement

11) Colour cement, white cement

12) Hydrophobic cement

13) Masonry cement

14) Expansive cement

15) Oil well cement

16) High alumina cement

1) Ordinary portland cement

The OPC was classified into three grade namely 33 grade.43grade,53grade. Depending on strength of cement at 28 days.

When 28 days strength is not less than $33 N/mm^2$ is called as 33 grade cement.

When 28 days strength is not less than $43 N/mm^2$ is called as 33 grade cement.

When 28 days strength is not less than $53 N/mm^2$ is called as 33 grade cement.

2) Rapid hardening cement

This cement is similar to OPC. As the name indicate it develop strength rapidly and as such it may be more appropriate to call is at high early strength.

Uses of rapid hardening cement

A) In pre-fabricated concrete construction.

B) Where formwork is required to be remove early for reuse elsewhere.

C) Road repair work

3) Sulphate resistance cement

The use of sulphate resistance cement is recommended under following condition

A) Concrete to be used in marine condition.

B) Concrete to be used in foundation and basement, where soil is infested with sulphate

C) Concrete to be used in the construction on sewage treatment work.

4) Quick setting cement

The cement as the name indicate set very early. The early setting property are brought out by reducing the gypsum content at the time of clinker grinding. This cement is required to be mixed placed and compacted very early. It is only used in under water construction where pumping is involve. Use of quick setting cement in such condition reduces the pumping time and make it economical.

5) Air entraining cement

Air entraining cement is not covered by Indian standard so far. This cement is made by mixing a small amount of an air entraining agent with ordinary portland cement clinker at the time of grinding.

The following type of air entraining agent could be used.

A) Alkali salts of wood resins

B) Synthetic detergents of the alkyd-aryl sulphonate type.

C) Calcium ligno sulphate derived from the sulphate process in paper making.