1. High Alumina Cement
It is the cement obtained by grinding high alumina clinker. This has a long initial setting time, high ultimate strength, high resistance to the action of acids and high temperature. This cement is used for furnace insulation, refractory concrete and for special structures which require imperviousness and corrosion resistance.
2. Masonry Cement
It is a product obtained by inter-grinding a mixture of Portland Cement clinker with inert materials (non-pozzolanic) and gypsum and air entraining plasticiser. This type of cement is characterised by certain physical properties, such as slow hardening, high workability and high water retentivity, which makes it especially suitable for masonry work.
3. Oil-well Cement
This is hydraulic cement which contains retarders in addition to coarser grinding and/or reduced tricalcium aluminate content of clinker. This is suitable for use in high pressure and temperature.
4. Quick-setting Cement
This cement is produced by adding a certain quantity of aluminium sulphate and reducing the quantity of gypsum and a fine powder is made. This cement is used for under-water concreting.
5. Expanding Cement
This cement is obtained by adding an expanding medium like sulpho-aluminate and a stabilising agent to ordinary cement. Unlike conventional cement that shrinks, it expands during curing. This cement is used for repairing concrete surfaces.
6. Acid-resistant Cement
Materials like quartz, sodium silicate and sodium fluo silicate are added to the cement to attain an acid-resistant quality. It is used in the chemical industry.
7. White Cement
This type of cement does not contain colouring ingredients such as iron oxide, manganese oxide or chromium oxide, and the cement is burnt by oil. It is used for floor finish, plastering, pointing of masonry, manufacture of precast stones, tiles, runway markings and colour cement.
8. Coloured Cement
The desired colour for the cement can be obtained by initially mixing colouring materials with it. It is used for the external finishing of walls and floors, manufacturing of tiles and precast stones, and is also used for garden paths, swimming pools and tennis courts.
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