Cement: Applications, Manufacturing Process, Types and Tests

pplications of the Different Types of Cement

Cement can be used alone as grouting material, but its most common application is in mortar and concrete, where it is combined with an inert substance called an aggregate. Mortar refers to cement combined with sand or crushed stones that is no larger than 5 mm in size. It finds uses in holding bricks, blocks, and stone together in buildings or as surface finish renderings.

  • Plastering, masonry construction, pointing, and other purposes.
  • Making drain and pipe joints.
  • Ensuring that construction is watertight.
  • Laying floors, roofs, beams, staircases, and pillars, among other things.
  • When a hard surface is necessary to protect exposed surfaces of structures from weather-related damage and certain organic or inorganic pollutants.
  • Production of precast pipes, piles, and fence posts, among other things.
  • Building of significant engineering constructions such as bridges, culverts, dams, tunnels, and lighthouses, among others.
  • Construction of foundations, waterproof flooring, and pathways, among other things.
  • Building wells, water tanks, lamp posts, tennis courts, telephone cabins, roads etc.

Raw Ingredients Required for Cement

Cement Manufacturing Process

Cement Manufacturing is a four-step process, that is as follows:

Grinding and crushing

Large revolving, cylindrical ball mills, or tube mills carrying steel grinding balls crush all materials except for soft materials, in two stages. Depending on the procedure, this grinding can be done wet or dry, although, for dry grinding, raw materials may need to be dried in cylindrical, rotating dryers beforehand.

Blending

In large silos, workers mix raw materials in appropriate quantities to obtain a preliminary approximation of the chemical composition necessary for a specific cement. Agitation and rapid circulation provided by compressed air ensure thorough mixing of the materials in large silos. The wet raw material slurry, which includes 35 to 45 per cent water, is sometimes filtered to reduce the water content to 20 to 30 per cent. This filter cake is then fed into the kiln.

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