What is Cement?
Cement is a binder, a substance that sets and hardens and can bind other materials together. Cements used in construction can be characterized as being either hydraulic or non-hydraulic, depending upon the ability of the cement to be used in the presence of water. Non-hydraulic cement will not set in wet conditions or underwater, rather it sets as it dries and reacts with carbon dioxide in the air. It can be attacked by some aggressive chemicals after setting. Hydraulic cement is made by replacing some of the cement in a mix with activated aluminum silicates, pozzolanas, such as fly ash. The chemical reaction results in hydrates that are not very water-soluble and so are quite durable in water and safe from chemical attack. This allows setting in wet condition or underwater and further protects the hardened material from chemical attack (e.g., Portland cement).
Uses of Cement
- Cement mortar for Masonry work, plaster, and pointing etc.
- Concrete for laying floors, roofs and constructing lintels, beams,weather-shed, stairs, pillars etc.
- Construction for important engineering structures such asbridge,culverts,dams,tunnels,light house,clocks,etc.
- Construction of water, wells, tennis courts, septic tanks, lamp posts, telephone cabins etc.
- Making joint for joints, pipes, etc.
- Manufacturing of precast pipes, garden seats, artistically designed wens, flower pots, etc.
- Preparation of foundation, watertight floors, footpaths, etc.