Question

write a few points about the cement

Answer 1

A cement is a binder, a substance used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel (aggregate) together. Cement mixed with fine aggregate produces mortar for masonry, or with sandand gravel, produces concrete. Cement is the most widely used material in existence and is only behind water as the planet's most-consumed resource.[1]

Cements used in construction are usually inorganic, often lime or calcium silicate based, and can be characterized as either hydraulic or non-hydraulic, depending on the ability of the cement to set in the presence of water (see hydraulic and non-hydraulic lime plaster).

Non-hydraulic cement does not set in wet conditions or under water. Rather, it sets as it dries and reacts with carbon dioxide in the air. It is resistant to attack by chemicals after setting.

Answer 2

▶️CEMENT IS AN IMPORTANT BUILDING MATERIAL.EMPLOYED IN DIFFERENT KINDS OF CONSTRUCTION .

$\mathbb{THE \:RAW \:MATERIALS\: USED\: FOR \:PREPARATION \:OF \:CEMENT:}$

⭕1] CALCEROUS SUBSTANCE:
Which supply CaO such as limestone chalk marble Marine Shields etcccc.

⭕2] ARGILLACEOUS SUBSTANCE:
Containing is SiO2 and Alumina these are clay, Slate, shell and blast furnace slag .

⭕3] GYPSUM:
CaSo4 .2H2O It is added in calculated quantity in order to adjust the rate of setting of cement .

⭕4]For a good quality cement the ratio of SiO2 to Al3O3 should be between 2.5 and 4.0

⭕5] For the manufacturing of cement lime stone and clay are fused by strong heating to form cement clinker .

▶️$\underline{SOME \:OF\: ITS \:USES : }$

1) Mixeed with sorel cement is used for plastering
2) It is used in the construction of tunnels, dams, houses, roads ,bridges etcccc