Cement is a highly consumed material over the world for constructional purposes. Different types and brands of cement products are available in the market. Sand and water are also used, where cement is used as a construction material.
Raw materials are taken from natural environmental
Each step of cement manufacturing, physical conditions and reactions occurred are explained here.
One part of clay and three parts of powdered limestone are mixed together.
Mixture is heated about 1770 - 1870 K in the rotary klin to occur the reactions.
Limestone decomposes to lime and carbon dioxide due to high temperature.
Lime reacts with alumina and silica and form calcium silicate and calcium aluminate.
These reactions are happened at very high temperatures. Here 20-30% mass melts and combines with solid mass. It is called cement clinkers.
Gypsum is added 2-3 % by weight. Then it is powdered. It's called Portland cement.
Gypsum can decrease the settlement of cement while cement gets sufficient hardness.
Related Tutorials of Cement Production