The diagrams below show the stages and equipment used in the cement-making process, and how cement is used to produce concrete for building purposes. Summarise it.

The first diagram illustrates the process of

cement

manufacture, and the

second

one

show

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shows

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the

materials

that are used

while

producing concrete.

It is clear that

there are five stages in the production of

cement

, beginning with the input of raw

materials

and ending with the packaging of finished products. To produce concrete, four different

materials

are mixed together.

At the first stage

in

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of

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the

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cement

production, limestone and clay are crushed to form

powder

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a powder

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.

This

powder later enters

into

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a mixer before passing into a rotating heater. After heating, the resulting mixture is poured onto

a

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the

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ground, and it is processed by a grinder.

Finally

,

cement

is produced and packaged in large bags.

Cement

is one of the four raw

materials

that are used in the production of concrete,

along with

gravel, sand and water. To be exact, concrete consists of 50% gravel, 25% sand, 15%

cement

and 10% water. All four

materials

are blended together in a rotating machine called a concrete mixer.