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 diagram illustrates the stages and tools used in the process of making

cement

and producing concrete with

the

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cement

for building purposes. First of all, limestone and clay is crushed into powder by the crusher.

Then

it is mixed by the mixer and heated by the rotating heater. After the heated mixture is

grinded

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ground

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, it becomes

a

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cement

.

Finally

, the

cement

is packed in bags for reselling and other purposes. In the second diagram, we can see that the process of making concrete is simple compared to producing

cement

. Concrete is made by mixing four different substances : 15%

of

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cement

, 10%

of

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water, 25%

of

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sand and 50%

of

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gravel which are small stones.

Overall

, making

cement

needs various tools as

cement

is produced by mixing, heating and grinding limestone and clay.

However

, making concrete only needs a mixer as it is produced by mixing substances.