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 the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram shows the stages for the

production

of

cement

and concrete. In order to produce concrete it is necessary to use

cement

as an

imput

Correct your spelling

input

. For the

production

of

cement

,

first

Add a comma

,first

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it is necessary to have limestone and clay, after that both materials are transformed to powder

due to

the crusher. The powder

then

enter

Change the verb form

enters

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to

Change preposition

apply

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the mixer to combine both

imputs

Correct your spelling

inputs

. Once it is mixed, heat is applied in a rotating heater and

finally

Add a comma

,finally

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it is

grinded

Correct your spelling

ground

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to eliminate impurities. After the

production

process is done,

cement

can be applied in bags. For

the

Correct article usage

apply

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concrete

production

, it is needed to combine 50% of gravel,

that

Correct pronoun usage

which

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are

Correct subject-verb agreement

is

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small stones, 25% of sand, 15%

cement

and 10% water in a concrete mixer. Once it is correctly mixed, we have concrete.