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.

The diagram displays the stages and equipment involved in the production of

cement

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and the way each

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cement

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stage

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is

then

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used to make concrete.

Overall

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,

cement

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-making is a linear process consisting of three main stages

:

Punctuation problem

:

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crushing, mixing, and heating.

Cement

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is

then

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used as a key ingredient in concrete production. The first step of producing

cement

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is to add limestone and clay

in

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into

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crusher

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the crusher

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to extract the powder.

Then

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the powder should be mixed in the mixer.

Next,

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it needs to be heated in

rotating

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a rotating

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heater. The output is fed into a grinder to produce

cement

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.

Finally

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, the

cement

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is packed in bags. The

cement

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used

Verb problem

is used

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for manufacturing the concrete. Regarding the second diagram, concrete

consist

Correct subject-verb agreement

consists

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of mainly

Correct word order

mainly of

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gravel, which is small stones

and

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, and

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this

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makes up 50% of the ingredients. The other materials used are sand (25%),

cement

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(15%), and water (10%). All the ingredients

poured

Verb problem

are poured

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in

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into

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the concrete mixer

which

Punctuation problem

, which

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continually rotates to combine the materials and

produces

Correct subject-verb agreement

produce

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concrete.