The diagram below shows the stages and equipment used in the cement-making process, and how cement is used to produce concrete for building purposes.

The pictures above depict the

process

of creating

cement

, and later the

production

of concrete. One noticeable feature is that

the

Correct article usage

apply

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cement

production

is mostly a step-by-step

process

,

whereas

the

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concrete

production

is mainly a one-step

process

containing

mixture

Add an article

a mixture

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of different elements. The picture on the left describes the

process

of making

cement

by

initiating

Verb problem

apply

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mixing limestone with clay

,

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and putting

them

Correct pronoun usage

it

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through a crusher. The produced powder is

then

run through a mixer first and

then

through a rotating heater. After receiving heat, the output is put on a grinder, which eventually produces the

cement

. The

cement

is

then

bagged and shipped off to a construction location to make concrete. The

production

of concrete, as explained in the picture on the right, requires

mixing

Correct article usage

the mixing

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of different

element

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elements

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with different ratios.

Overall

, 15%

cement

is mixed with 10% water, 25% sand, and 50% gravel and

are

Correct subject-verb agreement

is

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all put in a giant mixer. The mixer

then

rotates clockwise for

sometime

Replace the word

some time

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, after which the concrete is produced.