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

The diagrams illustrate the way in which

cement

is made and how it is

then

used in the process of making concrete.

Overall

, limestone and clay pass through four stages before being bagged

ready

Correct word choice

and ready

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for use as

cement

which accounts for 15% of the four materials used to produce concrete.

While

the process of making

cement

uses a number of tools, the production of concrete requires only a concrete mixer. In the first stage of making

cement

, limestone and clay are crushed together to form a powder.

This

powder is

then

combined in a mixer before passing into a rotating heater which has constant heat applied at one end of the tube. The resulting mixture is ground in order to produce

cement

. The final product is afterwards put into bags ready to be used. Regarding the second diagram, concrete

consist

Change the verb form

consists

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of mainly grave, which

is

Correct subject-verb agreement

are

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small stones, and

this

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

cement

(15%), and water (10%). These are all poured into a concrete mixer which continually rotates to combine the materials and ultimately produces concrete.