The diagrams 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 given illustration demonstrates the process by which

cement

is made

,

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and later used in the concrete for construction work.

Overall

, what stands out from the diagrams is that

cement

production is a multi-stage task requiring only two raw materials,

while

creating concrete needs a number of ingredients, and is completed in just a single step. Focusing first on how

cement

is made,

initially

, limestone and clay are passed through a crusher to make a powder which is

the

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mixed properly.

This

mixture is now rotated and heated in a cylindrical pipe with an external heating source.

Finally

,

cement

is obtained after finely grinding

this

mix and later packed in

cement

bags. Turning to concrete production, in a giant concrete mixer all the components are added in fixed proportions. Half of

this

is gravel, which

are

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is

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small stones,

whereas

the earlier produced

cement

and sand account for 25% and 15%, respectively, and the remaining percentage

made

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is made

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up

by

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of

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water.

This

is

then

rotated continuously to get concrete which can be used for building purposes.