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 figure illustrates the production of concrete starting from limestone and clay.

Overall

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, the global process includes 5 stages beginning with raw materials.

Firstly

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, cement is made using limestone and clay both are introduced at the same time in the crusher to make a powder that later is mixed.

Then

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the mixture is heated in the rotating heater, and once is hot is taken to the grinder and turned into cement which is put into bags for easier transport.

Secondly

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, in order to make concrete, the following ingredients are poured into a mixer: 50% of gravel, 25% of sand, 10% of water and 15% of the product previously made.

Lastly

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, the machine rotates in order to generate a homogeneous mixture, the final product, that can be used in construction.

To sum up

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, the diagram shows how the concrete

that is

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used for building purposes is made using limestone, clay, sand, water and gravel.