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 first diagram illustrates the process of

cement

manufacturing, and the second diagram illustrates the components that are used in

the

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concrete production. During the initial step of

the

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cement

manufacturing, clay and limestone are crushed into powder by the crushing machine.

Then

,

this

crushed powder goes to the mixer. After that, the mixed powder is heated

while

going through the rotating heater. Once the mixture has been heated, it is

then

ground to make

cement

and packed in large bags.

According to

the second illustration, the four raw components are used to produce concrete:

cement

, water, sand and gravel (15%, 10%, 25% and 50% respectively). These materials are mixed together in the rotating concrete mixer.

Overall

, there are five main steps in

the

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cement

production, starting from adding raw materials and finishing with packing the finished product into bags. On the other side, the production of concrete requires fewer steps and more materials.