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. Summarize and information by selecting and reporting the main features and make comparisons where relevant.

The diagram illustrates the process of manufacturing

cement

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and concrete, to be

further

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used for construction purposes,

as well as

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equipment

Correct article usage

the equipment

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involved in it.

Overall

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, with a lot of equipment involved,

production

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the production

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of

cement

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is far more complex than that of concrete.

Nevertheless

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, to make the

cement

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one will need only two ingredients, namely, limestone and clay,

whereas

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for the concrete four are needed. In order to make

cement

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, limestone and clay are crushed, followed by the resulting powder being mixed. After that, the substance is passed through a rotating heater and

subsequently

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milled in a grinder. The ready substance, called

cement

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, is

finally

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packed in bags, so

as

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that

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it can be

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transported. As regards concrete, to produce it one needs four ingredients,

such

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as

cement

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, water, sand and gravel. Water and

cement

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make up the smallest proportions at 10% and 15% respectively,

while

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sand and gravel together comprise three-quarters of the concrete mass, half consisting of the small stones. Having been put in the concrete mixer, all of these substances are blended, which results in obtaining concrete.