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

and concrete, to be

further

used for construction purposes,

as well as

equipment

Correct article usage

the equipment

show examples

involved in it.

Overall

, with a lot of equipment involved,

production

Correct article usage

the production

show examples

of

cement

is far more complex than that of concrete.

Nevertheless

, to make the

cement

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

whereas

for the concrete four are needed. In order to make

cement

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

subsequently

milled in a grinder. The ready substance, called

cement

, is

finally

packed in bags, so

as

Correct word choice

that

show examples

it can be

further

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

such

as

cement

, water, sand and gravel. Water and

cement

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

while

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.