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.

The given diagram illustrates the process of

cement

making and special technical equipment, and

also

how

cement

is used for producing concrete to build houses.

Overall

, it can be seen that

cement

cement

-making process consists of five stages smashing, mixing, heating, grinding, and packing.

Initially

, limestones and clay are put into the crusher where they are smashed into the powder.

Then

powder goes through the

mixer

. The next stage of heating occurs in a special oven which circulates 360 degrees during the whole heating process.

After

this

stage, a homogenous mass appears which goes to the grinder.

Further

, produced

cement

is packed into paper or plastic bags.

Finally

, packed

cement

is ready for selling or for the production of concrete. As well known, concrete is the essential raw material in construction. That's why concrete production requires special equipment and keeping the rules of producing technology. As we can see from the diagram to produce concrete, need a concrete

mixer

.

First,

15 per cent of

cement

and 25 per cent of sand are put

it

Correct pronoun usage

apply

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into the

mixer

, and

then

what is added.

Further

mixer

starts to roll. Later, small stones, which are called gravel, are added to the mixture in the

mixer

. After a

while

, produced concrete can be used for building purposes.