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

Use synonyms

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

the

Correct article usage

apply

show examples

concrete production. During the initial step of

the

Correct article usage

apply

show examples

cement

Use synonyms

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

Then

Linking Words

,

this

Linking Words

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

while

Linking Words

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

then

Linking Words

ground to make

cement

Use synonyms

and packed in large bags.

According to

Linking Words

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

cement

Use synonyms

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

Overall

Linking Words

, there are five main steps in

the

Correct article usage

apply

show examples

cement

Use synonyms

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.