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 diagrams illustrate the stages and equipment involved in

cement

Use synonyms

production,

as well as

Linking Words

the

process

Use synonyms

by which

cement

Use synonyms

is used to manufacture concrete.

Overall

Linking Words

, the

cement

Use synonyms

production

process

Use synonyms

consists of five main stages, beginning with the combination of limestone and clay and ending with the

cement

Use synonyms

being packed in bags.

In contrast

Linking Words

, concrete is produced through a simpler

process

Use synonyms

, in which

cement

Use synonyms

is combined with several other materials.

To begin

Linking Words

with, limestone and clay are fed into a crusher, where they are reduced to powder.

Next,

Linking Words

the powder is transferred to a mixer and

subsequently

Linking Words

conveyed through a pipe into a rotating heater. In the rotating heater, the mixture is heated to a high temperature until it melts. The resulting material is

then

Linking Words

ground in a grinder to produce

cement

Use synonyms

.

Finally

Linking Words

, the

cement

Use synonyms

is packaged in bags and made ready for distribution. As for concrete production, the

process

Use synonyms

is relatively straightforward compared to

cement

Use synonyms

manufacturing. Four ingredients - 15%

cement

Use synonyms

, 10% water, 25% sand, and 50% gravel - are combined in a concrete mixer to form concrete for construction purposes.