The diagram shows the stages and equpiment used in the cement-making process, and how cement is used to produce concrete for building purposes.

The two diagrams illustrate the steps and equipment involved in the production of

cement

and the way in which

cement

is used to make concrete.

Overall

, limestone and clay pass through four stages before being bagged

ready

Correct word choice

and ready

show examples

for use as

cement

.

Cement

is

then

combined with three other materials to create concrete.

While

the process of making

cement

uses a number of tools, the production of concrete is simpler and requires only a concrete mixer. In the first stage of making

cement

, limestone and clay are crushed together to form a powder.

This

powder is

then

passed through a mixer before being subjected to heat in a rotating heater. The resulting mixture is ground in order to produce

cement

which is

then

packed in bags ready to be used. Regarding the second diagram, concrete consists of mainly gravel which is small stones, and

this

makes up 50% of the ingredients. The other materials used are sand (25%),

cement

(15%) and water (10%). These are all poured in a concrete mixer which continually rotates to combine the materials and ultimately produce concrete.