The diagrams below show the stages and equipment used in the cemen-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 comparison where relevant.

The given diagrams illustrate the several steps of

cement

production

and its equipment, and the

process

of

cement

is used to make concrete for building aims.

Overall

, there are five stages of

cement

production

starting from the mixture of all the raw materials to packing them into bags, and there are only two stages of concrete

production

. Looking at the information of the

cement

-making

process

, all the raw substances including limestone and clay are crushed by a machine so that it becomes powder.

Then

,

this

powder is mixed into the mixer machine.

Subsequently

, it passes through a rotating heater where fire is added into the heater hole. The next

process

is putting the substance into a grinder, and the

cement

is ready to pack into the bags. With respect to concrete

production

, there is a particular formula in

this

process

which is 15% of

cement

, 10% of water, 25% of sand, and 50% of gravel put into a big concrete mixer. All those materials are mixed and it is ready to use for building purposes.