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 diagram illustrates the procedure for producing building materials,

cement

and concrete.

Overall

, the procedure involves 7 main processes in total to prepare mixed concrete for building use, including 5 stages in the process of making

cement

and 2 processes in producing concrete by using

cement

. First of all, limestone and clay are squeezed together by a crusher to become a powder

mixture

. The

mixture

then

crosses through a mixer and arrives rotating heater. At stage three of the process, the

mixture

is

then

heated by a flame in the rotating heater. After that, Grinder is used to grind the

mixture

as

cement

.

Finally

,

cement

is

then

packed into bags for later use. To make mixed concrete for building use, there are totally four ingredients that need to be added into a concrete mixer to produce concrete,

including

Change preposition

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15% of

cement

, 10% of water, 25% of sand and 50% of gravel, which consists of small stones. Before becoming a fully mixed concrete

mixture

, the concrete mixer has to be rotated clockwise consistently.