The diagram below shows 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 1st pictorial diagram illustrates the phases and equipment used in the process of making

cement

and 2nd chart shows how it is

then

used for the production of concrete for building purposes.

Overall

, there are 5 main stages of producing

cement

, starting with preparing the natural resources and ending with packing,

while

the production of concrete is quite straightforward with only mixing and rotating. Commencing with plaster,

firstly

, limestone and clay are collected and passed through a crusher to be pulverized into powder. After that, a mixer will be used to guarantee that different substances are compounded well together.

Then

, the compound is heated up and rotated in a cylinder pipe. The output of

this

phase will be rolled out and ground into the expected form which is

cement

.

Finally

, the adhesive is packed in bags to be in use. Regarding the second picture,

cement

will be one of the ingredients in the process of making concrete. A compound of

this

mud-like substance is poured into a mixer. In

this

combination,

cement

only accounts for 15%,

while

a half and a quarter of it is gravel and sand, and the rest is water. As the mixer spins around, the concrete is eventually carried out.