The illustrations demonstrate how 
cement
 and concrete are produced in order to use them for building purposes. Use synonyms
Overall
, Linking Words
cement
 and concrete generations are a 7 stage, man-made, Use synonyms
lineer
 Correct your spelling
linear
process
 starting with limestone and clay Use synonyms
are 
being added to produce Unnecessary verb
apply
cement
 and ending with concrete production. 
First of all, limestone and clay are Use synonyms
being 
added into a crusher machine to generate Unnecessary verb
apply
powder
 of these raw Add an article
a powder
materials
 and Use synonyms
this
 power is mixed in a mixer and conducted to a rotating heater for Linking Words
heating
 Add an article
the heating
process
. After the heating Use synonyms
process
, the heated product is converted to Use synonyms
cement
 with the help of a grinder and Use synonyms
then
 it is put into bags.
Following that, four concrete Linking Words
materials
 are put into a concrete mixer to mix together. Gravel, small stones, is the major component of the mixture with half of the total raw Use synonyms
materials
 and Use synonyms
this
 Linking Words
followed
 by sand with 15% of the mixture. The remaining Add a missing verb
is followed
materials
, Use synonyms
cement
 and water, are added with 15% and a tenth of the total raw Use synonyms
materials
 respectively. After the mixing Use synonyms
process
, concrete is produced as a final product.Use synonyms