The given diagrams illustrate the way in which 
cement
 is made and used to make concentrate for manufacturing purposes. It is apparent thatUse synonyms
,
 limestone and clay pass through  four stages before being bagged and ready to use as Remove the comma
apply
cement
, after which 15% of Use synonyms
cement
 is used for making compound concrete. Use synonyms
While
 Linking Words
cement
 production consists of several stages and tools, concrete production requires only one stage and one tool, a concrete mixer. 
In the first stage of making Use synonyms
cement
, limestone and clay are crushed together to form powder. Use synonyms
Next, 
the resulting powder is sent through the mixer before entering a rotating heater with constant heat applied at  one end of the tube. After heated, the material is poured into the grinder and after that Linking Words
cement
 is ready to package. 
In terms of concrete production, the main material is gravel, which is small stones, and Use synonyms
this
 makes up exactly  half of the ingredients, 50%. The other materials used are sand (25%), Linking Words
cement
 (15%), and water (10%). All the materials are poured into the concrete mixer until all of them are combined and the concrete is ready to use for building purposes.Use synonyms