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 first diagram shows how cement is produced whereas the second demonstrates how this cement is utilized to produce concrete for the construction industry.
Initially limestone and clay are passed through a crusher to produce powder. Once this powder has been through a mixer it goes to a rotating heater where heat is applied. The produce is placed on a conveyer belt and with the aid of a grinder, cement is produced. Finally, the cement is packed into bags.
In order to make cement, a mixture of four components is used in different proportions; cement (15%), water (10%), sand (25%) and gravel which makes up half of the ingredients. This mixture is put into a rotating concrete mixture and then applied to a building surface.
In conclusion, limestone and clay produce cement in a process that involves crushing, rotating and applying heat. When three more elements are added to the cement and stirred on site, concrete is produced for building purposes.
Question taken from IELTS 8 past papers p.78
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