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.
Write at least 150 words.
TEST TAKER'S RESPONSE.
The first flow diagram illustrates the process of cement production, and the second diagram shows steps in the process of using cement to produce concrete. We can see that cement is made using two main raw materials, and that the manufacturing process consists of five distinct stages. On the other hand, it requires four main raw materials to produce concrete. In the first stage in the production of cement, crush limestone and clay are crushed into powder, the collected powder is mixed. Next, this mixture is heated in a rotating heater. After heating, the resulting product can then be ground in a machine to produce cement. Concrete production begins with the mixing of the main materials, with cement accounting for 15%, water for 10%, sand for 25%, and gravel for 50%. The collected materials are sent to a concrete mixture, where they are fully combined to create concrete.