IELTS WRITING TASK 1 - Process

The diagram demonstrates the process by which cement is manufactured and how it is used in the concrete production process.

Overall, it can be seen that various equipment and tools are involved to carry out the cement-making process. By contrast, the concrete production only requires a concrete mixer.

At the first stage of the cement production process, limestone and clay are crushed together to form a powder. After that, the powder is then combined in a mixer, and it subsequently follows a pipe to a rotating heater, where constant heat is introduced at one end of the tube. At the following stage, the resulting mixture is ground in order to produce cement. The final product is then put into bags ready to be used.

During the concrete-making process, a variety of ingredients is poured into the concrete mixer. Gravel, which is small stones, accounts for exactly half of the ingredients, which doubles the amount of sand. The other materials used are water (10%) and cement (15%). Finally, the concrete mixer rotates continuously to combine the materials and finally produces the concrete.