The diagrams illustrate the various stages and equipment involved in the manufacture of cement, as well as the subsequent process of combining it with other ingredients to produce concrete for construction purposes.
Overall, it is clear that cement production is a multi-step, sequential process requiring specialized machinery, whereas concrete production is a one-step mixing process that relies on specific proportions of different materials, including the newly made cement.
Looking at the first diagram, cement production begins when limestone and clay are fed into a crusher, which reduces them to a fine powder. This powder then passes into a mixer before being transferred to a rotating heater. In this cylinder, the mixture is continuously heated from one end. After the heating stage, the material is processed by a grinder, resulting in the final cement product, which is then packaged into bags.
Turning to the second diagram, concrete is created using a rotating concrete mixer. This process involves combining four distinct ingredients in precise percentages: half of the mixture is gravel (50%), followed by sand at 25%, cement at 15%, and finally, water at 10%. All these components are poured into the mixer, which rotates to blend them thoroughly into concrete.