Writing Part 1: Cement and concrete production (describing a process)

The two diagrams clearly show all the materials and the processes, for the creation of cement and concrete.

                Cement production begins when we place limestone and clay into the crusher, in order to produce powder. Subsequently, powder is placed into a mixer and falls through a rotating heater. Inside this pipe (heater) it melts (no commas here) and after that it is ground in order to become cement and finally be packed in bags.

                According to the concrete production diagram, a wide variety of ingredients are required for this process. More specifically, a modicum amount of water is needed, around 10%, and approximately 15% of cement. Finally, (comma) mixing the above materials with an enormous amount of gravel (which amounts to/ constitutes 50% of the final product), and a medium quantity of sand, at 25%, into a concrete mixer, which rotates clockwise, completes the final part/ stage of concrete production.

                Taking everything into account, both processes seem to be excessively time consuming. (This conclusion cannot be drawn based on the diagrams/ no exact time is included) Additionally, the concrete-making process demands twice the materials than the cement production process.