The two diagrams illustrate the process of producing cement, and how to produce concrete respectively.
The production of cement involves five different steps from crushing the ingredients to packaging of the final product. When it comes to production of concrete, 4 ingredients including cement are mixed together in a special machine to produce the final product.
To produce cenment, limestone and clay should be crushed into powder. Then it goes through a mixer and be heated as passing a rotating heater. The heated material are ground by grinder, and finally cement is produced and packaged in bags. The cemnet which is procuded in this process is used to produce concrete along with other three materials. To be more specific, to produce concrete, 15% of cement, 25% of sand, 50% of gravel and 10% of water are used. All those ingredients are mixed in a concrete mixer, which is special machine rotating continueously to mix them well.
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