Monday 20 October 2014

the cement and concrete making processes

Sample Answer 1 :
The two pictures illustrate how cement and concrete are produced. It is a long process with various and the process itself involves crushing, mixing, rotating, heating, grinding, bagging and mixing. 

First, limestone and clay are passed through a machine which crushes them together, producing a powder which then goes through a mixer and on to a rotating heather where heat is applied to the mixed material. The resulting mixture is put through a grinder where it is ground into cement. This final product is then put into bags, ready to be used in the next stage of the process, making concrete, represented by the second illustration. 

For the production of concrete, a composition of 15% cement is mixed with 10% water 25% sand and 50% gravel, all in a concrete mixer where it is churned or rotated until the mixture is ready to be used for whichever purpose is intended. At this end point when it is appropriately mixed together, it will be termed concrete (162 words) MH

Sample Answer 1 :
The illustration depict the production steps to create cement and concrete, which are used for construction.  Overall, there are five steps involved in producing cement, which starts from crushing limestone and clay until it is packaged, while the making of concrete involves only a single step.

The making of cement begins with crushing the clay and limestone until they are changed into powder.  Then the powder is put into a mixer, and then heated in a rotating tube.  Next, the powder is poured into a grinder where it is blended and processed until it becomes cement.  Following that, the cement is put into bags before being distributed to construction areas.

The cement is one of the most important const
ituents needed to  produce concrete.  Cement (15%), water (10%), sand (25%), and gravel (50%) are poured into a concrete mixer, and stirred and blended until the mixture becomes concrete (151 words) tia

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