The first figure displays the cement-production procedure. Meanwhile, the second diagram depicts the process of making concrete by using cement.
From an overall perspective, cement making included six stages. The second figure illustrates that a mixture of four ingredients produces concrete.
The first figure shows that the first step of cement production is crushing the limestone and clay and change them to powder by using a crusher. Then, the powder is mixed and a rotating heater heated this mixture. In the next step, the heated mixture passes a grinder and becomes cement. Finally, the produced cement is wrapped in the bags.
The second figure delineates one of the cement usages, concrete production. For this aim, cement, water, gravel, and sand are mixed with a concrete mixture. To have qualified concrete, the proportion of each ingredient is important. Gravel accounts for half of the concrete mixture; the remaining 50% contain sands(25%), cement ( 15%), and water(10%).
- It is generally believed that some people are born with certain talents for instance for sport or music and others are not However It is sometimes claimed that any child can be taught to become a good sports person or musician Discuss both these views and
- The map below is of the town of Garlsdon A new supermarket S is planned for the town The map shows two possible sites for the supermarket Summarise the information by selecting and reporting the main features and make comparisons where relevant
- Some people say History is one of the most important school subjects Other people think that in today s world subjects like Science and Technology are more important than History Discuss both these views and give your own opinion 67
- the pie charts below show units of electricity production by fuel source in Australia and France in 1980 and 2000 67
- the plans below show a public park when it was first opened in 1920 and the same park today Summarise the information by selecting and reporting the main features and make comparisons where relevant 73