■ DirectionYou have 20 minutes to plan and write your response. Your response will be judged on the basis of The quality of writing and on how well your response presents the points in the lecture and the relationship to the reading passage. Typically, an effective response will be 150 to 225 words.■ QuestionSummarize the points made in the lecture you just heard, explaining how they cast doubt on the points made in the reading

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Your Answer ▼

The diagrams give information about how cement is made and how concrete for constructing purposes is produced by using the cement.

Overall, there are two stages and the first stage which is the process of making cement consists of five steps, beginning with crusher. The second stage is the method of making concrete and this has four ingredients.

Turning to the details of the diagrams, the first stage starts with crushing limestone and clay. After that, putting the limestone and clay powder into a mixer and then putting in the rotating heater. After heating, cement is made by grinding this heated power. The last step is packing cement in bags.

The second stage consists of four components which are cement, water, sand, and gravel. Out of all the materials, the gravel accounts for half and this is followed by sand which make up of a quarter, cement (15%), and water (10%). Finally, mixing all together in the concrete mixer.