Task1:Concrete production.(Thank you,Lu!)

[Zachray23]

The flow diagrams demonstrate the steps and facilities utilised in the cement-making process, and how the cement is put into use to generate concrete for constructions.

It is clear that the first diagram that the combination of limestone and clay are poured into mixer through crusher in the first step, with some powder adding to this process. Then the mixture is heated in rotating heater to produce grinder. The last step is to pack the product of cement into bags.

According to the second diagrams we can see that 15% of cement is dumped into the concrete mixer accompanied by 10% of water. Then sand and gravel(that is, small stones) are both added into the mixer, with 25% and 50% respectively. After mixing in the container for a period of time, we will see the final product, concrete.

Overall, it is manifest that a successive of processes are needed to produce concrete.

TOEFL listening lectures: A university lecture by a professor of Art History

[Luschen]

Hi Zachray, you had quite a few problems decoding the cement diagram and your concrete description is not that clear. Hopefully my comments will help you out.

@Zachray23

The flow diagrams demonstrate the steps and facilities utilised in the cement-making process, and how the cement is put into use to generate concrete for constructions{“construction” is better or “for use in construction” is probably best}.

It is clear that[from] the first diagram that the combination of limestone and clay are poured into mixer through crusher in the first step,{“are poured through a crusher and into a mixer in the first step” sounds more clear to me} with some powder adding to this process. {no, the limestone and clay are formed into a powder by going though the crusher} Then the mixture is heated in [a] rotating heater to produce grinder.{no, the grinder is another device that the cooked powder goes through - when it exits the grinder, it has become cement} The last step is to pack the product of [finished] cement into bags.

According to the second diagrams we can see that 15% of cement {no, the cement forms 15% of the total ingredients} is dumped into the concrete mixer accompanied by 10% of water. Then sand and gravel(that is, small stones) are both added into the mixer, with 25% and 50% respectively. After mixing in the container for a period of time, we will see the final product, concrete.

{maybe “According to the second diagram, concrete is made up of cement, water, sand and gravel. A mixture of 15% cement, 10% water, 25% sand, and 50% gravel, or small stones, is poured into a concrete mixer. The mixer rotates, mixing all the ingredients together to form concrete.” }

Overall, it is manifest that a successi[on] of processes are needed to produce concrete.

TOEFL listening lectures: A university lecture by a professor of Art History