雅思写作话题及范文: The diagrams below show the stages and equipment use...

雅思写作话题及范文: The diagrams below show the stages and equipment use...

范文

The diagrams show the processes and the equipments used to make cement, and how these are used to produce concrete for building purposes. The first step in the cement productions is to introduce limestone and clay. These materials pass through a crusher that produces a powder. Then this powder goes into a mixer. After this, the product passes to a rotating heater which works with heat. Afterwards, the mixture goes into a grinder where the cement comes out. At the end of the process, the cement is packed in bags.?? Referring to the concrete production, the process begins with a combination of 15% cement, 10% water, 25% sand and 50% gravel. These four elements are introduced into a concrete mixer.

As mentioned above, the concrete production takes fewer steps than the cement production, however, it is necessary to use more materials than the latter process in order to obtain the final product.

The last difference between both progresses is that the concrete mixer does not work with heat.

图表显示了用于制造水泥的工艺和设备，以及如何使用这些设备生产建筑用混凝土。水泥生产的第一步是引入石灰石和粘土。这些材料通过破碎机产生粉末。然后这些粉末进入混合器。之后，产品进入旋转加热器，该加热器与热量一起工作。然后，混合物进入粉碎机，在那里产出水泥。在工艺结束时，水泥用袋子包装。关于混凝土生产，该过程从15%水泥、10%水、25%砂和50%砾石的组合开始。这四个元素被引入混凝土搅拌机中。

如上所述，混凝土生产的步骤比水泥生产的步骤少，但是，为了获得最终产品，需要使用比水泥生产更多的材料。

两种进度之间的最后一个区别是混凝土搅拌机不能在高温下工作。