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The term lime is often used to cover quicklime, slaked lime (hydrated lime) and milk of lime.

For a particular use, an appropriate choice is made from the four: limestone, quicklime, slaked lime or milk of lime.

The role of the calcium sulfate is to prevent the cement from setting too quickly.

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About 7500 tonne of ground raw material (known as raw meal) are required for that output.

The photo was taken at a cement works in Maryland, US.

Large lumps of calcium carbonate are often used where sizeable quantities of aggregate are needed, for example for the foundations of roads. It reacts with clay Limestone is also the main constituent of cement and concrete.

Cement is made by first mixing limestone and substances such as clays (which contain silica, alumina and iron(III) oxide) to a fine powder.

In many uses, lime reacts more quickly than limestone but is more expensive, because a high temperature is required to produce it from limestone.

The principal uses, by far, of limestone and lime are in the construction industry and cement making.

The mixture is crushed and fed into a rotary kiln, which is an iron pipe, 60-90 m long and approximately 6 m in diameter.

The pipe is rotated and heated to about 1700 K by flame inside of it.

They are also used in the chemical and metallurgical industries and in agriculture.

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