Cement is a powdery substance made with calcined lime and clay. Cement is rarely used on its own, but rather used to bind sand and gravel together. the binding of other materials makes it much stronger than on its own. Cement mixed with fine aggregate produces mortar for masonry, or with sand and gravel, produces concrete. How cement is made.

Portland Cement is the most common type of cement for common use. It was developed by the english in the 19th century, but was experimented with earlier than this.

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