Cement

Hydraulic binder used in the composition of mortar and concrete

Cement

A cement is a binder used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel (aggregate) together. Cement mixed with fine aggregate produces mortar for masonry, or with sand and gravel, produces concrete.

From Wikipedia, under CC BY-SA. More on occurri.