A cement is a binder. It is a substance that sets and
hardens and can bind other materials together. Cement is usually in a form of
powder which is being mixed with other materials and water. The most important
uses of cement are as a component in the production of mortar in masonry, and
of concrete, a combination of cement and an aggregate to form a strong building
material. Cements used in construction can be characterized as being either
hydraulic or non-hydraulic, depending upon the ability of the cement to set in
the presence of water.
